Case Reports in Orthopedics The latest articles from Hindawi © 2018 , Hindawi Limited . All rights reserved. Subacute Urinary Retention due to a Subpubic Cartilaginous Cyst Treated with Surgical Resection and Internal Fixation: A Case Report and Review of the Literature Sun, 14 Jan 2018 00:00:00 +0000 A subpubic cartilaginous cyst is a rare mass lesion derived from the pubic symphysis, which can cause acute or subacute urinary retention. We report a case of a subpubic cartilaginous cyst in a 62-year-old woman that caused lower abdominal pain and subacute urinary retention, requiring surgical resection. On physical examination, a hard, flexible, nontender mass, 4 cm in diameter, was palpable along the lower border of the pubic bone, extending to the perineum. Magnetic resonance imaging revealed a clearly distinct (3.8 cm × 3.8 cm × 7.2 cm) mass on the midpelvic side of the pelvis, centered on the pubic joint. We proceeded with en bloc resection of the mass, including a resection margin of 1 cm on either side. The bony defect was fixed with a locking plate. On pathological assessment, the mass was diagnosed as a subpubic cartilaginous cyst arising from the cartilage of the pubic symphysis. No tumor recurrence was identified over a 4-year follow-up. Based on our experience, we propose that en bloc resection of the mass, including a wider resection centered on the pubic symphysis, with internal fixation, is a possible treatment for a subpubic cartilaginous cystic mass lesion. Yu Taniguchi, Hiroshi Kamada, Hisashi Sugaya, Tomofumi Nishino, Hajime Mishima, Naoyuki Ochiai, and Masashi Yamazaki Copyright © 2018 Yu Taniguchi et al. All rights reserved. Osteoid Osteoma of the Trapezium: Case Report of an Unusual Tumor Location Presenting a Diagnostic Challenge Sun, 31 Dec 2017 00:00:00 +0000 Osteoid osteoma is a benign bone tumor, which represents approximately 10% of all benign bone tumors. When localized to the carpus, osteoid osteomas are most often seen in the scaphoid and capitate. Rarely, these tumors can also be observed in the trapezium. Given the infrequency with which osteomas are located in the trapezium and often nonspecific presenting symptoms, diagnosis of this tumor can be challenging and requires a high index of suspicion. S. E. Roberts, M. N. Mirzabeigi, A. Naik, C. Preciado, and B. Chang Copyright © 2017 S. E. Roberts et al. All rights reserved. Bipolar Dislocation of the Clavicle: A Report of Two Cases with Different Injury Patterns and a Literature Review Thu, 28 Dec 2017 09:29:50 +0000 Bipolar dislocation of the clavicle is a rare injury that is defined as a concomitant dislocation of the ipsilateral acromioclavicular joint and sternoclavicular joint. This injury is also described as a floating clavicle. Although this injury has been known for nearly two centuries, knowledge about it is limited and the treatment strategy remains controversial. Bipolar dislocation includes several combinations of both joints’ injury types. We reported two patients with bipolar dislocation of the clavicle: one with an anterior dislocation and the other with a posterior dislocation of the sternoclavicular joint. After reviewing the currently available literature, we discussed these cases to highlight the necessity of a specific treatment approach that is modified based on the pattern of each joint’s lesion. Ichiro Okano, Takatoshi Sawada, and Katsunori Inagaki Copyright © 2017 Ichiro Okano et al. All rights reserved. Delayed Radial Nerve Palsy after Closed Reduction of a Pediatric Humeral Shaft Fracture Thu, 28 Dec 2017 00:00:00 +0000 Humeral shaft fractures are common in the United States and may be associated with radial nerve injuries due to their close anatomic relationship in the spiral groove. Most radial nerve palsies are found at presentation due to the initial trauma; however, they can present secondary to orthopaedic intervention following reduction. In this case report, we present a case of delayed radial nerve palsy in a pediatric patient that was identified four days after closed reduction and splinting which required open reduction, nerve exploration, and internal fixation. Fortunately, full motor and sensory recovery was observed at 6 weeks post-op. A unique aspect of this case is that immediate postreduction exam in the emergency department showed no signs of injury or entrapment of the radial nerve. Robert Runner, Emily Whicker, and Sayan De Copyright © 2017 Robert Runner et al. All rights reserved. Fusion Surgery Required for Recurrent Pediatric Atlantoaxial Rotatory Fixation after Failure of Temporary Fixation with Instrumentation Tue, 26 Dec 2017 00:00:00 +0000 In cases of chronic irreducible and recurrent unstable atlantoaxial rotatory fixation (AARF), closed reduction and its maintenance are often unsuccessful, requiring surgical treatment. The purpose of the present report is to describe a rare case of pediatric AARF that required multiple treatments. A 6-year-old boy was diagnosed as having type 2 AARF. After conservative treatment, the patient was treated with temporary fixation surgery (C1-C2 Magerl) without a bone graft in consideration of motion preservation after screw removal. AARF recurred after the screw removal and required fusion surgery (Magerl–Brooks) with an iliac bone graft. Ultimately, bone union was achieved and the screws were removed 11 months after the surgery. We recommend surgeons be cautious when choosing temporary fixation surgery for AARF in small children. Further investigation is needed to determine the optimal time before screw removal. Yoshiyuki Matsuyama, Tetsuhiro Ishikawa, Ei Ozone, Masaaki Aramomi, and Seiji Ohtori Copyright © 2017 Yoshiyuki Matsuyama et al. All rights reserved. Structural Failure of a Modern Knee Tumor Megaendoprosthesis Thu, 21 Dec 2017 00:00:00 +0000 Modular knee megaendoprotheses are commonly used devices for distal femur or proximal tibia replacement in tumor surgery as well as for treatment of some periprosthetic fractures around a loose or failed total knee arthroplasty. Structural failures of the prosthesis are well-known postoperative complications and have been reported for various prosthesis types. In the majority of the cases, the polyethylene parts fail. We would like to present an unusual case of a broken femoral component of an MRH® endoprosthesis four years after implantation. Katrin Koch, Dieter Kohn, and Konstantinos Anagnostakos Copyright © 2017 Katrin Koch et al. All rights reserved. Multiple Tophaceous Gout of Hand with Extensor Tendon Rupture Wed, 20 Dec 2017 00:00:00 +0000 A 45-year-old man presented with painless subcutaneous masses bilaterally on his hands and loss of motion or contracture of the fingers. Initially, drug therapy to reduce the serum uric acid was administered and was expected to reduce the tophi. However, during observation at the clinic, spontaneous rupture of an extensor tendon occurred, and surgical repair of the tendon and resection of the masses were performed. Surgical exploration of the right hand showed hypertrophic white-colored crystal deposits that both surrounded and invaded the extensor digitorum communis of the index finger, which was ruptured. Histopathologic examination of the specimen demonstrated findings consistent with gouty tophi. Tophaceous gout can induce a rupture of tendons during clinical observation, and surgical resection of the tophi might be needed to prevent ruptures. Haruki Tobimatsu, Masanori Nakayama, Yu Sakuma, Hitoshi Imamura, Koichiro Yano, Hiroko Itagaki, and Katsunori Ikari Copyright © 2017 Haruki Tobimatsu et al. All rights reserved. Sacral Osteoneogenesis after Complete Sacrectomy in a Patient with Ewing Sarcoma Sun, 17 Dec 2017 00:00:00 +0000 Ewing sarcomas are the second most common primary malignant bone tumors in childhood and adolescence which rapidly metastasize. Due to improvement of treatment options in recent years, the survival rate has significantly increased. Nevertheless, lethality is still high, and neurologic symptoms are frequent. To the best of our knowledge, this is the first reported case of a sacral osteoneogenesis after complete sacrectomy in a patient with Ewing sarcoma. T. Hockertz, W. Eberl, and M. Velickovic Copyright © 2017 T. Hockertz et al. All rights reserved. C2 Solitary Bone Plasmacytoma Curettage and Vertebral Augmentation in an 83-Year-Old Female: Case Report and Review of Surgical Treatment Approaches in the Spine Sun, 17 Dec 2017 00:00:00 +0000 Surgically, solitary bone plasmacytoma (SBP) of the craniocervical junction (CCJ) is typically treated with cement augmentation and occipital-cervical stabilization (OCS). In the orthopedic spine literature, various surgical treatment options have been described for SBP, but only a few studies exist describing SBP of the CCJ with treatment involving cement augmentation alone. We report the case of an 83-year-old female found to have C2 SBP that was successfully treated with curettage and cement augmentation alone. Matthew J. Yousif, Taha A. Faruqi, Rakesh Ramakrishnan, and Nilesh M. Patel Copyright © 2017 Matthew J. Yousif et al. All rights reserved. Medial Condyle Fracture (Kilfoyle Type III) of the Distal Humerus with Transient Fishtail Deformity after Surgery Thu, 14 Dec 2017 00:00:00 +0000 A “Fishtail deformity” is one of the well-known complications following pediatric lateral condyle or supracondylar fractures of the humerus. We herein report a case of medial condyle fracture (Kilfoyle type III) in an 11-year-old boy. He had a transient “fishtail deformity” of the trochlear groove after open reduction and internal fixation. As occurred in the current case, the bone remodeling and the improvement of ischemia of the trochlea after medial condyle fracture may be associated with the likelihood of recovery from transient “fishtail deformity.” Motoki Sonohata, Takema Nakashima, Hiroaki Suetsugi, Masaru Kitajima, Masaya Ueno, and Masaaki Mawatari Copyright © 2017 Motoki Sonohata et al. All rights reserved. Minimally Invasive Endoscopic Approach to the Cervicothoracic Junction for Vertebral Osteomyelitis Mon, 11 Dec 2017 04:27:23 +0000 The selection of an anterior, lateral, or posterior approach to the cervicothoracic junction for surgical treatment of vertebral osteomyelitis is still a matter of debate. These ordinary approaches generally require an extensile exposure. This article describes a less invasive approach case of a vertebral osteomyelitis of T2/3 using a video-assisted operating technique of thoracic surgery (VATS). A 78-year-old female underwent anterior debridement and interbody fusion with bone graft at T2/3 using a lateral surgical approach through a right thoracotomy with VATS. The VATS through two small skin incisions in the axillary region provides a good view without requiring elevation of the scapula with extensile muscle dissection and rib resection. There was no complication without partial lobectomy due to pleural adhesion during the perioperative period. Currently, at 1 year after operation, the patient has no back pain with neurologically normal findings and no inflammation findings (CRP was 0.01 mg/dl). Although the operating field of the upper thoracic level in the lateral approach is generally deep and narrow, the VATS provides a good view and allows us to perform adequate debridement and bone fusion at the T2/3 level with a less invasive approach than those previously described anterior or laterally or posterior approach. Tadatsugu Morimoto, Masatsugu Tsukamoto, Tomohito Yoshihara, Motoki Sonohata, and Masaaki Mawatari Copyright © 2017 Tadatsugu Morimoto et al. All rights reserved. Candida albicans Osteomyelitis Pubis: The Possible Pathogenic Role of Pelvic Irradiation Sun, 03 Dec 2017 09:35:52 +0000 Radiation to the pelvis, mainly directed against either prostatic or gynecologic cancers, is burdened by a lot of complications. The genitourinary tract is most frequently involved, presenting with bladder irritation, incontinence, and fertility disorders. However, side effects of radiation can also affect the bone, usually causing an osteolytic process which deteriorates the bone structure and leads to fractures, avascular necrosis, and other pathological insults. Here, we describe a case of Candida albicans osteomyelitis of the pubic symphysis as late complication of pelvic radiotherapy performed against prostate cancer. Cristiana Iacuzzo and Jacopo Monticelli Copyright © 2017 Cristiana Iacuzzo and Monticelli. All rights reserved. Treatment of Atypical Ulnar Fractures Associated with Long-Term Bisphosphonate Therapy for Osteoporosis: Autogenous Bone Graft with Internal Fixation Wed, 29 Nov 2017 00:00:00 +0000 Long-term bisphosphonate use has been suggested to result in decreased bone remodelling and an increased risk of atypical fractures. Fractures of this nature commonly occur in the femur, and relatively few reports exist to show that they occur in other bones. Among eight previous reports of atypical ulnar fractures associated with bisphosphonate use, one report described nonunion in a patient who was treated with cast immobilization and another described ulna nonunion in one of three patients, all of whom were treated surgically with a locking plate. The remaining two surgical patients achieved bone union uneventfully following resection of the osteosclerotic lesion and iliac bone grafting before rigid fixation. We hypothesized that the discontinuation of bisphosphonate therapy, the use of teriparatide treatment, and low-intensity pulsed ultrasound (LIPUS) might have been associated with fracture healing. Yohei Shimada, Tetsuhiro Ishikawa, Jun Endo, Jo Katsuragi, Toshiaki Kotani, Hitoshi Kiuchi, Kazuki Kuniyoshi, and Seiji Ohtori Copyright © 2017 Yohei Shimada et al. All rights reserved. Bone Bruise of the Thoracic Spine Caused by Mild Physical Activity in Children Tue, 28 Nov 2017 00:00:00 +0000 Vertebral bone bruise (VBB) in children commonly occurs following a fall from a height, and more than one vertebral body may be affected. We encountered 6 children each with a single VBB caused by mild physical activity. All the children had tenderness on the corresponding spinous process with no neurologic findings. Magnetic resonance imaging (MRI) showed typical findings of VBB in all cases. The children were treated conservatively with a soft thoracolumbar brace and instructed to rest with no physical activity for a month. At follow-up 1 month later, the back pain had diminished, and the signal changes seen on MRI had disappeared in all cases. We conclude that mild physical activity may be a cause of VBB in children and good clinical results can be achieved by using a soft thoracolumbar brace and rest. Kenji Yokoyama, Kenji Endo, Yoichiro Takata, Fumitake Tezuka, Hiroaki Manabe, Kazuta Yamashita, Toshinori Sakai, Takashi Chikawa, Akihiro Nagamachi, and Koichi Sairyo Copyright © 2017 Kenji Yokoyama et al. All rights reserved. Locked Central Fracture Dislocation of the Hip in a Child after Low-Energy Trauma Mon, 27 Nov 2017 00:00:00 +0000 We present the case of a 13-year-old boy who sustained a locked central fracture dislocation of the right acetabulum following a bicycle fall. Immediate external reduction maneuvers under general anesthesia were unsuccessful due to intrapelvic entrapment of the femoral head. Open reduction internal fixation was achieved 48 hours later. After an initial satisfactory postoperative course, the patient ended up developing severe hip osteoarthritis 16 months after the procedure. The rarity of this injury in children is discussed, with its possible implications on joint congruity and potential growth injury. Alexandre H. Nehme, Jack C. Daoud, Hicham G. Abdelnour, Jad N. Bou Mounsef, Ramzi C. Moucharafieh, and Joseph W. Wehbe Copyright © 2017 Alexandre H. Nehme et al. All rights reserved. Arteriovenous Fistula after Anatomic All-Inside Anterior Cruciate Ligament Reconstruction Sun, 26 Nov 2017 00:00:00 +0000 We present the first case of an arteriovenous fistula after an all-inside anterior cruciate ligament (ACL) reconstruction. A seventeen-year-old boy had an uneventful ACL reconstruction. Four weeks after surgery, the patient was seen with a pulsating swelling at the lateral distal upper leg. Vascular consultation led to the diagnosis of pseudoaneurysm and arteriovenous fistula of the lateral superior genicular artery. Most likely, fistula is caused by the stab incision for preparation of the femoral tunnel, and no anatomical cause was found. The clinical presentation, previous cases of arteriovenous fistula after arthroscopic ACL reconstruction, possible causes, and management are discussed. Mathijs C. H. W. Fuchs, Martijn Dietvorst, Roel Vaes, Maarten Loos, Matthijs P. Somford, and Rob P. A. Janssen Copyright © 2017 Mathijs C. H. W. Fuchs et al. All rights reserved. Corrigendum to “Revision of Carpal Tunnel Release due to Palmaris Longus Profundus” Wed, 22 Nov 2017 00:00:00 +0000 Christos Lyrtzis, Konstantinos Natsis, and Evagelos Pantazis Copyright © 2017 Christos Lyrtzis et al. All rights reserved. Managing an Acute and Chronic Periprosthetic Infection Tue, 14 Nov 2017 06:38:00 +0000 A case report of a 65-year-old female with a history of right total hip arthroplasty (THA) in 2007 and left THA in 2009 was presented. She consulted with our institution for the first time, on December 2013, for right hip pain and fistula on the THA incision. It was managed as a chronic infection, so a two-stage revision was performed. First-time intraoperative cultures were positive for Staphylococcus aureus (3/5) and Proteus mirabilis (2/5). Three weeks after the second half of the review, it evolved with acute fever and pain in relation to right hip. No antibiotics were used, arthrocentesis was performed, and a coagulase-negative staphylococci multisensible was isolated at the 5th day. Since the germ was different from the first revision, it was decided to perform a one-stage revision. One year after the first review, the patient has no local signs of infection and presents ESV and RPC in normal limits. The indication and management of periprosthetic infections are discussed. Cristian Barrientos, Maximiliano Barahona, and Rodrigo Olivares Copyright © 2017 Cristian Barrientos et al. All rights reserved. Pseudomonas aeruginosa Septic Arthritis and Osteomyelitis after Closed Reduction and Percutaneous Pinning of a Supracondylar Humerus Fracture: A Case Report and Review of the Literature Tue, 14 Nov 2017 00:00:00 +0000 Infectious complications of closed reduction and percutaneous pinning of supracondylar humerus fractures are exceedingly rare. Although postoperative Pseudomonas infection is a feared complication associated with noncompliance and a wet cast, there are no reports in the literature of this occurring. We present the devastating complication of a pediatric patient who developed Pseudomonas aeruginosa subperiosteal abscess, osteomyelitis, and elbow septic arthritis after presenting to the clinic multiple times with a wet cast after closed reduction and percutaneous pinning of a supracondylar humerus fracture. We describe the treatment course for this patient, followed by the sequelae of posterolateral rotary instability. This case not only confirms that patients can get Pseudomonas infections if they get their cast wet but also stresses the importance of patient communication and compliance in preventing unfortunate complications. Adam M. Wegner, John C. Wuellner, and Brian M. Haus Copyright © 2017 Adam M. Wegner et al. All rights reserved. A Unique Case of Melorheostosis Presenting with Two Radiologically Distinct Lesions in the Shoulder Mon, 06 Nov 2017 10:40:03 +0000 Melorheostosis is a rare, nonhereditary, benign, mesenchymal condition of unknown aetiology affecting the bones and surrounding tissues. A male patient complaining of left shoulder pain, swelling, and mildly limited range of motion has an exclusive combination of the classic dripping wax lesion in the scapula and the myositis ossificans-like lesion in the deltoid muscle; this combination is the first to be reported in the shoulder. Both lesions showed typical findings of melorheostosis in radiographs, CT, MRI, and bone scan. This case has a stationary course over the follow-up period, and no specific treatment is needed in due course. Ahmed A. Elsheikh, Rohan S. Pinto, Alpesh Mistry, and Simon P. Frostick Copyright © 2017 Ahmed A. Elsheikh et al. All rights reserved. Bone Resection for Isolated Ulnar Head Fracture Thu, 26 Oct 2017 00:00:00 +0000 Distal ulnar fractures often occur with distal radius fractures (DRFs), and ulnar styloid fractures commonly occur in the setting of DRF. However, isolated ulnar head fractures are rare. We report a case of isolated ulnar head fracture in which we performed bone resection because the ulnar head bone fragment fractured when internal screw fixation was attempted. His outcome at 18 months postoperatively was considered excellent. However, we do not advocate bone resection other than failure of fixation and the difficult case to perform internal fixation. Longer follow-up would be needed because bone resection might lead to osteoarthritis of the distal radioulnar joint in the future. Hiromasa Akino, Shunpei Hama, Masataka Yasuda, Kenta Minato, and Masahiro Miyashita Copyright © 2017 Hiromasa Akino et al. All rights reserved. Therapeutic Management of a Substantial Pelvic Aneurysmatic Bone Cyst Including the Off-Label Use of Denosumab in a 35-Year-Old Female Patient Tue, 17 Oct 2017 00:00:00 +0000 Aneurysmal bone cysts (ABC) are benign bone tumors, which are highly vascularized. The main course of treatment is curettage followed by bone grafting or cement insertion. Still recurrence remains a main problem for patients. Denosumab is a monoclonal antibody, which acts as an inhibitor of the RANK/RANKL pathway, diminishing bone turnover. Recent case reports have shown that Denosumab can be a promising therapeutic agent for people suffering from therapy-resistant ABC. We report the case of a 35-year-old female patient presenting with a pronounced ABC of the pelvis. Since the tumor was inoperable, Denosumab was administered, leading to a significant shrinkage of the lesion, which allowed surgical intervention. Upon recurrence, Denosumab was restarted putting the patient once more into remission. Follow-up was four years overall with a clinical and radiological stable disease for fifteen months after final discontinuation of the monoclonal antibody. Therefore, our case further underlines the potential of Denosumab in the treatment of ABC. D. Ntalos, M. Priemel, C. Schlickewei, D. M. Thiesen, J. M. Rueger, and A. S. Spiro Copyright © 2017 D. Ntalos et al. All rights reserved. Hyperphosphatemic Tumoral Calcinosis after Total Knee Arthroplasty Mon, 16 Oct 2017 00:00:00 +0000 We report a case of hyperphosphatemic tumoral calcinosis (TC) that occurred after total knee arthroplasty. A 64-year-old Japanese man presented with painful swellings in both shoulders, the left elbow, and the right hip that developed after he underwent total knee arthroplasty (TKA). The pathology of the patient’s bone at the time of TKA included a thick osteoid seam with calcareous deposition at the margin of the trabecular bone, which is not generally seen in osteoarthritis. Computed tomography scans of the swollen joints demonstrated leaflet and amorphous calcification masses around the joints. We diagnosed the patient with TC. The present case highlights that TC lesions are rare but should be considered in the differential diagnosis of subcutaneous soft and hard masses around the joint. Takeshi Mochizuki and Katsunori Ikari Copyright © 2017 Takeshi Mochizuki and Katsunori Ikari. All rights reserved. Lumbar Spondylodiscitis Caused by Burkholderia cepacia in a Previously Healthy Patient Sun, 15 Oct 2017 00:00:00 +0000 Burkholderia cepacia spondylodiscitis is a rare entity that has been reported in only four cases. We hereby report the case of a 43-year-old, previously healthy, woman who was found to have a B. cepacia spondylodiscitis after a cholecystectomy. She was treated with a three-month regimen of ceftazidime and ciprofloxacin with complete clinical, biological, and radiological remission. Danielle Jaafar, Maroun Rizkallah, Firas Atallah, Falah Bachour, Angelique Barakat, Ghassan Maalouf, and Matta Matta Copyright © 2017 Danielle Jaafar et al. All rights reserved. Delayed Tibial Osteomyelitis after Anterior Cruciate Ligament Reconstruction with Hamstrings Autograft and Bioabsorbable Interference Screw: A Case Report and Review of the Literature Sun, 15 Oct 2017 00:00:00 +0000 Osteomyelitis following arthroscopically assisted anterior cruciate ligament (ACL) reconstruction has rarely been reported in the literature. We report a case of a 20-year-old female who had delayed tibial osteomyelitis and a pretibial cyst with culture-positive, oxacillin sensitive Staphylococcus epidermidis 15 months after an ACL reconstruction with hamstring autograft. Soft tissue fixation within the tibial tunnel was with a poly-L-D-lactic acid (PLDLA) bioabsorbable interference screw. The patient underwent surgical treatment with curettage, debridement, hardware removal, and bone grafting of the tibial tunnel followed by a course of intravenous antibiotics. Arthroscopic evaluation demonstrated an intact ACL graft without any evidence of intra-articular infection. The patient returned to collegiate athletics without any complications. While the most common biologic complications include pretibial cysts, granuloma formation, tunnel widening, and inflammatory reactions, infection is exceedingly rare. Late infection and osteomyelitis are also rare but can occur and should be considered in the differential diagnosis. Kevin S. Weiss, Justin M. Weatherall, Jen Eick, and James R. Ross Copyright © 2017 Kevin S. Weiss et al. All rights reserved. Spontaneous Bilateral Sternoclavicular Joint Septic Arthritis and Lumbar Discitis: An Unusual Case in a Healthy Adult Mon, 09 Oct 2017 07:17:33 +0000 Introduction. Septic arthritis of the sternoclavicular (SC) joint is a rare condition. Typically, it presents in patients with risk of infection and is usually unilateral. In this report, we describe a case of spontaneous bilateral sternoclavicular joint infection of an otherwise healthy adult. Case Presentation. A 67-year-old man presented in our hospital complaining of 2-week history of neck and chest pain which was radiating to his shoulders bilaterally. Clinical examination revealed erythema and swelling of the sternoclavicular area. Inflammatory markers were raised. Image investigation with CT and MRI was undertaken and verified the presence of bilateral sternoclavicular joint infection. The patient received prolonged course of intravenous antibiotics since his admission. The patient was discharged in a good condition and followed up in clinic. Conclusion. High index of clinical suspicion of SC joint infection is important for early diagnosis to avoid further complications. Georgios Mamarelis, Mohammad Zain Sohail, Athanasios Mamarelis, Hassan Fawi, and Jehangir Mahaluxmivala Copyright © 2017 Georgios Mamarelis et al. All rights reserved. Successful Pelvic Resection for Acetabular Hydatidosis Mon, 09 Oct 2017 00:00:00 +0000 Background. Hydatidosis of the bone is a rare occurrence (0.9 to 2.5% of all localization of the disease). In those occurrences, the pelvic bone is the second most frequent localization. Curative treatment of pelvic bone hydatidosis is difficult and a consensus is yet to be found. Clinical Case. We report a case of hydatidosis of the ischium, extended to the homolateral hip. The patient was treated through hip resection using patient-specific cutting guides, followed by total hip reconstruction. Albendazole was administered to the patient for two months before the surgery and for three months following the surgery. Conclusions. In a young patient, hydatidosis of the pelvic bone can be treated with satisfying results through wide resection of the hip coupled with an antiparasitic treatment administered before and after the surgery. Prosthetic reconstruction, similar to what is done in cancer surgery, restores good functions. Canoville Daniel, Hannebicque Matthieu, Rochcongar Goulven, Michon Jocelyn, Dumaine Valérie, and Hulet Christophe Copyright © 2017 Canoville Daniel et al. All rights reserved. Radiofrequency-Targeted Vertebral Augmentation: Case Report of a Patient with 7 Osteoporotic Vertebral Fractures in a Variant of Osteogenesis Imperfecta Wed, 04 Oct 2017 07:10:06 +0000 Introduction. Radiofrequency-targeted vertebral augmentation (RF-TVA) is a recognized treatment for painful compression fractures. RF-TVA in a patient with multiple compression fractures due to type I osteogenesis imperfecta (OI) has not been previously reported. Case Presentation. A 54-year-old patient with type I OI is presented with a segmental thoracic hyperkyphosis and 7 recent vertebral compression fractures. Because of persistent severe thoracolumbar back pain despite conservative therapy, RF-TVA was indicated. Nocturnal back pain was almost completely relieved at all postoperative time points evaluated. However, overall pain relief dropped only slightly from 7 to 5 on the numerical rating scale (NRS) at the 6-week follow-up, and there was only a small decrease in the Oswestry Disability Index (ODI) from 72% to 63%. An MRI at the 3-month follow-up revealed hyperintensity at levels T11 and T12, indicating slight recollapsing. At the 6-month follow-up, the ODI improved to 55%, although overall pain had worsened to 6 on the NRS. Pain at rest remained at a very low level. Conclusion. Despite the remaining lumbago, RF-TVA may be a good option for patients with OI who have multiple fractures. However, fractures at multiple levels and segmental thoracic hyperkyphosis may increase the risk for recollapsing and ongoing pain. Leonard Westermann, Peer Eysel, Marvin Simons, and Kourosh Zarghooni Copyright © 2017 Leonard Westermann et al. All rights reserved. Usefulness of Sacral Sublaminar Wire for Low Transverse Sacral Fractures: Two Cases’ Report Wed, 04 Oct 2017 00:00:00 +0000 Low transverse sacral fractures are rare, with only two published reports regarding their surgery. The complication associated with surgery for sacral fractures is the prominence of implants. In addition, screw fixation below S3 is impractical. We performed posterior sacral fixation using S2 alar iliac (S2AI) screws and sacral sublaminar wires for low transverse sacral fractures. Case 1 was 65-year-old male with an S2-3 transverse sacral fracture. We performed laminectomy (S2-3) and passed ultrahigh molecular weight polyethylene (UHMWPE) cables from laminectomy area to the third posterior sacral foramina. We inserted S2AI screws and connected rods. We also tightened the UHMWPE cables. The implants did not protrude into skin. One year after surgery, the sacral fracture healed without any displacement. Case 2 was a 42-year-old female with an S2 transverse sacral fracture. We performed laminectomy (S1–3) and passed UHMWPE cables from laminectomy area to the third and fourth posterior sacral foramina. We inserted S1 pedicular screws and S2AI screws and connected rods. We also tightened UHMWPE cables. The implants did not protrude into skin. One year after surgery, the sacral fracture healed without any displacement. We consider sacral sublaminar wires to be useful bone anchors in lower sacrum. Tatsuro Sasaji, Hideki Imaizumi, and Taishi Murakami Copyright © 2017 Tatsuro Sasaji et al. All rights reserved. Natural Remission of Major Periprosthetic Osteolysis following Total Hip Arthroplasty with Metal-on-Metal Bearings Wed, 04 Oct 2017 00:00:00 +0000 The natural course of adverse events following the use of metal-on-metal (MoM) bearings in total hip arthroplasty (THA) is not well known. In this article, we report the case of a patient with asymptomatic major acetabular osteolysis following MoM THA that diminished gradually without any surgical intervention. A 58-year-old male underwent one-stage bilateral MoM THA for bilateral osteoarthritis. Four years after THA, major acetabular osteolysis developed in his right hip without any local or systemic symptoms. The patient underwent a careful radiographic and clinical observation without any surgical intervention because he did not want to undergo revision surgery. The lesion gradually diminished after 7 years, and most of the osteolytic area was replaced by newly formed bone at 10 years. He continues to be followed with no evidence of cup loosening or migration. Our observation suggests that a periprosthetic osteolytic change related to the use of MoM bearings has the potential for natural remission. Tatsuya Tamaki and Kazuhiro Oinuma Copyright © 2017 Tatsuya Tamaki and Kazuhiro Oinuma. All rights reserved.