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| Author | Investigations | Surgical procedure | Histopathology | Outcome |
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| Rasch and Strange [8] | Barium enema: smooth deformity of the inferomedial border of the cecum with pressure on the terminal ileum | Exploratory laparotomy and right hemicolectomy | Cecal wall thickened with connective and muscular tissue
Large amounts of mucous material, occurring in lakes of considerable size
Fibrosis and occasional groups of normal mucus secreting cells | Discharged after 2 weeks |
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| Ozgür et al. [6] | CT abdomen (hypoattenuating, 10∗9∗8 cm mass lying in the retrocecal region)
US abdomen 10 × 9 × 8 cm mass with multiple echogenic layers in a wavy pattern filling the entire lesion, with thin but smooth wall | Exploratory laparotomy (9 × 7 × 3 cm mass and a fixed tumor adherent to the abdominal wall, posterior to the cecum
Right hemicolectomy | Firm mass of 9 × 7 × 1.5 cm near the ileocecal region
Normal colonic mucosa papillary projections of the mucinous adenocarcinoma lining the appendiceal mucosa | No follow-up |
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| Cama Jitoko K [21] | US scan: normal | Diagnostic laparoscopy cystic lesion arising from the base of the stump of appendix
3 × 2 cm, excised laparoscopically | Periappendicitis with chronic inflammation and fibrosis | No follow-up |
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| El Ajmi M, 2009 [10] | US scan: hypoechogenic mass 90 × 65 × 55 mm
CT: retroperitoneal cystic structure measuring 13 × 58 cm, without mural calcification | Laparotomy
Retroperitoneal cystic mass right ileocecal resection with sufficient margins | Mucinous cystadenoma of the appendiceal stump
Five lymph nodes examined were free from the tumor
Margins of resection and cytology were negative | Discharge on the 4th postoperative day |
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| Kim et al. [1] | Doppler US : a well-defined lobulated mass (10∗6∗30 cm) in the right lower abdomen extending into the right upper thigh
CT : elongated, cystic mass in the extraperitoneal space of the right lower quadrant extending into the right thigh along the right femoral canal, indenting medial aspect and possibly originating from the cecum (i.e., the expected location of the appendix) | Two separate incisions, the cecum, terminal ileum, and a portion of the mass above the right femoral canal were removed with an ileocolostomy
Mass below the right femoral canal was removed separately | Mucinous cystadenoma | No evidence of recurrence 3 years after surgery |
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| Sameera and Sohil [11] | Ultrasound: 6 cm cystic lesion around the inferior pole of the right kidney CT
No lesion in kidney but a tubular cystic structure in the right flank with inferior tip at the same site of previously inflamed appendix stump base, mucocele of stump | Exploratory laparotomy and mucocele resected | Benign mucinous cystadenoma | The patient was discharged well |
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| Korkolis et al. [3] | CT : elliptical, 7 × 5 cm cystic mass, lying at the inferior aspect of the cecum; the lesion had smooth walls, scattered mural calcifications, and no surrounding inflammation | Exploratory laparotomy, well-encapsulated and calcified tumor, 8 × 5.5 × 4 cm in size, at the base of originating from the one cm, unburied, appendiceal stump
Limited cecal resection with the mass | Histopathology revealed crowded, villotubular structures, with mild to moderate epithelial atypia together with acellular mucin pooling (75 ml mucin)
No evidence of malignancy
Appendiceal stump mucocele associated with a benign mucinous cystadenoma | Discharged home on the fifth postoperative day
18 months after surgery, free of symptoms
No recurrence |
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| Lien et al. [2] | US : dumbbell-shaped, heterogeneous cystic mass with internal echoes, 5 × 5 cm in diameter in the right lower abdomen
CT demonstrated a cystic mass at the inferior aspect of the cecum | Right hemicolectomy; an 8.3∗ 6∗3.5 cm dumbbell-shaped tumor containing yellowish mucus originating from the 1 cm unburied appendiceal stump | Mucinous cystadenoma | Uneventful postoperative course
No recurrence at 2 years |
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| Lien et al. [2] | US showed an elongated cystic mass with internal echoes
CT : well-defined cystic lesion without surrounding inflammation adjacent to the cecum and displacing the terminal ileum | The patient refused surgical intervention | None | She has remained well during the subsequent 4 years |
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| Yeong, [16] | CT : intraperitoneal cystic mass in the right upper quadrant with peripheral calcification | Laparotomy
Mass adherent to terminal ileum, cecum, and ascending colon
The right iliac fossa contained scattered grey, mucoid nodules up to 0.4 cm in diameter
Cyst not separated from the colon
Right hemicolectomy | Mucocele due to a papillary cystadenocarcinoma arising in an appendiceal stump and associated with peritoneal metastases | Not mentioned |
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