Case Report
Tar Barreler’s Hump: An Unusual Presentation of a Posttraumatic Pseudolipoma
Table 1
Summary table: posttraumatic pseudolipoma (PTL).
| Etiology | Sequelae of acute, chronic, or repetitive trauma. Various mechanisms of development are postulated | Incidence | ~1% | Gender ratio | F : M = 3.8: 1* | Age | 18–64 years* | Risk factors | Acute/chronic/repetitive trauma | | Conservative | Treatment | Liposuction | | Surgical excision | Prognosis | Unknown. Malignant transformation has never been reported |
Imaging | US—well-delineated hyperechoic subcutaneous mass, no posterior acoustic attenuation or enhancement | CT—subcutaneous mass with Hounsfield attenuation of fat | MRI—homogenous unencapsulated mass isointense to fat on all sequences | T1WI-hyperintense (similar to fat) | Fat-suppressed sequence—hypointense (similar to fat) | Lack of a well-defined low signal intensity fibrous capsule | Lack of enhancement following administration of intravenous contrast |
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*Based on a review of 124 cases of PTLs by Galea et al. [1].
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