Table 1 Summary table of hibernomas
From: Hibernoma – two patients with a rare lipoid soft-tissue tumour
Aetiology | Unclear, deletion respectively reciprocal translocation of chromosome 11 |
Incidence | Approximately 1.6% of all benign lipomatous tumours |
Gender distribution | Slight male predominance |
Average age | 3rd to 4th decade of life |
Risk factors | Not known |
Therapy | Complete excision of symptomatic hibernoma or unclear diagnosis |
Prognosis | Benign tumour without malignant transformation or metastatic spread |
No recurrence after complete excision, possible recurrence in cases of incomplete excision | |
Imaging characteristics | Well-defined, richly vascularized soft tissue tumour with a density between subcutaneous fat and skeletal muscle in CT, respectively slightly hypointense to subcutaneous fat in T1w and T2w MR images, hyperintense in TIRM, heterogenous to homogenous enhancement, high 18 F-FDG uptake and change of FDG avidity in follow-up |