Table 1.

Summary table of hibernomas

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