Forearm-Wrist Hibernoma: A Rare Benign Tumour of Brown Fatty Tissue

Objectiveto reveal the magnetic resonance imaging findings ofhibernoma which is rarely seen benign brown fat tissuetumour, usually seen in adults, that develops from fetal fattissue residues.case14-year-old female who noticed for the last 1 monthimmobilized soft tissue mass in her left wrist admitted tothe orthopedic polyclinic. there was no pain. there was nocirculatory problem or neurological deficit in this extremity.after that patient was referred radiology department.magnetic resonance imaging was performed. on postcontrastt1 weighted fat-suppressed sequence, lesion showedhomogeneous contrast enhancement (unlike lipoma) andthere was a small hypointense area on central part of thelesion which demonstrates fat tissue. patient was operated.histopathological diagnosis was hibernoma.conclusionhibernoma should be considered in patients with immobilizedsoft tissue mass without significant symptom on the forearmwrist.