Abstract
Hibemoma is a rare benign soft tissue tumor derived from brown fat.The tumor is also known as "fetal lipoma, lipoma of embryogenic fat and lipoma of immature adipose tissue. Hibemomas are slow-growing, painless soft tissue tumors which do not recur after surgical resection. Preferred locations are brown fat containing sites as thigh, interscapular region, shoulder, axilla, and mediastinum.The tumor occurs most commonly in adults, with a mean age of 38 years (age range, 2-75 years). We present a rare case of hibernoma with radiological and pathological findings.
Highlights
Hibernoma is a rare benign soft tissue tumor derived from brown fat
A 23-year-old man was referred to our department because of painless, slow-growing soft tissue mass located in the left chest wall
Multivacuolar adipocytes and brown fat cells with granular eosinophilic cytoplasm are interspersed with univacuolar adipocytes
Summary
Hibernoma is a rare benign soft tissue tumor derived from brown fat. The tumor is known as “fetal lipoma, lipoma of embryogenic fat and lipoma of immature adipose tissue. A 23-year-old man was referred to our department because of painless, slow-growing soft tissue mass located in the left chest wall. The lesion was rubbery and slightly mobile on physical examination. The average density of the lesion was measured –60 HU similar that of the subcutaneous fat tissue. Lesion is isointense to the invasion to the adjacent soft tissues and bone is seen.
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