Search
hibernoma
rare benign adipose tissue neoplasm composed in part of brown fat cells
Clinical manifestations:
- slow growing
- ~10% intramuscular
Microscopic Pathology:
- variable numbers of polygonal brown fat cells
- small capillary proliferation
- stromal background
- multivacuolated lipoblast-like cells often seen
- variants: myxoid variant (myxoid stroma) spindle cell variant (spindle cells, thick collagen, mast cells)
- mitoses exceptional
- cytologic atypia unusual
Immunophenotype: S100 variable, sometimes strongly positive
General
adipose tissue neoplasm
References
- WHO Classification Tumours of Soft Tissue and Bone
Fletcher, Unni & Mertens Eds. IARC Press 2002