Benign fibrous histiocytoma of the renal capsule.
The first case of benign fibrous histiocytoma of the renal capsule is reported in a male aged 44 years. The tumor had its point of origin in the renal capsule. Histologically, the tumor was composed of intersecting fascicles of fibroblastic cells forming a loose crisscross or "storiform" pattern. Electron microscopic studies of tumor cells revealed intermediate filaments and membrane-bound collagen fibers which continued to extracellular collagen bundles. This deep seated fibrous histiocytoma had a more prominent storiform pattern and fewer secondary elements such as xanthoma cells than cutaneous ones.
Kobayashi
S
S
Department of Pathology, Kagawa Medical School, Japan.
Yamadori
I
I
Ohmori
M
M
Akaeda
T
T
D000328:Adult; D018219:Histiocytoma, Benign Fibrous / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D007672:Kidney Cortex; D007680:Kidney Neoplasms / Q000473:pathology*; D008297:Male; D008854:Microscopy, Electron; D009392:Nephrectomy