title: Reexamination of histological findings of ileal sarcomas induced in rats given diet containing bracken fern.
abstract: The ileal sarcomas induced in rats given diet containing bracken fern were examined microscopically and electron microscopically. These ileal sarcomas, which were induced at high incidence (80%-44%), have previously been identified as spindle cell fibrosarcomas. However, studies showed that they should be diagnosed as malignant fibrous histiocytomas (MFH) being classified into the following four histological types; fibrous, pleomorphic, giant cell and myxoid type. No types of sarcomas other than MFH were found in the ileum.
mesh_terms: D000818:Animals; D005260:Female; D005354:Fibrosarcoma / Q000473:pathology; D018219:Histiocytoma, Benign Fibrous / Q000473:pathology; D007078:Ileal Neoplasms / Q000473:pathology*; D008854:Microscopy, Electron; D051381:Rats; D011919:Rats, Inbred Strains; D012513:Sarcoma, Experimental / Q000473:pathology*