Sections examined shows dense infiltration by neutrophils, lymphocytes, plasma cells and macrophages. There are related areas of fat necrosis and fibrosis with overlying partially ulcerated skin surface. Picture is consistent with chronic suppurative inflammation. No evidence of specific granulomas. No evidence of malignancy.
Bleeding per rectum, anal mass.
Soft tissue fragments collectively measured 2.3x1.8x0.6 cm, totally embedded.
Anal mass, excision biopsy: