Skin and deep soft tissue with a keratinized stratified squamous epithelium overlying a dermis containing preserved adnexal structures. The underlying stroma is replaced by dense, disorganized collagenous fibrosis and proliferative granulation tissue, characterized by numerous small-caliber blood vessels. Marked chronic inflammatory infiltrate, composed primarily of lymphocytes and plasma cells, permeates the fibrovascular tissue. Deeper regions exhibit focal areas of ischaemic-type necrosis and fibrinous exudate, consistent with the clinical "dirty tissues" and the presence of a chronic sinus tract. No evidence of specific granulomas. No evidence of atypia or malignancy.
History of chronic left foot infection and osteomyelitis, previously managed with debridement, underwent a left leg amputation. Histopathological evaluation was requested for the amputated bone and associated 'dirty' (necrotic/infected) soft tissues to confirm the extent of the infectious and degenerative process.
Soft tissue fragments collectively measured 2.5x2.2x1 cm, totally embedded.
Specimen (fragments from Left Leg Amputation):