Treatment of giant benign fibrous histiocytoma of the forelimb in a Husky cross breed dog

Presented case was an eight-year-old, male husky cross dog. According to the owner’s history, several months earlier, a drug had been injected into the left forelimb, after which localized swelling developed and progressed to an open wound. Although the wound was treated conservatively for an extended period, the swelling continued to enlarge. Clinical examination revealed a large-volume mass with a firm to slightly compressible consistency encompassing the entire left forelimb. Following medical therapy to control the underlying tissue infection, the entire mass was surgically excised. The resulting defect was closed using the remaining healthy skin. The dog achieved full recovery within 10 days postoperatively. Histopathological examination of the excised tissue confirmed a diagnosis of benign fibrous histiocytoma (BFH). BFH is a benign neoplasm composed of a mixture of fibroblastic and histiocytic cells. It most commonly occurs in the dermis but can also be found sporadically in soft tissues and parenchymal organs. In this case, a large, infected soft tissue tumor was successfully removed, and the wound healed without complications. To our knowledge, no prior reports have described a benign fibrous histiocytoma of such volume, with concurrent secondary infection and open wound formation, affecting an elderly dog’s limb. Therefore, this case is considered to contribute novel information to existing veterinary literature.