Huge deep fibrous histiocytoma arising from the sigmoid mesocolon

Abstract

Summary Benign fibrous histiocytoma is one of the most common mesenchymal neoplasms of the skin, but it rarely occurs in deep soft tissues. Deep fibrous histiocytoma commonly occurs in the lower limbs or the head and neck region. We report an extremely rare case of deep fibrous histiocytoma arising from the sigmoid mesocolon. A 63-year-old woman initially presented with lower abdominal pain. An image study showed a huge heterogeneous pelvic mass with bleeding. The patient was treated successfully by surgery. We review the literature and discuss the clinical presentation, diagnosis, and management of deep fibrous histiocytoma.