Diagnosis of B‐cell lymphoma from gluteal muscle mass

Abstract

A 46‐year‐old man was with a very large mass in his right gluteal muscle and he complained about difficulty in mobility. Incisional biopsy reported a lipomatous lesion; however, clinical presentation was in the favor of muscle sarcoma. Histological analysis after mass excision confirmed the diagnosis of diffuse large B‐cell lymphoma.

Primary multifocal muscular T‐cell lymphoma with cutaneous involvement in a dog: A case report and review of the literature

“…[10][11][12] Primary skeletal muscle lymphoma is also a very rare neoplasia of people, accounting for only 0.5% of all extranodal lymphomas, with most cases usually being B-cell or non-Hodgkin's lymphoma. 13,14 This contrasts with the current case and three previously reported canine cases, two of which were T cell (one anaplastic large T-cell lymphoma and one low-grade T-cell lymphoma). 3,4 The most commonly affected muscles are the muscles of the extremities, [14][15][16] which has also been noted in the canine cases.…”

“…10 The pathogenesis of primary muscular lymphoma is unknown. Human skeletal muscle lymphoma tends to occur in the lower extremities, and one proposed explanation for this could be that the extremities are more prone to injuries, with human primary muscular lymphoma reported after soft tissue injury, 18 at drug injection sites, 13 and associated with the chronic inflammation of infections or immunemediated diseases. 12 In the current case, there was no history of trauma; however, an intravenous cannula had been placed in the right thoracic limb 3 days before the onset of lameness and swelling of the same shoulder, and the patient had undergone a dental procedure for severe periodontal disease, with multiple areas of abscessation and 21 dental extractions.…”