When Sarcomas Mimic Lymphomas: A BCOR-Rearranged Sarcoma Case Report.

This case report describes the diagnostic and therapeutic challenges faced in managing an elderly diabetic man with BCOR-rearranged sarcoma, a rare, aggressive malignancy. The patient presented with neck swelling, initially suspected to be a high-grade lymphoma but later found to be undifferentiated small round cell sarcoma. Further investigations with PET-CT revealed a mass in the lower abdomen, leading us to reconsider the prior diagnosis of non-Hodgkins' lymphoma.