Extranodal natural killer/T-cell lymphoma with secondary haemophagocytic lymphohistiocytosis simulating orbital inflammatory disease

This case report describes an uncommon case of periorbital swelling due to a rare neoplastic condition, a natural killer/T-cell lymphoma, which presented a significant diagnostic challenge. The malignancy was complicated by hemophagocytic lymphohistiocytosis that led to mortality within a month of initial presentation.