A case report of extranodal NK/T-cell lymphoma in patient with chronic lymphocytic leukemia.

Rationale:Chronic lymphocytic leukemia often results in secondary tumors, the most common being large B cell lymphoma known as Richter syndrome, followed by extranodal NK/T-cell lymphoma (nasal type) is extremely rare.Patient concerns:A chronic lymphocytic leukemia patient presented with nasal congestion.Diagnoses:Nasal endoscopy identified a left nasal mass, and the pathology suggested extranodal NK/T-cell lymphoma (nasal type).Interventions:The patient received a course of chemotherapy.Outcomes:Pneumonia and coagulopathy occurred after chemotherapy, and the patient died shortly thereafter.Lessons:It is essential to recognize the transformation of disease earlier in chronic lymphoblastic leukemia patient.