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.