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Primary pulmonary NK/T-cell lymphoma: A case report and literature review.

Extranodal natural killer (NK)/T-cell lymphoma (ENKTL) is an aggressive disease with poor prognosis. The lung is a relatively rare site of involvement. The current study presents a case of primary pulmonary ENKTL with fever and dyspnea, mimicking pneumonia and initially treated with empirical antibiotics. The patient demonstrated rapid deterioration and died shortly following diagnosis. To the best of our knowledge, large-scale investigations referring to primary pulmonary ENKTL are not available. As a result, the exact incidence and clinical features of primary pulmonary ENKTL are unknown. In the current report, a literature review is presented to discuss the clinical characteristics, diagnosis, treatment, and prognosis factors of this malignant disease.