Primary pulmonary malignant melanoma: Case report and literature review.

Primary malignant melanoma of the lung is an extremely rare pulmonary carcinoma. Only 45 cases have been reported in the literature. Herein, we report a case of a 46-year-old male patient with an O Rh negative blood type who presented with pulmonary bronchial symptoms and underwent lobectomy. Genetic testing was also performed but no targetable mutations were found, and the patient's PD-L1 RNA level was low. He developed brain metastasis four months after surgery and received radiotherapy but died 21 months after diagnosis. We review the published cases of this rare pulmonary lesion.