Pulmonary adenocarcinoma presenting with penile metastasis: a case report.

Introduction: Penile metastases are an extremely rare occurrence, and most primary malignancies are located in the urinary bladder, prostate, rectum, and rectosigmoid. Although very few cases of penile metastases have been reported, those of lung cancer as the primary tumor are very rare. Among the latter, squamous cell carcinomas constitute the majority, whereas adenocarcinomas are almost exceptions.