Primary epithelioid trophoblastic tumor of the lung.

A 40-year-old woman presented to our institution with abnormal uterine bleeding, elevated β-human chorionic gonadotropin levels, and a mass in the left lower lobe of her lung. She underwent a thoracoscopic lobectomy after further staging and workup revealed no other abnormalities. Pathologic examination of the lung mass revealed an epithelioid trophoblastic tumor. In patients with elevated β-human chorionic gonadotropin levels, a lung mass, and a negative gynecologic examination, primary epithelioid trophoblastic tumor of the lung should be considered.