Recurrence of Pulmonary Arteriovenous Malformation with Non-tuberculous Mycobacteria Infection Caused by Perfusion from the Pulmonary Artery and Bronchial Artery after Coil Embolization.

Recurrence of an embolized pulmonary arteriovenous malformation (PAVM) is common after coil embolization. A 23-year-old woman who had undergone multiple instances of transcatheter coil embolization was admitted with hypoxia and hemoptysis. A PAVM in the left S6 was found to be recanalized by reperfusion through the pulmonary and bronchial arteries. The left S6 was partially resected; the specimen contained necrotic granulomas and non-tuberculous mycobacteria (NTM) around the PAVM. Clinicians should consider possible recurrence of PAVM after reperfusion of the pulmonary and bronchial arteries, as well as the risk of NTM infection during follow-up of patients who have undergone repeated coil embolization.

Pulmonary Endometriosis which Probably Occurred through Hematogenous Metastasis after Artificial Abortion.

Pulmonary endometriosis (PEM) is a rare disease characterized by the proliferation of ectopic endometrial tissue in the lungs, which presents as catamenial hemoptysis. A 20-year-old-woman was admitted for repeated hemoptysis. Chest CT revealed a ground-glass opacity that appeared consistently with her menstrual cycle. Our detailed inquiry revealed a history of artificial abortion, which was followed by the use of oral contraceptives and catamenial hemoptysis after the discontinuation of these medications. Surgical removal was performed and histopathological examinations confirmed PEM. This clinical course suggested hematogenous metastasis. An inquiry regarding the patient's history of uterine procedures and use of oral contraceptives was suggestive for the diagnosis of this disease.