A Case of Lung Tumorlets Secondary to Pulmonary Hypoplasia with Recurrent Haemoptysis

Most patients with lung tumorlets are usually asymptomatic, and most diagnoses are incidental findings during microscopic lung examinations at autopsy or after excision of a tissue lesion. A 73-year-old woman was admitted to our hospital due to recurrent haemoptysis. Chest computed tomography demonstrated right inferior lobe collapse with bronchiectasis. Bronchoscopic examination revealed the right inferior lobar bronchus to be filled with blood clots. Haemoptysis persisted even after two arterial embolization trials and occlusion with endobronchial Watanabe spigot. Therefore, right lower lobectomy was performed, and multiple tumorlets on lobar hypoplasia were observed on histopathological examination of the excised specimen. We believe that the haemoptysis in our patient was possibly caused by the lung tumorlets secondary to lobar hypoplasia.