title: Mesenchymal cystic hamartoma presenting with spontaneous pneumothorax.
abstract: A 53-year-old woman presented with a spontaneous right-sided pneumothorax. Computed tomography chest scan demonstrated a large bulla involving the right middle lobe. Recurrence of the pneumothorax after initial closed chest tube drainage necessitated thoracotomy and wedge resection. Histopathological examination revealed features consistent with a benign mesenchymal cystic hamartoma. Pneumothorax is a recognized complication of mesenchymal cystic hamartoma, a lesion that also has malignant potential.
authors.affiliation: Department of Medicine, Royal Columbian Hospital, New Westminster, British Columbia.
authors.forename: J
authors.initials: J
authors.lastname: Glezos
authors.forename: D
authors.initials: D
authors.lastname: Toppin
authors.forename: T
authors.initials: T
authors.lastname: Cooney
mesh_terms: D005260:Female; D006222:Hamartoma / Q000150:complications* / Q000473:pathology; D006801:Humans; D008171:Lung Diseases / Q000150:complications* / Q000473:pathology; D008875:Middle Aged; D011030:Pneumothorax / Q000150:complications*