title: Unilateral expiratory airflow obstruction during forced exhalation.
abstract: We present a case of unilateral airflow obstruction during forced exhalations. The patient presented with episodic dyspnea and wheezing, particularly when he lay in the right lateral decubitus position. Spirometry revealed symmetric, marked reductions in forced expiratory volume in the first second and forced vital capacity values, while plethysmography demonstrated a near-normal total lung capacity. Bronchoscopy revealed a polypoid lesion in the right main bronchus, of which biopsy specimens demonstrated adenoid cystic carcinoma. Following a right pneumonectomy, total lung capacity was markedly reduced; interestingly, however, spirometry was essentially unchanged. This case is an elegant illustration of the effects of respiratory maneuvers and body position on airway caliber.
authors.affiliation: Division of Pulmonary and Critical Care Medicine, Edward Hines Jr Veterans Affairs Hospital, Illinois 60141, USA.
authors.forename: Umur
authors.initials: U
authors.lastname: Hatipoglu
authors.forename: Franco
authors.initials: F
authors.lastname: Laghi
authors.forename: Steven E
authors.initials: SE
authors.lastname: Cattapan
authors.forename: Arcot J
authors.initials: AJ
authors.lastname: Chandrasekhar
mesh_terms: D000402:Airway Obstruction / Q000209:etiology* / Q000503:physiopathology; D001999:Bronchoscopy; D003528:Carcinoma, Adenoid Cystic / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D008175:Lung Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011187:Posture; D013147:Spirometry; D014109:Total Lung Capacity