title: [Reversible pulmonary hypoperfusion following proximal bronchial obstruction caused by a benign process].
abstract: Obstruction of a major bronchus by a benign lesion can be accompanied by a functional reduction of the perfusion of the distal lung. This disorder is reversible after removal of the obstruction. We present 5 cases of obstruction of a main bronchus with functional exclusion of the affected lung on scintigraphy. The obstructing lesion was carcinoid tumour in 4 cases and a plasmocytic granuloma in another case. The perfusion was found to be restored following the operation (one bronchotomy, three isolated resection-anastomoses and one resection-anastomosis with lobectomy). These disorders are due to reflex phenomena and anatomical modifications related to the trapping effect. These phenomena are revealed by plain chest x-rays and by perfusion and ventilation pulmonary scintigraphy.
mesh_terms: D000328:Adult; D000402:Airway Obstruction / Q000209:etiology*; D001982:Bronchial Diseases / Q000150:complications*; D001984:Bronchial Neoplasms / Q000150:complications*; D002276:Carcinoid Tumor / Q000150:complications*; D005260:Female; D005500:Follow-Up Studies; D006099:Granuloma / Q000150:complications*; D006104:Granuloma, Plasma Cell / Q000150:complications*; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging; D008875:Middle Aged; D011652:Pulmonary Circulation; D011877:Radionuclide Imaging
vernacular_title: Hypoperfusion pulmonaire réversible secondaire à l'obstruction d'une bronche proximale par un processus bénin.