title: Pulmonary alveolar microlithiasis: a case report with emphasis on imaging findings.
abstract: Pulmonary alveolar microlithiasis (PAM) is a rare disease characterized by the presence of small calculi in the alveolar space. The authors report a case of a 21-year-old man with a 2-year history of shortness of breath on exertion and dry cough. Physical examination was altered only for crackles at auscultation. Pulmonary function revealed a mild restrictive ventilatory defect and the chest radiograph demonstrated paracardiac confluence of dense micronodular infiltrate. High-resolution CT scan revealed diffuse ground glass attenuation and septal thickening, more pronounced in lower pulmonary regions, with calcifications along the interlobar septa and subpleural regions. A transbronchial lung biopsy confirmed the diagnosis of PAM.
authors.affiliation: Department of Radiology, Rio de Janeiro Federal University, CEP 21941.913, Rio de Janeiro, Brazil.
authors.forename: Guilherme
authors.initials: G
authors.lastname: Abdalla
authors.forename: Edson
authors.initials: E
authors.lastname: Marchiori
authors.forename: Gláucia
authors.initials: G
authors.lastname: Zanetti
authors.forename: Antonio
authors.initials: A
authors.lastname: Mucillo
authors.forename: Mariana Leite
authors.initials: ML
authors.lastname: Pereira
authors.forename: Nina
authors.initials: N
authors.lastname: Ventura
authors.forename: Pedro
authors.initials: P
authors.lastname: Martins
authors.forename: Carolina Pesce Lamas
authors.initials: CP
authors.lastname: Constantino
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Canellas
authors.forename: Viviane
authors.initials: V
authors.lastname: Brandão
authors.forename: Romulo
authors.initials: R
authors.lastname: Varella de Oliveira