title: Pulmonary histiocytosis X: comparison of radiographic and CT findings.
abstract: The authors retrospectively evaluated radiographs, computed tomographic (CT) scans, and results of pulmonary function tests (when available) for 17 patients with biopsy-proved pulmonary histiocytosis X. In 11 patients, high-resolution CT was used. In 12 patients, CT demonstrated cystic air spaces, usually less than 10 mm in diameter. In three of these 12, cysts were the only abnormality, but in six others, nodules (usually less than 5 mm in diameter) were also present. Two patients had only nodules and one, only emphysema. CT showed that many lesions that appeared reticular on plain radiographs were actually cysts. CT showed no central or peripheral concentration of lesions, but it did reveal that many small nodules were distributed in the centers of secondary lobules around small airways. CT findings correlated better with the diffusing capacity (rho = -0.71) than did the plain radiographic findings (rho = -0.57). Thus, CT was better than radiography at showing the morphology and distribution of lung abnormalities.
authors: Department of Radiology, University of Washington, Seattle 98195.
authors: A D
authors: AD
authors: Moore
authors: J D
authors: JD
authors: Godwin
authors: N L
authors: NL
authors: Müller
authors: D P
authors: DP
authors: Naidich
authors: S P
authors: SP
authors: Hammar
authors: D L
authors: DL
authors: Buschman
authors: J E
authors: JE
authors: Takasugi
authors: C R
authors: CR
authors: de Carvalho
mesh_terms: D000328:Adult; D005260:Female; D006646:Histiocytosis, Langerhans-Cell / Q000000981:diagnostic imaging*; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging; D008171:Lung Diseases / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed