title: Rounded atelectasis formation following decrease of pleural effusion: a case report.
abstract: We present a case of rounded atelectasis (RA) observed continuously following decrease of pleural effusion. The collapsed right lower lobe adjacent to pleural effusion changed its shape from wedge-shaped consolidation with air-bronchogram to oval and flat formation at last. The vessels and bronchi curving into RA were detected by CT and we called it horizontal comettail sign. When a mass is detected following decrease of pleural effusion and vessels and bronchi are curving into the mass, the mass may be diagnosed as RA and no further examination may be necessary.
authors.affiliation: Department of Radiology, Kagawa Medical University, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sasaki
authors.forename: K
authors.initials: K
authors.lastname: Satoh
authors.forename: K
authors.initials: K
authors.lastname: Fukunaga
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: N
authors.initials: N
authors.lastname: Kimura
authors.forename: N
authors.initials: N
authors.lastname: Fujiwara
authors.forename: T
authors.initials: T
authors.lastname: Kobayashi
authors.forename: Y
authors.initials: Y
authors.lastname: Kawase
authors.forename: H
authors.initials: H
authors.lastname: Takashima
authors.forename: M
authors.initials: M
authors.lastname: Ohkawa
authors.forename: M
authors.initials: M
authors.lastname: Tanabe
authors.forename: Y
authors.initials: Y
authors.lastname: Hitani
mesh_terms: D001995:Bronchography; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010994:Pleura / Q000000981:diagnostic imaging; D010996:Pleural Effusion / Q000000981:diagnostic imaging*; D001261:Pulmonary Atelectasis / Q000000981:diagnostic imaging*; D012075:Remission, Spontaneous; D014057:Tomography, X-Ray Computed