title: [Early image of squamous cell carcinoma in the peripheral lung field on high-resolution CT scan].
abstract: A 65-year-old man presented with the shadow of an abnormal nodule in the left lower lung field in a chest radiograph. We diagnosed this as an old inflammatory change because prior chest radiographs had shown the same nodule in the same lung field. However, a high-resolution CT scan showed a hazy ground-glass opacity (GGO) near the nodule. Two years later, this GGO changed into a small nodule. After a CT-guided transbronchial lung biopsy performed by ultra-thin fiberoptic bronchoscopy, we diagnosed this nodule as squamous cell carcinoma. We speculated that the hazy GGO detected in the peripheral lung field on high-resolution CT two years before diagnosis may have been an early image of squamous cell carcinoma.
authors.affiliation: Department of Respiratory Medicine, Ogaki Municipal Hospital, 4-86 Minaminokawa-cho, Ogaki, Gifu 503-8502, Japan.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Kimura
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Asano
authors.forename: Keiko
authors.initials: K
authors.lastname: Wakahara
authors.forename: Takamasa
authors.initials: T
authors.lastname: Oohashi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Mizutani
authors.forename: Joe
authors.initials: J
authors.lastname: Shindoh
authors.forename: Michiaki
authors.initials: M
authors.lastname: Horiba
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging*; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D014057:Tomography, X-Ray Computed