title: [Analysis of CT-occult lung cancer diagnosed by bronchoscopy].
abstract: OBJECTIVE
  To explore the clinicopathological and bronchoscopic characteristics of CT-occult lung cancer.
  
  
  METHODS
  Clinical data of 11 patients who were diagnosed with CT-occult lung cancer by bronchoscopy were analyzed retrospectively.
  
  
  RESULTS
  Seven out of eleven patients had bloody sputum. The median disease course was 3 months. Nine patients were in stage I or II, among them 5 cases underwent surgery, with a 5-year survival rate of 80.0%. The upper lobes were predilection areas, and all of the 11 patients had direct sign by bronchoscopy. The most common histopathology was squamous cell carcinoma, which had proliferative changes.
  
  
  CONCLUSIONS
  Patients with symptoms of persistent bloody sputum should undergo a bronchoscopy to make sure whether there is an occult lung cancer or not, even if the chest CT scan is negative at first visit.
authors.affiliation: Department of Respiratory Diseases, Xiang-Ya Hospital, Center South University, Changsha 410008, China.
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.affiliation: Department of Respiratory Diseases, Xiang-Ya Hospital, Center South University, Changsha 410008, China. Email: huchengp28@126.com.
authors.forename: Chengping
authors.initials: C
authors.lastname: Hu
authors.affiliation: Department of Respiratory Diseases, Xiang-Ya Hospital, Center South University, Changsha 410008, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Xu
authors.affiliation: Department of Respiratory Diseases, Xiang-Ya Hospital, Center South University, Changsha 410008, China.
authors.forename: Liming
authors.initials: L
authors.lastname: Cao
authors.affiliation: Department of Respiratory Diseases, Xiang-Ya Hospital, Center South University, Changsha 410008, China.
authors.forename: Huaping
authors.initials: H
authors.lastname: Yang
authors.affiliation: Department of Respiratory Diseases, Xiang-Ya Hospital, Center South University, Changsha 410008, China.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Cai
mesh_terms: D001999:Bronchoscopy; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis*; D012189:Retrospective Studies; D015996:Survival Rate; D014057:Tomography, X-Ray Computed