title: Criteria for intentional limited pulmonary resection in cT1N0M0 peripheral lung cancer.
abstract: OBJECTIVE
  The purpose of this study was to establish selection criteria for intentional limited resection in patients with peripheral lung cancer.
  
  
  METHODS
  Six hundred eighty-nine cases of cT1N0M0 peripheral non-small cell lung cancer were divided into groups according to maximum tumor diameter. The cases in each group were examined for histopathological invasive factors, and the results of a pilot study of intentional limited resection were assessed.
  
  
  RESULTS
  The positive rate of invasive factors was 30.8% among the patients with tumors 2 cm or less in diameter, and significantly lower than the 44.0% noted in those whose tumor diameter was in the 2.1-3.0 cm range. The positive rate was significantly lower in 90 patients with type A or B adenocarcinoma, and none of these patients developed postoperative recurrence. In 24 of these 90 patients, the tumor diameter was in the 2.1-3.0 cm range. The 5-year survival rate in the 74 patients with pT1N0M0 and tumors 2 cm or less in diameter who underwent limited resection was 89.1%.
  
  
  CONCLUSIONS
  We attempted to establish selection criteria for limited resection, with the aim of obtaining survival rates that was comparable to those obtained after lobectomy. The selection criteria established in this study are: 1, cT1N0M0 peripheral non-small cell lung cancer; 2, maximum tumor diameter 2 cm or less on diagnostic images, but a tumor diameter in the range of 2-3 cm in adenocarcinoma of Noguchi type A or B cases; 3, limited resection feasible based on tumor location.
authors: Division of Chest Surgery, Niigata Cancer Center Hospital, 2-15-3 Kawagishi-cho, Niigata 951-8566, Japan.
authors: Teruaki
authors: T
authors: Koike
authors: Yasushi
authors: Y
authors: Yamato
authors: Katsuo
authors: K
authors: Yoshiya
authors: Satsuki
authors: S
authors: Kina
authors: Takehiko
authors: T
authors: Shimoyama
authors: Ryuta
authors: R
authors: Suzuki
authors: Shuichi
authors: S
authors: Satou
authors: Keiichi
authors: K
authors: Honma
mesh_terms: D000230:Adenocarcinoma / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002289:Carcinoma, Non-Small-Cell Lung / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D018307:Neoplasms, Squamous Cell / Q000601:surgery; D018579:Patient Selection; D011013:Pneumonectomy / Q000379:methods*; D012189:Retrospective Studies