RESUMO
OBJECTIVES: Primary adenosquamous carcinoma (ASC) of the lung is rare. The current study was a retrospective two-institutional analysis of surgical therapy with respect to the clinicopathological characteristics and prognostic factors associated with ASC of the lung. METHODS: The clinical records of patients with pathologically confirmed ASC of the lung treated surgically in two centres between January 2008 and December 2014 were retrospectively reviewed. RESULTS: One hundred and four patients with ASC of the lung after surgical intervention, including 68 males and 36 females were identified. The 5-year overall survival (OS) and disease-free survival (DFS) of all ASC stages were 38.3 and 16.9%, respectively. Patients with N0, N1 and N2 ASC [N0 vs N1 (P = 0.047) and N1 vs N2 (P = 0.028), respectively], or Stage I, II and IIIA ASC [Stage I vs Stage II (P = 0.005) and Stage II vs Stage IIIA (P = 0.016), respectively] had significant differences with respect to OS. Multivariate analysis using a Cox proportional hazards model indicated that the level of serum carbohydrate antigen 12-5 (CA 12-5) (normal vs high level, P = 0.029), TNM stage [Stage I vs Stage IIIA (P < 0.001), Stage II vs Stage IIIA (P = 0.001)] and adjuvant chemotherapy (P = 0.027) were significant factors associated with OS in ASC patients, and TNM stage [Stage I vs Stage IIIA (P < 0.001), Stage II vs Stage IIIA (P = 0.003)] and adjuvant chemotherapy (P < 0.001) were the significant prognostic variables for DFS. CONCLUSIONS: Serum CA 12-5 level and TNM status predict the long-term prognosis of resected primary ASC of the lung. Postoperative platinum-based chemotherapy improved survival in patients with ASC.