BACKGROUND: Clinical stage (c-stage) I @entity1149 ( @entity1149 ) is generally indicated for surgery, however, surgical exploration sometimes reveals @entity1442 , thus resulting in incomplete resection. @entity1 AND METHODS: A total of 645 consecutive @entity1 were investigated in which 347 were diagnosed to have c-stage IA in 347 and 298 were diagnosed to have @entity66 . All cases underwent operation and were investigated for resectability and the cause of an incomplete resection. RESULTS: The c-Stage IA @entity1 included 16.6% of T3/4 and 10.4% of N2 whereas clinical stage IB @entity1 included 14.4% of T3/4 and 18.8% of N2/3. A complete resection was performed in 594 @entity1 (91%). In 347 c-stage IA @entity1 , the complete resection rates were 93% in @entity420 (235/252), 100% in @entity957 (76/76), and 89% in others (17/19). In 298 c-stage IB @entity1 , the complete resection rates were 86% in @entity420 (141/164), 90% in @entity957 (90/100), and 94% in others (31/33). The 5-year survival rates of the c-stage IA and IB @entity1 who underwent a complete resection were 66.4 and 48.3%, respectively. However, the same rates were 18.4 and 14.7% for c-stage IA and IB @entity1 who underwent an incomplete resection. The reasons for an incomplete resection in 54 @entity1 were @entity5 in 38 (70.4%), extranodal invasion of mediastinal nodal metastasis in ten (19%), an incomplete bronchial margin in three (5.6%), and ipsilateral pulmonary metastases in two (3.7%), and ipsilateral adrenal metastasis in one (1.3%). In 13% of the c-stage IB @entity420 , @entity3 was discovered during thoracotomy. CONCLUSIONS: Pleural dissemination was the most frequent cause of an incomplete resection, and its prevalence was high in c-stage IB @entity420 .

Operative results of clinical stage I XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'PATIENTS'] @entity66 :: ('MESH:D004194', 'Disease') :: ['IB disease'] @entity5 :: ('MESH:D009369', 'Disease') :: ['malignant pleurisy'] @entity957 :: ('MESH:D002294', 'Disease') :: ['squamous cell carcinomas'] @entity1149 :: ('MESH:D002289', 'Disease') :: ['NSCLC', 'non-small cell lung cancer'] @entity1442 :: ('MESH:D020178', 'Disease') :: ['advanced disease'] @entity3 :: ('MESH:D009362', 'Disease') :: ['pleural metastasis'] @entity420 :: ('MESH:D000230', 'Disease') :: ['adenocarcinomas']
@entity1149 :: (MESH:D002289,Disease) :: ['non-small cell lung cancer']
