The present study was designed to determine the extent of lymph node dissection for clinical T1 @entity1149 without negatively influencing curability. The study included 192 cases with clinical T1 @entity1149 who underwent lobectomy with mediastinal lymphadenectomy. Among 69 cases with @entity1313 , @entity3 was found in subcarinal lymph node in one case only. No @entity3 was found in subcarinal node in cases free of @entity3 in hilar and/or superior mediastinal nodes. Among 33 cases with @entity1313 , @entity3 was detected in the superior mediastinal node only in cases with @entity3 in hilar and/or subcarinal nodes. Among 51 cases with @entity1313 , no @entity3 was found in the subcarinal node. Among 22 cases with @entity1313 , @entity3 was found in the superior mediastinal nodes only in cases with @entity3 in hilar and/or subcarinal nodes. We propose the following scheme for the extent of mediastinal node dissection. Dissection of mediastinal node for clinical T1 @entity1149 cannot be omitted. But, 1) for @entity1313 , subcarinal lymphadenectomy could be omitted if no @entity3 is found in hilar and superior mediastinal nodes based on gross and microscopic examination of frozen sections. 2) Similarly, for @entity1313 , superior mediastinal lymphadenectomy could be omitted if no @entity3 is detected in the hilar and subcarinal nodes.

Extent of mediastinal lymph node dissection for clinical T1 XXXX .

@entity1149 :: ('MESH:D002289', 'Disease') :: ['non-small cell lung cancer', 'non-small cell lung cancers'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastasis'] @entity1313 :: ('MESH:D001932', 'Disease') :: ['left lower lobe tumors', 'upper lobe tumors', 'left upper lobe tumors', 'lower lobe tumors', 'right upper lobe tumors', 'right lower lobe tumors']
@entity1149 :: (MESH:D002289,Disease) :: ['non-small cell lung cancer']
