BACKGROUND: Although lobe-specific nodal spread of primary @entity2 has been recently described, segment-specific nodal spread remains unclear. We investigated the frequency of hailer and mediastinal lymph node involvement and survival in @entity1 with @entity5 located in the superior segment (SS) and @entity1347 ( @entity1347 ) in the right lower lobe. METHODS: Two hundred and sixty-three @entity1 with primary @entity2 originating in the right lower lobe underwent lobectomy with systematic mediastinal lymph node dissection. @entity1 were categorized into two groups: SS (n   =   114) or @entity1347 (n   =   149). RESULTS: Frequencies of @entity3 to station 11s and 11i were significantly higher in the SS (P   <   0.0001) and @entity1347 groups (P   =   0.022), respectively. Both the SS and @entity1347 groups showed a high frequency of subcarinal mediastinal zone (station 7) @entity3 (96.9% and 90.6%, respectively; P   =   0.271). The frequencies of superior mediastinal zone (station 2R and 4R) @entity3 were 37.5% in the SS and 35.8% in the @entity1347 group (P   =   0.878). In @entity1 with pN2 disease, three-year disease-free survival was significantly shorter in the SS (22.6%) than the @entity1347 group (42.1%; P   =   0.020). In the @entity1347 group, the independent predictive factors of a poor or good prognosis were @entity3 to station 11i or @entity13425 @entity3 , respectively; however, we did not detect an independent prognostic factor in the SS group. In the right lower lung lobe, there was no segment-specific nodal spread. CONCLUSION: When segmentectomy is undertaken, mediastinal lymph node dissection should be performed in proportion to lobectomy.

Prognosis and segment-specific nodal spread of primary XXXX in the right lower lobe.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity13425 :: ('22938', 'Gene') :: ['skip'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumors'] @entity1347 :: ('MESH:C537775', 'Disease') :: ['basal segment', 'BS'] @entity2 :: ('MESH:D008175', 'Disease') :: ['lung cancer'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastasis']
@entity2 :: (MESH:D008175,Disease) :: ['lung cancer']
