Patient groups
tumor
-11, PATHOLOGY, TUMOR
Patients were divided into two groups based on the N1 stations lymph node dissection technique. In the right lung dissected lymph node stations were 10 hilar, 11 interlobar (superior, inferior), 12 lobar (superior, inferior), 13 segmental (apical, posterior, anterior, medial, lateral, superior, laterobasal, mediobasal, anterobasal, posterobasal) and 14 subsegmental (apical, posterior, anterior, medial, lateral, superior, laterobasal, mediobasal, anterobasal, posterobasal). In the left lung; 10 hilar, 11 interlobar (superior,inferior), 12 lobar (superior, inferior), 13 segmental (apicoposterior, anterior, superior lingula, inferior lingula, superior, laterobasal, anteromediobasal, posterobasal), 14 subsegment(apicoposterior, anterior, superior lingula, inferior lingula, superior, laterobasal, anteromediobasal, posterobasal). Multiple N1 lymph node involvement was defined as pathological positivity in different N1 lymph node stations (stations 10-11-12-13-14). Patients with similar clinico-demographic characteristics including tumor size, and histology were randomly assigned to surgical and pathology groups. In the surgical group, N1 lymph node dissection was performed on the back table by the surgical team after resection. In the pathology group, the specimen was exposed to formaldehyde solution and transferred to the pathology laboratory; N1 lymph node dissections were then performed by pathologists in the pathology laboratory.