ABSTRACT
OBJECTIVE: The survival of patients with local advanced of lung cancer (LC) takes several months. Radical operations are extremely complex and
remain the prerogative of several top thoracic surgeons of the world. The search of optimal treatment plan for LC patients (LCP) with stage T3-4N0-2M0
was realized. We examined factors in terms of precise prediction of 5- year survival (5YS) of local advanced LCP after complete (R0) combined
lobectomies/pneumonectomies (LP).
METHODS: We analyzed data of 198 consecutive LCP (age=58.1± 8.2 years; tumor size=6.8± 2.6 cm) radically operated and monitored in 1985- 2024
(m=173, f=25; bi/lobectomies=84, pneumonectomies=114, mediastinal lymph node dissections=198; combined LP with resection of trachea, carina,
atrium, aorta, VCS, vena azygos, pericardium, liver, diaphragm, ribs, esophagus=198; only surgery-S=117, adjuvant chemoimmunoradiotherapy -AT=81:
CAV/gemzar + cisplatin + thymalin/taktivin + radiotherapy 45- 50Gy; T3=137, T4=61; N0=94, N1=44, N2=60, M0=198; G1=42, G2=53, G3=103;
squamous=118, adenocarcinoma=65, large cell=15, central=115, peripheral=83. Multivariate Cox modeling, clustering, SEPATH, Monte Carlo,
synergetics, bootstrap and neural networks computing were used to determine any significant dependence.
RESULTS: Overall life span (LS) was 1671.7±1721.6 days and cumulative 5YS reached 62.4%, 10 years – 50.4%, 20 years – 44.6%. 94 LCP lived more
than 5 years without cancer (LS=2958.6± 1723.6 days), 22 – more than 10 years (LS=5571± 1841.8 days). 67 LCP died because of LC (LS=471.9± 344 days).
AT significantly improved 5YS (68% vs. 53.7%) (P=0.028 by log-rank test). Cox modeling displayed that 5YS of LCP significantly depended on: N0 -N12,
T3-4, blood cell circuit, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), LC cell dynamics, recalcification time, heparin
tolerance, prothrombin index, protein, AT, procedure type (P=0.000-0.031). Neural networks, genetic algorithm selection and bootstrap simulation
revealed relationships between 5YS and N0- 12 (rank=1), thrombocytes/CC (rank=2), segmented neutrophils/CC (3), eosinophils/CC (4), erythrocytes/CC
(5), healthy cells/CC (6), lymphocytes/CC (7), stick neutrophils/CC (8), leucocytes/CC (9), monocytes/CC (10). Correct predictio n of 5YS was 100% by
neural networks computing (error=0.000; area under ROC curve=1.0).
CONCLUSIONS: 5YS of local advanced non- small cell LCP after combined radical procedures significantly depended on: tumor characteristics, LC
cell dynamics, blood cell circuit, cell ratio factors, biochemical factors, hemostasis system, anthropometric data, adjuvant treatment and procedure
type. Optimal strategies for local advanced LCP are: 1) availability of very experienced thoracic surgeons because of complexity radic al procedures; 2)
aggressive en block surgery and adequate lymph node dissection for completeness; 3) precise prediction; 4) AT for LCP with unfav orable prognosis.