Prognostic Differences Among T3 Descriptor Subgroups in Resected Lung Cancer

Area of Science:

• Oncology
• Thoracic Surgery
• Cancer Research

Background:

• Nonsmall cell lung cancer (NSCLC) staging is crucial for prognosis.
• T3 NSCLC exhibits prognostic heterogeneity based on specific tumor characteristics.
• Understanding these differences is vital for accurate patient stratification and treatment planning.

Purpose of the Study:

• To investigate survival differences among distinct T3 nonsmall cell lung cancer subgroups.
• To identify specific T3 descriptors associated with poorer prognoses in resected lung cancer patients.

Main Methods:

• Retrospective cohort study of 381 patients with pathologically confirmed T3N0/1 NSCLC.
• Exclusion of patients with mediastinal lymph node metastases or superior sulcus tumors.
• Classification into T3-ordinary, T3-invasion, and T3-multiple subgroups based on pathological T3 descriptors.

Main Results:

• The overall 5-year survival rate was 52% (median 63 months).
• Significant survival differences were observed among subgroups: T3-ordinary (70 months), T3-invasion (58 months), and T3-multiple (43 months).
• The T3-multiple group had a significantly lower 5-year survival rate (40.4%) compared to the T3 single group (54.5%).
• Lymph node status, adjuvant treatment, surgical complications, and T3-subgroups were independent prognostic factors.

Conclusions:

• Patients with multiple T3 descriptors or direct tumor invasion into adjacent structures face the worst survival rates.
• These findings suggest potential for stage migration discussions in these high-risk T3 NSCLC patients.
• Subgroup analysis of T3 NSCLC is essential for refining prognostic assessments.