Prognostic Significance of a Solid Component in Pulmonary Adenocarcinoma

Pulmonary adenocarcinoma patients with any amount of SAC had worse prognoses than those without any SAC. The presence of SAC was an independent unfavorable prognostic factor, comparable to other pathologic findings indicating invasion. Solid adenocarcinoma component was an upstaging factor in T classification for T1 and T2a pulmonary adenocarcinomas. If SAC is present, we propose T1 and T2a tumors should be classified as T2a and T2b, respectively.