Journal of thoracic oncology : official publication of the International Association for the Study of Lung Cancer
-
To assess the impact of cell type, age, and gender in addition to pathologic tumor, node, metastasis (TNM) stage in surgically managed stage I-IIIA non-small cell lung cancer (NSCLC) cases from the international staging database of the International Association for the Study of Lung Cancer. ⋯ Age and gender are confirmed as important prognostic factors in surgically resected NSCLC. Cell type is less important, although the small population of cases classified as BAC have a survival advantage over other histologies, and there may be a small survival advantage for squamous cell carcinomas over non-BAC adenocarcinomas. Imbalances between stage, gender, and cell type at presentation may lead to a misleading result with respect to cell type in unadjusted analyses. Pathologic TNM category is the most important prognostic factor in this analysis.
-
For the identification of the patients who most likely benefit from epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors in non-small cell lung cancer (NSCLC), molecular assays are considered to be of paramount importance. Given the heterogeneity of NSCLC at the molecular level, this study was conducted to determine the discrepancy in EGFR mutations between primary tumors and the corresponding lymph node metastasis. ⋯ A considerable proportion of NSCLC showed discrepancy in EGFR mutations between primary tumors and metastatic lymph nodes, suggesting tumor heterogeneity at the molecular level during the process of metastasis.
-
Well-differentiated papillary mesothelioma is a pathologic entity distinct from malignant mesothelioma and has a different tumor biology highlighted by its relatively good prognosis. We report the case of a 27-year-old woman with pleural well-differentiated papillary mesothelioma, who was treated with bilateral pleurodesis and pericardial window to control the production of malignant fluid, without significant systemic anticancer treatment. She survived for 16 years, confirming its indolent nature. This case report also highlights the role of fluid cytology, immunohistochemistry, and electron microscopy in the diagnosis of well-differentiated papillary mesothelioma and the potential use of serum CA-125 as a marker of progression.