Adenomas and Adenocarcinomas

M-809 classifies glandular neoplasms, encompassing both benign adenomas and malignant adenocarcinomas, and is used to record tumors that arise from epithelial cells with glandular differentiation regardless of organ site. This entry groups tumors that share similar histologic features, ranging from non-invasive, well-defined adenomatous growths to invasive, infiltrative adenocarcinomas.