Adenomas are typically classified as what type of tumor?

Adenomas are classified as benign tumors because they are non-cancerous growths that typically arise from glandular tissue. These tumors grow slowly and usually do not invade surrounding tissues or metastasize to other parts of the body, which is a characteristic feature of malignancy. While adenomas can sometimes progress to cancerous forms, they start as benign entities. This classification helps in understanding their behavior, treatment options, and prognosis. The other types of tumors mentioned, such as malignant or pre-cancerous, indicate different growth patterns and risks associated with cancer that are not applicable to adenomas in their typical state. Although neoplastic is a broader term that encompasses both benign and malignant tumors, it is not specific enough to classify adenomas accurately.