What is classified as a malignant tumor but has specific categories like primary or secondary?

A malignant tumor is characterized by uncontrolled cell growth and the potential to invade other tissues. The term "neoplasm" refers to any new and abnormal growth of tissue, and it encompasses both benign and malignant tumors.

In the context of tumors, malignant neoplasms are specifically referred to as "malignant neoplasms," while the term "neoplasm" itself does not exclusively imply malignancy; it simply signifies any type of abnormal tissue growth.

Categories such as primary or secondary malignancy differentiate the origin of the cancer: primary malignancy originates at the site where it is found, while a secondary malignancy (or metastasis) arises from cancer cells that have spread from their original site to another part of the body.

Thus, while "carcinoma in situ" pertains to cancers that are localized and have not invaded surrounding tissues, and "primary" and "secondary malignancies" refer directly to the nature of specific malignant tumors, the broader term "neoplasm" correctly includes malignant tumors and recognizes their complex categorization.