disease or disorder cancer cancer cancer diseases A tumor composed of atypical neoplastic, often pleomorphic cells that invade other tissues. Malignant neoplasms often metastasize to distant anatomic sites and may recur after excision. The most common malignant neoplasms are carcinomas (adenocarcinomas or squamous cell carcinomas), Hodgkin and non-Hodgkin lymphomas, leukemias, melanomas, and sarcomas. neoplasm (disease), malignant malignant neoplasm malignant tumor cell type cancer malignancy neoplasm, malignant malignant Growth CA primary cancer MT malignant neoplastic disease organ system cancer malignant neoplasm (disease)