What term describes the widespread dissemination of carcinoma in the body?

The term that best describes the widespread dissemination of carcinoma in the body is "carcinomatosis." This term specifically refers to a condition where cancerous tumors are present in multiple organs or regions of the body, indicating that the cancer has spread from a primary site to various secondary sites.

Carcinomatosis often signifies advanced disease and can complicate treatment options due to the involvement of multiple organ systems. Understanding this term is crucial for recognizing the severity and extent of cancer progression in a patient.

While "metastasis" also relates closely to the spread of cancer, it specifically refers to the process of cancer cells spreading from the primary tumor to distant organs or tissues. In contrast, "carcinomatosis" emphasizes the multitude of sites affected. "Oncology" refers to the branch of medicine that deals with tumors, and "neoplasm" is a general term for any new abnormal growth of tissue, which may not necessarily be cancerous.