Tumor is a new organism formed by cell proliferation and differentiation, including benign, malignant, and junctional tumors, and carcinoma belongs to one kind of malignant tumors, which is of epithelial origin. So tumor is a big concept and cancer is a small concept.
Tumor is a new organism formed by proliferation and differentiation of body cells under the influence of various factors, which can be divided into benign, malignant and intermediate junctional tumors according to the biological characteristics and the degree of harm to the body. Benign tumors such as uterine smooth muscle tumors, malignant tumors such as breast cancer, lymphoma, etc., and junctional tumors such as colorectal adenomas.
Malignant tumors can be further classified according to their histological origins. Malignant tumors of epithelial origin are called carcinomas, such as breast cancer, endometrial cancer, lung cancer, etc. Malignant tumors of mesenchymal origin are called sarcomas, such as osteosarcoma.
To sum up, carcinoma is one kind of tumor, and the scope of tumor is bigger than cancer.