Osteoma is not the same as tumor, tumor includes osteoma, osteoma is just a small branch of tumor. Tumor is a broad concept, the newborn tissues that appear to proliferate or differentiate abnormally under the urging of various factors can be called tumors, which can be divided into benign, malignant and junctional. Common benign tumors such as lipoma, fibroma, etc.; malignant tumors are also known as cancer, such as lung cancer, breast cancer, etc.; junctional tumors are located between benign and malignant. Osteoma generally refers to the tumor that occurs in the bone or originates from the bone tissue components, which can also be divided into benign and malignant. Common benign bone tumors such as osteochondroma, osteoid osteoma, etc.; malignant bone tumors such as osteosarcoma, myeloma, Ewing’s sarcoma, etc.. Both benign and malignant bone tumors belong to the category of tumor, which is a branch of the concept of tumor.