Answer : Tumors are known by different names in different parts of the body . _ Osteoma is the name of a bone tumor in the area of condrama , skull , mucous membranes, nasal cavity, etc. The name of the tumor of brain cells is glyoma , tumor of blood vessels in the brain , liver , etc. Sarcoma tumors usually occur at an early age. Carcinoma tumors usually appear after the age of 40.