Malignant Skull Base Tumor Malignant Skull Base Tumors Some malignant, or cancerous, skull base tumors grow more rapidly than benign tumors. They have the potential to spread to other areas of the body. Following are the types of malignant skull base tumor: 1. Chondrosarcomas Chondrosarcoma is a type of cancer that starts in the cartilage at the junction of the bones of the skull base. These tumors can grow slowly or rapidly. Symptoms of chondrosarcomas depend on their location in the skull base and may include headache, ringing in the ears, and problems with vision, hearing, or balance. These symptoms might result in brain cancer . 2. Esthesioneuroblastomas An esthesioneuroblastoma arises from cells in the olfactory nerves, which travel from the nose to the brain and control the sense of smell. This type of tumor occurs in the nasal cavity and can grow into the skull base. An esthesioneuroblastoma can obstruct the nasal passages and cause nosebleeds, changes...