Astrocytoma: Abnormal Growth of Brain Cells
Astrocytomas are tumors that originate from star-shaped brain cells called astrocytes. These abnormal growths can occur anywhere in the brain and, in rare cases, even in the spinal cord. The severity of an astrocytoma is determined by a grading scale ranging from I to IV, which also indicates the likelihood of the tumor becoming malignant.
Stage I astrocytomas are relatively minor and can be surgically removed or treated with radiation therapy. However, as the tumor progresses to stage II and beyond, the life expectancy of the affected individual decreases, even with proper treatment.
Osteoma
Osteoma is a type of tumor that can develop in the bones and surrounding tissue. These tumors are characterized by the formation of new pieces of bone. While the exact cause of osteomas is unknown, they are commonly found on the skull. There are two types of osteomas: homoplastic, which grow from another bone, and heteroplastic, which grow on the surrounding tissue. The presence of osteomas on the skull can lead to various symptoms including pain, headaches, and sinus infections. Additionally, the tumors can exert pressure on the cranial nerves, resulting in palsies and potential loss of hearing or vision.