A pituitary tumor is an abnormal growth that occurs in the pituitary gland, a small gland located at the base of the brain. This gland plays a crucial role in regulating various hormones that control important bodily functions, such as growth, metabolism, and reproduction. Pituitary tumors can be classified as benign (non-cancerous) or malignant (cancerous), with most being benign. Symptoms of a pituitary tumor can vary depending on its size and type. Common symptoms include headaches, vision problems, and hormonal imbalances, which may lead to conditions like Cushing's disease or acromegaly. Diagnosis typically involves imaging tests, such as an MRI, and treatment options may include surgery, medication, or radiation therapy.