Pituitary adenomas

The diagnostic process for pituitary adenomas depends on what kind of adenoma you have and if it’s causing symptoms or not.

If you have a hormone-secreting pituitary adenoma, your healthcare provider will likely diagnose you with the condition it causes based on your symptoms before diagnosing the adenoma. This is because many conditions that result from excess hormones can have many different causes — not just pituitary adenomas. This is also true of hypopituitarism (pituitary hormone deficiency) causes.

Sometimes, healthcare providers find pituitary adenomas by accident when you get an imaging test of your brain for another condition. In these cases, the adenoma is usually small and nonfunctioning.

Healthcare providers usually treat pituitary adenomas with surgery, medicine, radiation or a combination of these therapies. As each pituitary adenoma is different, you and your healthcare team will come up with a treatment plan that works best for you.

Surgery to remove pituitary adenomas

If you have a pituitary adenoma that’s causing a hormonal imbalance, your healthcare provider will likely recommend surgery to remove all or part of the adenoma. Depending on the size of the adenoma and the severity of your symptoms, you may need multiple surgeries.

Your surgeon will likely use a type of surgery called transsphenoidal surgery to remove the pituitary adenoma, which involves going through your nose and sphenoid sinus, a hollow space in your skull behind your nasal passages and below your brain, to perform surgery. Surgeons use this technique for 95% of pituitary tumors.

If the adenoma is too large to remove through your sinus cavity, your surgeon may open your skull (transcranial surgery) to get to your pituitary and the adenoma. This is a rare surgery technique for pituitary adenomas.

Medication to treat pituitary adenomas

Healthcare providers can treat some types of pituitary adenomas with medication that shrinks the adenoma and relieves symptoms.

If you have a prolactinoma (the most common kind of pituitary adenoma), you’ll likely receive dopamine agonist therapy medications, such as cabergoline (Dostinex®) or bromocriptine (Cycloset®), as the first course of treatment for several months.

In 80% of cases, these medications shrink the prolactinoma, and prolactin levels return to normal. If the medication doesn’t work, your healthcare provider will likely recommend surgery.

Radiation therapy for pituitary adenomas

Radiation therapy uses high-energy X-rays to shrink adenomas or tumors. Healthcare providers use a special form of radiation therapy called stereotactic radiosurgery for pituitary adenomas, which uses a high dose of radiation aimed precisely at the adenoma from more than one direction to keep the adenoma from growing.