The Pituitary Gland & Why It Matters
The pituitary gland — a small structure at the base of the brain — acts as the "master gland" of the endocrine system. It regulates growth hormone, thyroid-stimulating hormone (TSH), adrenocorticotropic hormone (ACTH), prolactin, LH, FSH, and antidiuretic hormone (ADH), each of which controls a cascade of downstream hormonal effects throughout the body.
When the pituitary is affected by a tumor, inflammation, or surgical/radiation injury, one or more of these hormonal axes may be disrupted — causing a wide array of symptoms that can be subtle and easily confused with other conditions.
Pituitary disorders require specialized expertise. Our endocrinologists have training in complex pituitary conditions and work closely with neurosurgery, neuroradiology, and ophthalmology when surgical or multidisciplinary management is needed.
Hormone replacement after pituitary surgery or radiation is a long-term commitment. We provide ongoing management of panhypopituitarism, including growth hormone replacement for eligible patients, to optimize quality of life.
Pituitary Conditions We Manage
🧠 Pituitary Adenoma
Benign tumors of the pituitary gland — classified as micro (<1cm) or macroadenomas (≥1cm). They may be functional (hormone-secreting) or non-functional. Management depends on size, type, and symptoms.
🔵 Prolactinoma
The most common pituitary tumor — causes elevated prolactin, irregular periods, infertility, and galactorrhea in women; low testosterone and sexual dysfunction in men. Usually managed medically with dopamine agonists.
📈 Acromegaly
Caused by a GH-secreting pituitary tumor in adults. Features include hand/foot enlargement, coarsened facial features, joint pain, and metabolic complications. Primary treatment is usually surgical or medical.
🌀 Cushing's Disease
ACTH-secreting pituitary tumor causing excess cortisol: weight gain (especially central), hypertension, diabetes, osteoporosis, and fatigue. Distinguished from Cushing's syndrome by a pituitary source.
📉 Hypopituitarism
Deficiency of one or more pituitary hormones — may result from a pituitary tumor, surgery, radiation, or head trauma. We evaluate and replace deficient hormones including cortisol, thyroid, sex steroids, and growth hormone.
💧 Diabetes Insipidus
Caused by insufficient ADH — resulting in excessive urination and thirst. Central (pituitary) DI is managed with desmopressin (DDAVP). We also evaluate for underlying pituitary or hypothalamic pathology.
Signs That May Suggest a Pituitary Disorder
Persistent Fatigue
Unexplained fatigue — especially when thyroid and adrenal labs are abnormal — may indicate pituitary dysfunction.
Visual Changes
Macroadenomas can compress the optic chiasm, causing bitemporal hemianopsia (peripheral vision loss on both sides).
Galactorrhea or Menstrual Changes
Spontaneous milk production (outside of nursing) or irregular periods in women may indicate elevated prolactin.
Unexplained Weight Gain
Central obesity, easy bruising, and stretch marks may suggest Cushing's disease from an ACTH-producing adenoma.
Joint Pain & Feature Changes
Enlarging hands/feet, jaw changes, or new-onset diabetes in adults may suggest acromegaly.
Excessive Thirst & Urination
Unquenchable thirst with large urine volumes — particularly after pituitary surgery — may indicate diabetes insipidus.