Pituitary Disorders
The pituitary gland, located at the base of the brain, regulates essential hormones that control growth, metabolism, reproduction, and stress response. Disorders of the pituitary can cause wide-ranging symptoms that affect nearly every system in the body.
Understanding Pituitary Disorders
The pituitary is often called the “master gland” because it controls other hormone-producing glands throughout the body. Pituitary disorders, including tumors, cysts, and inflammatory conditions, can disrupt this hormonal balance and may compress surrounding structures such as the optic nerves, leading to vision changes.
Types of Pituitary Disorders
Prolactinomas
The most common pituitary tumor type, producing excess prolactin. Can cause irregular menstrual periods, infertility, and milk production unrelated to pregnancy.
Growth Hormone-Secreting Adenomas
Tumors that produce excess growth hormone, leading to acromegaly in adults (enlarged hands, feet, facial features) or gigantism in children.
ACTH-Secreting Adenomas (Cushing’s Disease)
Tumors producing excess ACTH, causing the adrenal glands to overproduce cortisol. Results in weight gain, high blood pressure, diabetes, and characteristic physical changes.
Non-Functioning Adenomas
Pituitary tumors that do not produce excess hormones but can compress surrounding structures, causing vision loss and headaches.
TSH-Secreting Adenomas
Rare tumors producing excess thyroid-stimulating hormone, leading to hyperthyroidism.
Craniopharyngiomas
Benign but locally aggressive tumors near the pituitary stalk that can affect vision, hormonal function, and hypothalamic regulation.
Rathke’s Cleft Cysts
Benign fluid-filled cysts near the pituitary that may grow and compress the gland or optic nerves.
Signs & Symptoms
Symptoms depend on the type of pituitary disorder and which hormones are affected, but commonly include:
- Vision changes, particularly loss of peripheral vision
- Persistent headaches
- Irregular menstrual periods
- Changes in growth patterns
- Unexplained weight gain or fatigue
- Changes in body composition
- Increased thirst and urination (diabetes insipidus)
Many pituitary disorders develop gradually, and symptoms may be attributed to other causes before diagnosis. A comprehensive endocrine evaluation is essential.
Diagnostic Approach
A thorough diagnostic workup is critical for determining the type and extent of pituitary involvement. Dr. Kassam and his team coordinate with endocrinology specialists to ensure a complete evaluation:
- Hormone blood tests to measure pituitary hormone levels
- MRI imaging to visualize the pituitary gland and surrounding structures
- Visual field testing to assess optic nerve compression
- Inferior petrosal sinus sampling (for Cushing’s disease when imaging is inconclusive)
- Endocrine evaluation in collaboration with endocrinology specialists
Dr. Kassam's Approach
Dr. Kassam developed the expanded endoscopic endonasal approach for pituitary tumors, accessing the pituitary gland through the natural nasal passages without external incisions. This provides direct access to the pituitary through the sphenoid sinus.
High-definition endoscopic visualization allows for precise tumor removal while preserving normal pituitary tissue and function. Dr. Kassam and his team have performed thousands of endonasal surgeries, with a significant portion involving pituitary pathology.
Direct access: The endonasal route reaches the pituitary through the sphenoid sinus without retracting the brain.
Tissue preservation: High-definition imaging enables selective removal of tumor while sparing healthy pituitary tissue.
Multidisciplinary care: Neurosurgeons, ENT specialists, and endocrinologists collaborate from diagnosis through long-term hormonal management.
Medical-first when appropriate: Some pituitary tumors, particularly prolactinomas, may be managed with medication before surgery is considered.
Treatment Options
Medication
Dopamine agonists (for prolactinomas) and other medical therapies may control tumor growth and normalize hormone levels without surgery.
Endoscopic Endonasal Surgery
Minimally invasive surgical removal through the nasal passages, Dr. Kassam’s area of particular expertise.
Radiation Therapy
May be recommended for residual or recurrent tumors, or when surgery is not appropriate.
Hormone Replacement Therapy
Long-term hormonal management when pituitary function is compromised.
Treatment approach is individualized based on tumor type, size, hormone production, and impact on surrounding structures.
Related Conditions & Innovations
The information on this page is intended for educational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Every patient's condition is unique. Please consult with Dr. Kassam or your physician to discuss your specific situation.