Pituitary, hormonal & endocrine care

Pituitary Disorders
& Hormonal Imbalances

The pituitary gland is a small, pea-sized gland located at the base of the brain, but it plays a major role in controlling several important functions of the body. Often called the “master gland”, it produces hormones that influence growth, thyroid function, adrenal hormone production, reproduction and breast milk production. Together with the hypothalamus, it also helps regulate the body’s water balance. Pituitary disorders occur when the gland produces too much or too little of certain hormones, or when a growth or other abnormality develops in or around the gland. These conditions can affect children, young adults, women and men of all ages. Symptoms may develop gradually and sometimes remain unnoticed for years because they can resemble more common medical problems.

Pituitary disorders can cause a wide range of symptoms because different hormones control different organs. Excess prolactin may lead to irregular menstrual periods, infertility, unexpected breast milk discharge or reduced testosterone levels in men. Growth hormone deficiency in children may cause poor height gain, while excessive growth hormone can cause abnormal enlargement of the hands, feet and facial features, a condition known as acromegaly in adults. Excess ACTH production from a pituitary tumour may result in Cushing disease, causing excessive cortisol production, weight gain, muscle weakness, high blood pressure and diabetes. Deficiency of pituitary hormones can cause tiredness, low blood pressure, low thyroid hormone levels, delayed puberty, sexual dysfunction or infertility. The symptoms depend on which hormones are affected and whether the condition develops slowly or suddenly.

Not every pituitary tumour is cancer, and not every pituitary tumour needs surgery. Most pituitary tumours, commonly called pituitary adenomas or pituitary neuroendocrine tumours (PitNETs), are benign. Some produce excess hormones, while others do not produce clinically significant hormone excess. Even non-functioning pituitary tumours may cause problems if they become large enough to compress surrounding structures, particularly the optic nerves or optic chiasm, leading to visual disturbances. Small pituitary lesions are sometimes discovered unexpectedly during an MRI performed for headache or another unrelated reason. These are called pituitary incidentalomas. Many small, stable lesions can be monitored without immediate treatment, while others require hormonal assessment, visual field testing, repeat imaging or surgery depending on their size, location and clinical effects.

Pituitary disorders are not always caused by a tumour. Inflammation of the pituitary gland (hypophysitis), autoimmune conditions, certain infiltrative diseases, infections, genetic disorders, previous pituitary surgery, radiotherapy and head injuries can also affect pituitary function. In women, severe bleeding during childbirth may rarely damage the pituitary gland, causing a condition called Sheehan syndrome. Some children are born with congenital pituitary hormone deficiencies that affect growth, blood sugar regulation or pubertal development. Pituitary stalk or hypothalamic disorders may also interfere with normal hormone signalling. In some patients, several pituitary hormones become deficient together, a condition called hypopituitarism or panhypopituitarism. These patients may require replacement of more than one hormone and careful long-term monitoring.

One important pituitary-related condition is abnormal water balance caused by arginine vasopressin deficiency. Previously called central diabetes insipidus, this condition develops when the body produces or releases insufficient arginine vasopressin, the hormone that helps the kidneys conserve water. Patients may pass unusually large amounts of dilute urine, wake frequently at night to urinate and experience excessive thirst. Despite the older name, diabetes insipidus is different from diabetes mellitus, which causes high blood sugar. Arginine vasopressin deficiency may develop after pituitary surgery, head injury or disorders affecting the hypothalamus and pituitary region. Proper diagnosis is important because excessive water loss can cause dehydration and abnormal sodium levels. Treatment may involve desmopressin, with careful attention to fluid balance and blood sodium levels.

A detailed hormonal evaluation is essential because a normal-looking routine blood test does not always exclude a pituitary disorder. Depending on the symptoms and suspected condition, investigations may include prolactin, IGF-1, morning cortisol, ACTH, TSH, free T4, LH, FSH, estradiol or testosterone. Selected patients may require specialised hormone stimulation or suppression tests. A dedicated pituitary MRI helps identify structural abnormalities, while visual field examination may be needed when a lesion is close to the optic pathways. Importantly, pituitary-related thyroid deficiency may occur even when TSH is not elevated, so free T4 and the overall clinical picture are particularly important. Suspected adrenal hormone deficiency also requires appropriate assessment because untreated cortisol deficiency can become life-threatening during illness or stress.

The treatment of pituitary disorders depends on the exact diagnosis, hormone levels, tumour characteristics and associated symptoms. Many prolactin-producing pituitary tumours respond well to medicines such as cabergoline, which can reduce prolactin levels and tumour size. Other hormone-producing tumours, including those causing acromegaly or Cushing disease, may require specialised pituitary surgery and sometimes additional medicines or radiotherapy. Non-functioning tumours may require observation or surgery when they affect vision or surrounding structures. Patients with pituitary hormone deficiencies may need essential hormone replacement, such as hydrocortisone, levothyroxine, sex hormones, growth hormone or desmopressin, according to the diagnosis. Hormone replacement must be prescribed in the correct sequence and monitored carefully. Some conditions require lifelong treatment even after successful pituitary surgery.

Early recognition and appropriate treatment can improve health, fertility, growth, metabolic wellbeing and quality of life. Pituitary disorders may also affect bone strength, cardiovascular health and long-term hormone balance. Children need appropriate growth and puberty monitoring, while adults may require evaluation of reproductive, thyroid, adrenal and metabolic functions. Dr. Rajesh Moganti (MD, DM Endocrinology) provides comprehensive evaluation and management of pituitary tumours, prolactin disorders, acromegaly, Cushing disease, pituitary hormone deficiencies and related hormonal conditions at our Rajahmundry and Tanuku centres. Care focuses on identifying the underlying disorder, selecting appropriate investigations, providing personalised medical treatment and coordinating neurosurgical or other specialist care when required.