Cushing’s Disease

What Is Cushing’s Disease? Understanding Symptoms, Causes, and Treatment

Cushing’s disease is a rare but serious hormonal disorder caused by prolonged exposure to high levels of cortisol—the body’s main stress hormone. It typically results from a tumor in the pituitary gland that signals the adrenal glands to produce too much cortisol.

At Thyroid Doctor Miami, we specialize in diagnosing and managing endocrine conditions like Cushing’s disease with expert care and a personalized approach.

What Causes Cushing’s Disease?

Cushing’s disease (not to be confused with Cushing’s syndrome) is caused specifically by a pituitary adenoma—a non-cancerous tumor in the pituitary gland. This tumor produces excess ACTH (adrenocorticotropic hormone), which in turn overstimulates the adrenal glands to produce cortisol.

Other forms of Cushing’s syndrome can be caused by:

Adrenal tumors
Ectopic ACTH-producing tumors (in the lungs or pancreas)
Long-term use of corticosteroid medications like prednisone

Symptoms of Cushing’s Disease

Cushing’s disease develops gradually, and its symptoms can often be mistaken for other health issues. Common signs include:

Weight gain, especially around the face (“moon face”), upper back (“buffalo hump”), and abdomen
Thinning skin that bruises easily
Purple stretch marks (striae), especially on the abdomen or thighs
Muscle weakness (especially in arms and legs)
High blood pressure
High blood sugar or diabetes
Acne or oily skin
Fatigue and mood changes, including depression and anxiety
Menstrual irregularities or loss of periods in women
Decreased libido and fertility issues
Osteoporosis or frequent fractures

If left untreated, Cushing’s disease can lead to serious complications including heart disease, diabetes, and bone loss.

How Is Cushing’s Disease Diagnosed?

Diagnosing Cushing’s disease is complex and requires a combination of hormone testing and imaging. At Thyroid Doctor Miami, we follow a step-by-step approach to ensure accurate results:

1. Cortisol Testing

24-hour urine cortisol test
Late-night salivary cortisol test
Low-dose dexamethasone suppression test

These tests help determine if your body is making too much cortisol.

2. ACTH Testing

Measuring ACTH levels can help identify whether the excess cortisol is coming from the pituitary gland, adrenal gland, or another source.

3. Imaging Studies

MRI of the brain to look for a pituitary tumor

CT scans of the adrenal glands or other areas if ectopic ACTH production is suspected

Treatment Options for Cushing’s Disease

Treatment is focused on reducing cortisol levels to normal and managing the tumor, if present.

1. Pituitary Surgery

The most common treatment is transsphenoidal surgery, where the tumor is removed through the nose without damaging surrounding brain tissue. This is often highly effective.

2. Medications

If surgery isn’t an option or doesn’t fully resolve the issue, medications may be used to:

Block cortisol production (e.g., ketoconazole, metyrapone)
Control ACTH secretion
Help manage symptoms like diabetes or high blood pressure

3. Radiation Therapy

Used when surgery is incomplete or not possible. Radiation is targeted to the pituitary tumor to shrink or stop its activity over time.

4. Adrenal Gland Removal

In rare cases, removal of one or both adrenal glands (adrenalectomy) may be required to control cortisol levels.

Recovery and Follow-Up

Recovery from Cushing’s disease takes time, especially as your body adjusts to normalized hormone levels. Patients may experience:

Temporary fatigue
Hormonal fluctuations
Emotional changes

Lifelong follow-up with an endocrinologist is essential to monitor hormone levels and check for recurrence.

Life After Treatment

With the right care, most people with Cushing’s disease can return to a healthy, active life. You may need hormone replacement therapy after treatment, especially if your adrenal glands or pituitary function is reduced.

At Thyroid Doctor Miami, we’re here to guide you through every step—from diagnosis to recovery—with expertise and compassion.

When to See a Specialist

You should consult an endocrinologist if you:

Have unexplained weight gain and fatigue
Notice visible signs like facial swelling or stretch marks
Have high blood pressure or blood sugar that’s difficult to manage
Suspect symptoms may be related to long-term steroid use

Early diagnosis can prevent complications and significantly improve quality of life.

Let’s Get You the Answers You Need

Cushing’s disease can be overwhelming, but you don’t have to face it alone. Our team at Thyroid Doctor Miami is here to provide clarity, comfort, and expert care.

📞 Call us at (305) 512-4411 or schedule a consultation online today.