Cushing’s Syndrome

Mood swings, unexplained weight gain, unusual bruising, or stretch marks – at first glance, these symptoms may seem unrelated. However, when they appear together, they may point to a deeper hormonal imbalance known as Cushing’s syndrome. Although this condition is rare, it is serious and often goes undiagnosed for months due to its subtle and gradual onset. Understanding the symptoms and underlying causes can help ensure early detection and timely intervention. Read on to learn what Cushing’s syndrome is, how it is diagnosed, and what treatment options are available.

What Is Cushing’s syndrome?

Cushing’s syndrome is a hormonal disorder that occurs when the body produces too much cortisol over an extended period. Cortisol is a hormone naturally released in response to stress. It plays an important role in regulating blood pressure, blood sugar levels, and immune system function. However, when cortisol levels are too high, it can disrupt the functioning of various systems in the body.

There are two main types of Cushing’s syndrome:

• Endogenous Cushing’s syndrome: Caused by the body’s own overproduction of cortisol, most commonly due to a tumor in the pituitary gland (known as Cushing’s disease) or in the adrenal glands.
• Exogenous Cushing’s syndrome: Occurs as a result of long-term use of corticosteroid medications, which are often prescribed to treat chronic inflammatory conditions such as asthma, rheumatoid arthritis, or autoimmune disorders.

Most common symptoms of Cushing’s syndrome

The symptoms of Cushing’s syndrome develop gradually and can vary from person to person. Because of this, they are often misinterpreted and may go unnoticed for an extended period.

Physical symptoms include:

• A rounded face (“moon face”)
• Fat accumulation around the abdomen, neck, and between the shoulder blades
• Thin arms and legs due to muscle loss
• Easy bruising and slow wound healing
• Thin, fragile skin and the appearance of stretch marks, especially purple ones on the abdomen, thighs, and chest
• Weight gain, particularly in the midsection
• Excessive hair growth in women (hirsutism)

Psychological and metabolic symptoms:

• Mood changes, including anxiety, irritability, and depression
• Fatigue and muscle weakness, especially in the legs and arms
• Sleep disturbances
• Elevated blood sugar levels and the onset of diabetes
• High blood pressure
• Reduced libido and menstrual irregularities in women

Because its signs are varied and often non-specific, Cushing’s syndrome can be mistaken for conditions such as obesity, hormonal imbalances, or depression. Careful monitoring of symptom patterns and timely medical evaluation can help ensure an accurate diagnosis.

Causes and risk factors of Cushing’s syndrome

Cushing’s syndrome can arise from various causes, but the underlying problem is always the same: an excessive amount of cortisol in the body. Depending on whether the cause is internal (endogenous) or external (exogenous), the mechanisms leading to the disorder differ.

Endogenous causes (Internal)

These causes stem from the body’s own hormonal regulation, most often due to tumors that affect cortisol production or the hormones that stimulate it.

• Pituitary tumors – The most common cause of endogenous Cushing’s syndrome. A tumor (adenoma) in the pituitary gland produces too much adrenocorticotropic hormone (ACTH), which stimulates the adrenal glands to produce excess cortisol. This condition is known as Cushing’s disease.
• Adrenal tumors – These can be benign (adenomas) or malignant and directly lead to increased cortisol production.
• Ectopic ACTH production – Rare tumors located outside the pituitary gland (most often in the lungs) can produce ACTH, which also results in elevated cortisol levels.

Exogenous causes (External)

Cushing’s syndrome can also result from the long-term use of corticosteroid medications, such as prednisone or dexamethasone, which are commonly prescribed to treat chronic inflammatory, autoimmune, and allergic conditions. While these medications are effective, prolonged use – especially in high doses or without proper medical supervision – can lead to the development of Cushing’s syndrome.

Additional risk factors

Although they don’t cause Cushing’s syndrome in the strict medical sense, certain conditions can lead to hormonal imbalances that mimic or are mistaken for the disorder:

• Chronic psychological or physical stress
• Obesity, particularly central (abdominal) obesity
• Poorly controlled type 2 diabetes
• High blood pressure accompanied by other symptoms

While these conditions do not lead to true Cushing’s syndrome, they can share overlapping symptoms and raise concerns about possible hormonal imbalance. Understanding the cause is important for choosing the right treatment, which should be based on what’s creating the imbalance.

How Cushing’s syndrome is diagnosed

Diagnosing Cushing’s syndrome involves a combination of laboratory tests and imaging studies to confirm a hormonal imbalance and identify its underlying cause.

Primary diagnostic methods

Cortisol testing:

• 24-hour urine collection – Measures the total amount of cortisol excreted over a full day
• Late-night salivary cortisol test – Detects disruptions in the natural daily rhythm of cortisol
• Morning blood cortisol levels – Measures cortisol concentration in the blood at the start of the day

Let me know when you’re ready to move on to the dexamethasone suppression test and other diagnostic steps.

Dexamethasone suppression test

This test measures the body’s response to the synthetic corticosteroid dexamethasone. In healthy individuals, cortisol levels decrease after taking dexamethasone. In people with Cushing’s syndrome, cortisol levels remain elevated.

ACTH hormone testing

Helps determine whether the source of the disorder is the pituitary gland, the adrenal glands, or another part of the body.

Imaging (radiological methods):

• MRI of the pituitary gland – Used to detect pituitary tumors
• CT scan of the adrenal glands or lungs – Used to identify tumors that may be producing cortisol or ACTH

Early diagnosis can prevent serious complications such as type 2 diabetes, osteoporosis, muscle loss, and cardiovascular disease. If you have persistent symptoms that worsen over time, seeing an endocrinologist is the first step toward accurate diagnosis and effective treatment.

Treatment options

Treatment for Cushing’s syndrome depends on the underlying cause of excessive cortisol production. The goal is to normalize hormone levels in the body and prevent long-term complications. In some cases, a full recovery is possible; in others, treatment focuses on managing symptoms and improving quality of life.

1. Surgical Treatment

Surgical removal of a pituitary or adrenal tumor is the most common and effective approach for treating endogenous Cushing’s syndrome.

• If the tumor is located in the pituitary gland, the surgery is typically performed endoscopically through the nasal passages (transnasally).
• If the tumor is in the adrenal glands, it is usually removed laparoscopically.
• In cases of ectopic ACTH production, the tumor is removed from the location where it originated, most often the lungs.

2. Medication therapy

• This approach is used when surgery is not possible, has not been successful, or while awaiting a surgical procedure.
• Medications can work in different ways: by reducing cortisol production, blocking cortisol receptors, or lowering ACTH levels.

3. Gradual reduction of corticosteroids

• If the syndrome is caused by long-term use of corticosteroid medications, the doctor will create a plan for gradually tapering the dose. This helps prevent withdrawal symptoms and allows the adrenal glands to recover.

4. Radiation or chemotherapy (in rare cases)

• These treatments are used for malignant or hard-to-reach tumors, especially when surgery is not an option.

Timely and appropriate treatment can significantly reduce symptoms, but recovery may take months or even years. The course of therapy is always tailored to the individual needs of the patient.

Life with Cushing’s syndrome

Recovery from Cushing’s syndrome doesn’t end with treating the underlying cause — both the body and mind often need time to adjust to new conditions. Symptoms may gradually subside, but some individuals may experience lasting changes in metabolism, bone density, or mood.

Recovery after treatment:

• Physical recovery may involve gradually regaining strength, losing excess weight, and seeing improvements in skin changes.
• Hormonal balance may not return immediately — the adrenal glands can remain weakened and may require additional hormone therapy for a certain period.
• Psychological symptoms such as depression and anxiety may persist even after hormone levels stabilize and might require ongoing psychological support.

Lifestyle changes:

• Healthy diet focused on anti-inflammatory foods, blood sugar control, and adequate calcium intake to support bone health
• Regular physical activity adapted to individual ability — important for strengthening muscles and managing body weight
• Monitoring bone density and cardiovascular health, as complications like osteoporosis and high blood pressure are common
• Support and education — joining support groups or seeking counseling can help with accepting the diagnosis and building emotional resilience

Frequently asked questions about Cushing’s syndrome

Is Cushing’s syndrome curable?

In many cases, yes. If diagnosed early and the cause (e.g., a tumor) is successfully removed, a full recovery is possible. For other patients, the syndrome can be managed with medication and regular monitoring of hormone levels.

How common is Cushing’s syndrome?

Cushing’s syndrome is a rare disorder, but it occurs more frequently in women between the ages of 20 and 50. In most cases, it is caused by a pituitary adenoma that produces excess ACTH.

Can Cushing’s syndrome come back after treatment?

Yes, recurrence is possible, especially if the underlying cause was not fully eliminated. That’s why it’s important to regularly monitor cortisol levels after treatment.

Is there a natural way to regulate cortisol?

Although true Cushing’s syndrome cannot be treated with natural methods alone, healthy habits – such as a balanced diet, regular physical activity, quality sleep, and stress management – can help maintain hormonal balance, especially in individuals with a history of the syndrome.

Balance your hormones, improve your life

Cushing’s syndrome is a serious but treatable condition if recognized and addressed in time. Don’t ignore the signals your body is sending. Suspect a hormonal imbalance? Don’t wait – a cortisol test at IntroLab in Belgrade could be the first step toward recovery.