Cushing’s syndrome – what are the signs and symptoms of Cushing’s syndrome

Cushing's syndrome

Cushing’s syndrome

Introduction

Cushing’s syndrome (hypercortisolism) is a collection of symptoms caused by very high levels of a hormone called cortisol in the body.

The symptoms of Cushing’s syndrome include:

weight gain

thinning skin that bruises easily

reddish-purple stretch marks on the thighs, stomach, buttocks, arms, legs or breasts

fat deposits that develop in the face, causing it to become round

muscle or bone weakness

decreased interest in sex (loss of libido)

What causes Cushing’s syndrome?

Cushing’s syndrome often develops as a side effect of treatment with corticosteroids. Corticosteroids are widely used to reduce inflammation and treat autoimmune conditions (where the immune system malfunctions and attacks healthy tissue).

People taking high doses of corticosteroids long-term often have a build-up of cortisol in their blood. This type of Cushing’s syndrome is sometimes called iatrogenic Cushing’s syndrome.

A less common cause of Cushing’s syndrome is where a tumour (growth) develops inside one of the body’s glands, causing it to produce an excessive amount of hormones. This is known as endogenous Cushing’s syndrome.

Read more about the causes of Cushing’s syndrome.

Diagnosing Cushing’s syndrome

Cushing’s syndrome can be difficult to diagnose because the symptoms are similar to those of other more common conditions, such as an underactive thyroid gland and high blood pressure.

Your GP will need to know whether you’ve been taking medication, and you’ll probably need to have a urine test, blood test, or saliva test to measure the levels of cortisol in your body.

Read more about how Cushing’s syndrome is diagnosed.

Treating Cushing’s syndrome

The main treatment for iatrogenic Cushing’s syndrome is to decrease or withdraw the use of corticosteroids. However, this must be done gradually to avoid any unpleasant side effects.

For endogenous Cushing’s syndrome, surgery to remove the tumour is usually recommended. If surgery is unsuccessful or it’s not possible to remove the tumour safely, medication can be used to counter the effects of the high cortisol levels.

Although treatment is effective, it can take some time to bring the symptoms under control – any time from a few weeks to a few years in some cases.

Left untreated, Cushing’s syndrome can cause high blood pressure, which increases the risk of heart attack and stroke.

Read more about treating Cushing’s syndrome.

Who’s affected?

Cushing’s syndrome is very rare, affecting around 1 in 50,000 people. Anyone can get it, although it tends to affect adults aged from 20 to 50 years. Women are three times more likely to develop the syndrome than men.

Acanthosis nigricans – what are the signs and why we need to be aware of it?

Acanthosis nigricans

Acanthosis nigricans

It’s not a condition in itself, but can be a sign of an underlying health problem. These underlying conditions aren’t usually serious, although occasionally acanthosis nigricans can be sign of cancer.

Signs and symptoms

Dark, velvety patches.  If you have acanthosis nigricans, you’ll have thickened, brownish-grey or black patches of skin.

The patches will be dry and rough, feeling similar to velvet. They may also be itchy.

These patches may occur anywhere, but are usually seen around the neck, in the armpit, around the groin and sometimes in other skin folds. Occasionally, the skin over the joints of the fingers and toes may be affected, as well as the lips, palms of the hands and soles of the feet.

The patches usually develop slowly over time. Patches that grow and spread quickly are more likely to be associated with cancer. In these cases, the mouth, tongue, throat, nose and windpipe may also be affected.

Tiny growths on the skin

You may also have lots of tiny finger-like growths from the patches. This is known as papillomatosis.

There may also be skin tags around the affected area. These are small flesh-coloured or pigmented growths that hang off the skin and look a bit like warts.

When to see your GP

Acanthosis nigricans is usually harmless, but as it can be a sign of something serious it’s a good idea to see your GP if you think you have it. They may suspect acanthosis nigricans just by looking at your skin.

If the cause isn’t clear, you may have blood tests to check your blood sugar or hormone levels, and you might need additional tests such as an endoscopy or X-ray.

What causes acanthosis nigricans?

Acanthosis nigricans sometimes occurs in people who are otherwise in good health, particularly dark-skinned people of African descent.

However, in most cases it’s a sign of an underlying problem or condition such as obesity, diabetes or abnormal hormone levels. Some of the main causes of acanthosis nigricans are outlined below.

Obesity

Acanthosis nigricans is usually the result of obesity. This is known as obesity-associated acanthosis nigricans.

It occurs because obesity can cause insulin resistance (when the body is unable to properly use the hormone insulin), which may lead to high levels of insulin in the blood, affecting the skin cells.

Insulin resistance can also cause type 2 diabetes, so acanthosis nigricans can be an early sign that you have diabetes or are at risk of developing the condition.

Syndromes and hormone problems

Acanthosis nigricans is sometimes associated with an underlying syndrome or hormone problem, such as:

This type of acanthosis nigricans is known as syndromic acanthosis nigricans.

Genes

In rare cases, acanthosis nigricans can be caused by a faulty gene inherited directly from your parents. This is known as familial or benign genetic acanthosis nigricans.

This type is usually passed on in an autosomal dominant pattern, which means it can be passed on if only one of your parents carries the faulty gene.

Cancer

If the dark skin patches come on suddenly and spread quickly, it may be a sign you have cancer (usually stomach cancer). This is known as malignant acanthosis nigricans.

This is a rare condition that tends to affect middle-aged or elderly people, regardless of their weight or ethnic background.

The patches are more severe and the mouth, tongue and lips may also be affected. The skin may also become irritated and itchy.

How acanthosis nigricans is treated

Treatment for acanthosis nigricans aims to correct the underlying cause of your symptoms. This will usually cure the acanthosis nigricans or significantly improve the appearance of your skin.

Treatments that may be recommended include:

There’s no specific treatment to get rid of the patches, but a dermatologist (skin specialist) may be able to recommend treatments such as creams or tablets that may help improve the look of your skin.

Outlook

Most cases of acanthosis nigricans are harmless and not a sign of anything serious. The skin patches often fade with time as the underlying condition is treated.

If you have inherited acanthosis nigricans from your parents, your patches may gradually get bigger before staying the same or eventually fading on their own.

Only in cases where there is underlying cancer is the situation very serious. If the tumour is successfully treated, the condition may disappear, but unfortunately the types of cancer that cause acanthosis nigricans tend to spread quickly and a cure is often not possible.

[Original article on NHS Choices website]