(Pheo; Adrenal Gland Tumor; Pheochromocytosis)


Pheochromocytoma is a tumor. It is made up of special adrenal gland cells. The cells secrete hormones such as epinephrine and norepinephrine. These hormones help to regulate the heart rate and blood pressure. The cells may secrete excessive amounts of the hormones. This results in periods of:Most of these tumors are benign and grow on the adrenal glands, which are located on top of the kidneys. Other tumors occur elsewhere in the body.
Adrenal Glands
Nucleus factsheet image
Copyright © Nucleus Medical Media, Inc.


In most cases, pheochromocytoma has no known cause. In others, it is caused by a genetic mutation.

Risk Factors

Factors that may increase your chance of pheochromocytoma include:
  • A family history
  • Tumors in other glands of the body
  • Hormonal disorders
Genetic diseases associated with pheochromocytoma include:


Most people don't have symptoms. In people who have them, pheochromocytoma may cause:
  • Severe headaches
  • Excessive sweating
  • Fast heart rate
  • Sensation of a panic attack
  • Blurred vision
  • Nausea, vomiting, constipation
  • Pounding heart beat
  • Chest pain
  • Involuntary trembling
  • Pain in the lower chest or upper abdomen
  • Warmth, flushing
  • Increased appetite
  • Weight loss
  • Insomnia
  • High blood pressure, which can be constant or sporadic
  • Tingling, burning, or numbness in the legs and feet
  • Shortness of breath
  • Muscle weakness
  • Anxiety
  • Unable to cope with high temperature
  • Aggressive or unusual behavior

leave comments
Did you like this? Share with your family and friends.
Related Topics:
Current Research From Top Journals

Water Before Meals May Promote Weight Loss
August 2015

A randomized trial found that drinking water before main meals led to higher weight loss than those who were asked to imagine a full stomach before main meals. Water preloading is believed to help create a feeling of fullness or satiety during the meal, which may help curb overeating.

dot separator
previous editions

Fecal Transplants Induce Ulcerative Colitis Remission
July 2015

Exercise Associated with Healthy Baby Weight
June 2015

Mindful Meditation May Reduce Symptoms and Complications of Insomnia
May 2015

dashed separator


Our Free Newsletter
click here to see all of our uplifting newsletters »