ADDISON'S DISEASE
I decided to write about Addison's disease because my dog, our office mascot, Dr. Papidies has this disease. Addison's disease is seen in humans and in animals. There are skin changes in humans that can act as a clue to a dermatologist helping he or she correctly diagnosis the problem. Many times dermatologists must be detectives looking at the patient's entire skin surface for clues that occasionally will lead them to an underlying disease. A well trained dermatologist will take his time with patients; do the appropriate exam and testing that will eventually lead to the correct diagnosis and appropriate treatment.
ADDISONS DISEASE IN HUMANS:
DEFINITION: Addison's disease (AD) is a disease of adrenal insufficiency which is a condition characterized by inadequate production of adrenal hormones cortisol and aldosterone. The adrenal glands are small organs located on top of each kidney. The adrenal gland produces different hormones that control many of our body systems. Hormone production is complex and regulated by the hypothalamus, pituitary gland, and the adrenal gland. If any part of the signaling and feedback system isn't working, it can cause illness within the body. Addison's disease of primary adrenal insufficiency affects levels of cortisol and aldosterone in the body caused by underactive or damaged adrenal glands. Cortisol is a glucorticoid hormone produced by the adrenal gland. Cortisol affects the metabolism of sugars, proteins, fats, sugar levels in our blood, acts as an anti-inflammatory agent, and helps our bodies react to stress. Aldosterone is a mineralcorticoid that manages salt and potassium balance in the blood. If we don't have enough of these two hormones, the body becomes weak and dehydrated, unable to maintain adequate blood pressure and respond properly to stress. AD affects 1 to 4 people per 100,000 in the US, men and women equally, and all age groups.
SYMPTOMS: CAN BE VAGUE AND NONSPECIFIC. They can appear slowly during times of stress. Symptoms can include abdominal pain, dehydration, constipation or diarrhea, dizziness and fainting, fatigue, joint and muscle weakness, low blood pressure, low blood sugar, salt craving, weight loss, and vomiting. SKIN SIGNS: DECREASED BODY HAIR and HYPERPIGMENTATION. We can see dark patches of skin, especially in the folds of the skin; black freckles on the forehead and face, discoloration around nipples, lips, and rectum. ADDISONIAN CRISIS can appear suddenly and can be caused by stress, trauma, surgery, and infection. This crisis can be fatal if left untreated. One should look for kidney failure, loss of consciousness, low blood pressure, severe pain in the legs, back, abdomen, dehydration; and shock.
TESTS: There are tests the physician can perform to help diagnose this disease. Some of these tests include checking cortisol levels, ACTH, electrolytes, aldosterone, kidney function, and glucose levels. These are but a few of the tests available to us in our armamentarium to detect AD.
TREATMENT: There is adequate treatment but no cure!
ADDISONS DISEASE IN DOGS:
AD in dogs is more common than one would think and is very similar to the human variety.
SIGNS AND SYMPTOMS include weakness, vomiting, hypothermia, painful tummy, bloody stools, depression, heart irregularities, low blood pressure, and hair loss. The frightening condition of AD in a dog is life threatening and requires immediate treatment.
TREATMENT is with intravenous injection of saline and cortisol. This is a must or the dog will die. Once the dog is stable, he can be maintained with prednisolone. When the dog is under any stress his prednisolone must be increased. The dog's potassium must be closely monitored. Prognosis is excellent when properly treated with hydrocortisone and aldosterone. As it is difficult for our furry friends to tell us what is going on, sometimes the diagnosis is a difficult one. The owner of a dog with Addison's disease must be extremely vigilant as the dog can go into crisis at any time and die.
My dog, Papidies, is watched very closely. He is never left alone, takes daily medications to keep him alive which must be adjusted in times of stress. He must see the vet monthly to monitor his blood pressure and potassium and have intramuscular medication administered. Within 24 hours after Papidies left the kennel and arrived at my home, he became lethargic and listless, wouldn't eat or drink fluids, and wouldn't go to the bathroom. He became so lethargic that we rushed him to Columbine Animal Hospital where he was placed on IV fluids and eventually AD was diagnosed. He now leads a happy, healthy life as my pet at home and our office mascot.
Leslie Capin MD


