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Ask Dr. Hibberd: Overactive Thyroid

From: Newsmax Health <newsmax(*)reply.newsmax.com>
Date: Wed, 31 Oct 2007 15:32:54 GMT
To: "test(*)testcompany.com" <test(*)testcompany.com>







Questions for Dr. Hibberd

Headlines (Scroll down for complete stories):
1. Overactive Thyroid
2. Undescended Testicle
3. Chronic Hives
4. What is Mastocytosis?
5. Persistent Diarrhea



1. I am 37 years old, and I was diagnosed with an enlarged thyroid two years ago. Even though my thyroid is over-active, I am still gaining weight. I’ve always been skinny, but I started getting fat after the age of 32. I started taking a thyroid drug, but I was allergic so I stopped. Am I in any serious risk?

— Connie S.

Having an overactive thyroid places your body functions in overdrive, which causes fatigue and anxiety. It also over-stimulates your heart, placing you at an increased risk for heart complications related to the rate at which the heart beats (called arrythmias). This does not contribute to weight gain, though endocrine (hormonal) disorders are commonly found in some patients. These are referred to as multiple endocrine adenopathies, a fancy term for multiple co-existing hormonal conditions.

I recommend you see your medical doctor for evaluation. Afterwards, request a consultation with an endocrinology specialist. These conditions need to be treated, because of the complications of untreated endocrine disease. Leaving your thyroid disorder (which may not be the only disorder you have) untreated may leave you "mad as a hatter," and you are placing yourself at risk for thyroid storm which may cause shock and cardiovascular collapse. Thyroid storm is a life-threatening medical emergency requiring immediate emergency treatment, and deaths do occur.

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2. My Grandson is eleven, and a recent checkup found that one of his testicles hasn't dropped. He was told he needs surgery. Is this necessary?

— Jeff M.

Yes. The discovery of undescended testes in an 11 year old is reason for immediate surgical correction by an urologist. For palpable undescended testes, surgical orchiopexy is performed, where the testes is brought into the scrotum and sutured in place. A commonly associated condition, inguinal hernia, is also repaired at the same time. For nonpalpable undescended testicles, laparoscopy is required to fix its place in the scrotum. If it has atrophied, it is removed.

Usually the lack of descent is noted in examinations done shortly after birth. Correction should be done by 6 months of age and certainly before 18 months, because early intervention improves fertility and reduces the risk of testicular carcinoma development.

Patients with undescended testicles are at increased risk for the development of testicular carcinoma (cancer!) in both testicles. The testicular cancer risk also applies to the other descended testicle. Studies of patients with a history of undescended testicle have found that 10 percent of cancers will develop on the normal side.

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3. I have had chronic hives for 17 years. I have seen 11 doctors, and no one can figure out what is causing them or how to stop them. I have been on steroids for 17 years and am 150 pounds overweight as a result. Allergy tests show nothing that could be causing the hives, and doctors assume my problem is caused by my body producing too many histamines. Do you have any recommendations?

— Connie J.

I find it difficult to justify steroids for treating hives (known as urticaria with severe cases advancing to deep tissue swelling known as angioedema), except for a severe episode associated with angioedema, and then only for several days. Corticosteroids are NOT generally indicated for long-term treatment.

Primary treatment is with antihistamines (especially the newer generation antihistamines such as Zyrtec). Most cases of hives are periodic, and episodes are usually treated with anti-histamines, and occasionally H1 and H2 blockers for long term treatment. Some doctors may run a treatment trial with leukotriene blockers such as Singulair, however this is not FDA approved for this purpose.

Rarely, hives may be seen with internal malignancy or lymphoma.

I advise you to seek a second opinion at a nearby medical center. First of all, establish whether you have hives or angioedema. Request a dermatology and immunology/oncology consultation if a definitive cause is still not evident. Given your large weight gain and chronic corticosteroid use, an endocrinology consultation may also be in order.

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4. I have a female friend, age 44, who takes many pills and has mastocytosis in her bones. She has to carry an Epy pen with her also. How many years do I expect her to stay around with us? I believe cocaine abuse mixed with Vicadin, Oxycotin, codeine, Valium, etc. may have led to this horrible disease. What can you tell me about this disease?

— Dennis B.

Narcotic and medication addictions are problematic when dealing with underlying diseases. They may indeed mask underlying medical disorders, but are not known to cause mastocytosis.

Mastocytosis is a disease of the immune system whose cause is unknown. It appears to involve genetic mutations and presents as a skin disorder (usually in children) and/or as a systemic disorder which involves multiple organs and bone marrow lesions in adults.

Mastocytosis is fortunately quite a rare disorder, and is associated with proliferation of mast cells (cells involved in the body's immune system response) in the skin and/or other organs. These mast cells contain various inflammation triggers, such as histamine, leukotrienes,and various cytokines, whose release is triggered by exercise, narcotics, NSAID medications (such as aspirin, ibuprofen etc), insect bites, physical irritation such as trauma, or simply rubbing or scratching the skin. The absence of organ involvement relates to a good prognosis and is often treated with H1 (Zyrtec, Benadryl, etc.), H2 (Tagamet, Zantac, etc.), and leukotriene (Singulair, etc.) blocker medications. Treatment is aimed at preventing mast cells from releasing inflammation triggers.

No treatment is effective to permanently reduce the number of tissue mast cells, and this is where various gene therapies and stem cell transplantation may have a future role.

The skin form of this disorder is associated with intense itching and redness around specific skin lesions, but is not itchy over uninvolved skin which is free of rash. The skin lesions are treated topically and H1 blocker medications are effective. This skin form rarely progresses to systemic disease in children, although it may occasionally progress in adults.

Systemic disease is more serious with multiple bone marrow lesions and several levels of organ involvement (such as skin, lymph nodes, bowel, liver, spleen, etc.). Symptoms often include nausea, vomiting, abdominal pain, abdominal distension, bone pain, multiple joint pain, chronic diarrhea, and various mood changes. The outlook is not so rosy in the presence of other blood disorders (often referred to as "cancer" such as lymphoma, and mast cell leukemia etc.) or impaired organ function resulting from organ infiltration.

Systemic disease requires aggressive treatment with interferon, corticosteroids (prednisone), and often the use of cytotoxic (anti-cancer) regimens to induce remission and improve the significant mortality of this disorder. Your friend's life expectancy will depend upon her disease involvement and her response to the treatments she is given.

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5. I have a friend who has had terrible diarrhea and stomach cramps for almost a month. Antibiotics have caused even MORE diarrhea. She stopped taking those meds, but hasn't had any relief. She has no appetite and when she does eat, she almost immediately gets diarrhea. What can she take to help stop this vicious cycle?

— Donna H.

Your friend has now entered the "chronic diarrhea" diagnostic category, and she requires proper investigation. The most important matter is to ensure hydration, nutrition and electrolyte balance. This can be rapidly evaluated by a complete examination accompanied by laboratory studies such as complete blood count and blood chemistry.

Complications and deaths with diarrhea are the result of electrolyte and hydration deficits caused by the diarrhea, not the diarrhea itself. Cultures and stool examination may be useful as will a stool assay to detect clostridium difficile toxin (often associated with antibiotic use). Other useful tests may include cultures, stool examination and endoscopy.

While undergoing testing, there are effective anti-diarrheal agents your doctor can prescribe, such as Imodium. These anti-diarrheal agents are not to be self-prescribed for diarrheal illness of over 4 days duration or when associated with fever, vomiting or abdominal pain.

The question of course is whether she has secretory diarrhea from infection, inflammatory diarrhea from invasive disease, an underlying disorder, or the usual common diarrhea induced by antibiotics. Some antibiotics are worse than others in causing diarrhea (most often by killing off good bacteria leaving resistant species behind), and some actually induce overgrowth of resistant bacteria, such as clostridium difficile, which can cause severe symptoms or even hospitalization.

Remember that our bowel function relies on a balance of different bacteria that is easily disturbed by antibiotic use. Probiotic yogurt (such as Actimel which contains active cultures of lactobacillus casei, L casei imunitas, L bulgaricus, and Streptococcus thermophilus) has been shown to prevent antibiotic-associated diarrhea as well as prevent Clostridium difficile associated diarrhea in hospitalized patients. To date, however, probiotic usage has no proven role in the treatment, only in preventing antibiotic-induced diarrheal illness.

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Editor's Notes:

Dr. Peter Hibberd is a doctor of medicine whose advice is based on over 25 years of outpatient and hospital-inpatient experience. He is a fellow and active member of the American Academy of Family Physicians, a career emergency medicine consultant, and an active member of the American College of Emergency Physicians. The previous are questions from our readers and answers from Dr. Hibberd. If you have a question, e-mail the doctor at askdrhibberd@newsmax.com. Dr. Hibberd will not reply directly, but look for your questions and his answers in future e-mails.

IMPORTANT: These responses are for informational purposes only. Please consult your primary care physician for a specific diagnosis and treatment options.



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Received on Wed Oct 31 2007 - 11:32:33 EDT

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