Silent thyroiditis (patient information)

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Assosciate Editor(s)-In-Chief: Prashanth Saddala M.B.B.S, Furqan M M. M.B.B.S[2]

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Silent thyroiditis is an inflammation of the thyroid gland in which the person alternates between hyperthyroidism and hypothyroidism.

The earliest symptoms result from an overactive thyroid gland (hyperthyroidism). These symptoms may last for 3 months or fewer. Later symptoms may be of an underactive thyroid (including fatigue and cold intolerance) until the thyroid recovers.

Symptoms are usually mild and may include:

• Fatigue
• Frequent bowel movements
• Heat intolerance
• Increased appetite
• Increased sweating
• Irregular menstrual periods
• Irritability
• Muscle cramps
• Nervousness, restlessness
• Palpitations
• Weakness
• Weight loss

The cause of this type of thyroiditis is unknown. The disease affects women more often than men.

Common risk factors in the development of silent thyroiditis include lithium, radiation therapy in Hodgkin’s lymphoma, certain autoimmune conditions such as SLE and lymphocytic hypophysitis.

A physical examination may show:

• Rapid heart rate
• Shaking hands

Tests may show:

• Decreased radioactive iodine uptake
• Increased blood levels of the thyroid hormones T3 and T4
• White blood cells (lymphocytes) on a thyroid biopsy

Call your healthcare provider if you have symptoms of this condition.

Treatment is based on symptoms. Beta-blockers relieve rapid heart rate and excessive sweating.

There are no preventive methods for silent thyroiditis.

Generally, the prognosis of silent thyroiditis is good. The acute phase ends within 3 months.

• Some people may develop hypothyroidism over time. Regular follow-ups with a doctor are recommended.

• Hypothyroidism

http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001425/

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