Thyroid cancer patients experienced significant weight gain after total thyroidectomy, with an increase of 61.3 ± 10.1 kg at baseline to 61.8 ± 10.2 kg at 3 to 4 year follow-up (P. An unexplained weight change is one of the most common signs of a thyroid disorder. Weight gain may indicate low levels of thyroid hormones, a condition called hypothyroidism. Conversely, if your thyroid produces more hormones than your body needs, you can lose weight unexpectedly.
Unlike hyperthyroidism and hypothyroidism, thyroid cancer doesn't cause symptoms such as weight changes, heart palpitations, and thinning hair. The tumor can grow to invade nearby tissue and can spread (metastasize) to the lymph nodes in the neck. Sometimes, cancer cells can spread beyond the neck to the lungs, bones, and other parts of the body. Because BMR in patients with hypothyroidism is decreased (see hypothyroidism brochure), an underactive thyroid is usually associated with some weight gain.
Weight gain is usually greater in people with more severe hypothyroidism. However, the decrease in BMR due to hypothyroidism is usually much less dramatic than the marked increase seen in hyperthyroidism, leading to more modest alterations in weight due to thyroid underactivity. The cause of weight gain in hypothyroid individuals is also complex and may not be related to excessive fat accumulation. Most weight gain in hypothyroid individuals is due to excessive salt and water accumulation.
Massive weight gain is rarely associated with hypothyroidism. In general, 5-10 pounds of body weight can be attributed to the thyroid, depending on the severity of the hypothyroidism. Finally, if weight gain is the only symptom of hypothyroidism that is present, the weight gain is less likely to be due solely to the thyroid. These can include hoarseness, thyroid pain, and difficulty swallowing that doesn't go away for weeks or months.
You'll also receive emails from Mayo Clinic with the latest cancer news, research and care. Other causes of hypothyroidism include temporary inflammation of the thyroid or medications that affect thyroid function. Sometimes, a drug that blocks the effects of radiation on the thyroid is given to people who live near nuclear power plants in the United States. Even with more advanced cancers that require surgery, most people don't need radioactive iodine, Morris adds.
Another common treatment for hyperthyroidism is antithyroid medication, which aims to reduce the amount of hormones produced by the thyroid. In this nationwide population-based cohort study, higher BMI and larger WC were significantly associated with an increased risk of thyroid cancer in both men and women after adjustment for smoking, alcohol use, physical activity, diabetes, hypertension, and dyslipidemia. Once hypothyroidism has been treated and thyroid hormone levels are in the normal range, the ability to gain or lose weight is the same as in people who don't have thyroid problems. The incidence rate of thyroid cancer was calculated by dividing the number of incident cases by the total follow-up period and was reported by 1000 person-years.
Once the gland is destroyed or removed by surgery, most patients should start taking thyroid hormones in pill form. parathyroid gland cancers are very rare; there are probably fewer than 100 cases each year in the United States. However, another prospective study reported that CC had no significant association with thyroid cancer risk27.It is an autoimmune disorder that attacks the thyroid gland and triggers the release of high levels of thyroid hormones. Benign thyroid nodules can sometimes be left alone (not treated) and closely watched, as long as they don't grow or cause symptoms.
If your levels are out of control, it's a sign that you're dealing with a thyroid condition other than cancer, says Lorch. Discuss your options with a genetic counselor who can explain your risk for thyroid cancer and your treatment options. . .