

![]() |
This condition can occur with other autoimmune disorders. In rare cases, thyroid cancer may develop.
|
![]() |
A goiter is an enlargement of the thyroid gland. It is not cancer. See also: Colloid nodule goiter; Toxic nodule goiter.
|
|
|
Goiter is a swelling in the neck, caused by a malfunction of the thyroid gland. The thyroid gland, located in the base of the neck, absorbs iodine from the blood and uses this to produce hormones that regulate many body functions, including EXAMPL...
|
|
|
An example of grade III (large and visible) goiter. Most cases of goiter in the developing world are due to an iodine deficiency. Unable to meet the body's hormonal needs, the thyroid becomes enlarged to compensate. [© Lester V. Bergman/Corbis. Re...
|
|
Goiter is an enlargement of the thyroid gland. It may be diffuse, involving all thyroid tissue, or it may be caused by one or more lumps (nodules)—called nodular goiter. Diffuse goiter reflects an underlying thyroid problem, most commonly iodine d...
|
|
Goiter refers to any visible enlargement of the thyroid gland.
|
![]() |
Hypothyroidism is a condition in which the thyroid gland does not make enough thyroid hormone. See also: Chronic thryoiditis (Hashimoto's disease; Subacute thyroiditis; Silent thyroiditis; Neonatal hypothyroidism.
|
|
|
Hypothyroidism, or a condition of insufficient thyroid hormone in the body, develops when the thyroid gland fails to produce or secrete as much thyroxine (T 4 ) and triiodothyronine (T 3 ) as the body needs. Because T 4 regulates such essential fu...
|
|
Hypothyroidism, or underactive thyroid, develops when the thyroid gland fails to produce or secrete as much thyroxine (T 4 ) and triiodothyonine (T 3 ) as the body needs. Because these thyroid hormones regulate such essential functions as heart ra...
|
|
Hypothyroidism, or underactive thyroid, develops when the thyroid gland fails to produce or secrete as much thyroxine (T 4 ) as the body needs. Because T 4 regulates such essential functions as heart rate, digestion, physical growth, and mental de...
|
|
|
Birth defects are physical abnormalities that are present at birth; they are also called congenital abnormalities. More than 3,000 have been identified.
|
![]() |
Question: Does folic acid use help prevent birth defects? Answer: There is good evidence that you can reduce the risk of certain birth defects (spina bifida , anencephaly, and some heart defects) by taking a daily dose of 400 micrograms folic acid...
|
|
Any unusual variation or abnormality in the shape, structure, and/or function of an organ, body part, or tissue is commonly referred to as a birth defect. However, congenital anomaly is the more accurate and preferred term, since birth defect can ...
|
|
Defects present at birth, resulting from hereditary factors, environmental influences, or maternal illness. Birth or congenital defects are present at birth and result from hereditary factors, environmental influences, or maternal illness. Such de...
|
|
A congenital anomaly may be viewed as a physical, metabolic, or anatomic deviation from the normal pattern of development that is apparent at birth or detected during the first year of life. Under this definition, Mendelian genetic disorders (e.g....
|
|
Imprecise term, primarily used by laypeople, to refer to mental conditions. This term is widely used, but has no precise definition. In fact, many mental health professionals feel the implied distinction between mental and physical disorders overs...
|
|
Negative symptoms are thoughts, feelings, or behaviors normally present that are absent or diminished in a person with a mental disorder.
|
|
Positive symptoms are thoughts, behaviors, or sensory perceptions present in a person with a mental disorder, but not present in people in the normal population.
|
|
|
Cardiovascular disease is a general diagnostic category consisting of several separate diseases of the heart and circulatory system. Cardiovascular diseases have been the major health problem and the leading cause of death in the United States for...
|
|
|
The cardiovascular system comprises the heart, veins, arteries , and capillaries, which carry blood back and forth from the heart to the lungs (pulmonary circulation) and from the heart to the rest of the body (systemic circulation). The heart wor...
|


