Disorders of thyroid glands are classified into Hypothyroidism- deficient secretion and Hyperthyroidism-due to excessive secretion. In most hyperthyroidism cases both T3 and T4 plasma levels are raised. It is more common in females.

Disorders of thyroid glands are classified into hyperthyroidism- excessive secretion and Hypothyroidism- deficient secretion. Hypothyroidism is is due to suboptimal circulating levels of one or both T3 and T4.

Hypoparathyroidism is the condition when there is inadequate secretion or action of parathyroid hormone (PTH). This disorder may be inhherited or due to other causes. Symptoms include weakness, muscle cramps and abnormal sensations like burning and numbness.

Goiter is defined as non-inflammatory enlargement of thyroid glands. There are several factors causing Goiter. Iodine deficiency is in the diet is considered as the most common factor.

Congenital adrenal hyperplasia comprises a group of inherited disorders of synthesis of adrenal steroids. Clinical features occur because of reduction or absence of hormones blocked by enzyme deficiency.