What is isthmus in thyroid?

The isthmus in the thyroid is a narrow band of tissue that connects the two lobes of the thyroid gland in the neck. It is located just below the cricoid cartilage, which is part of the larynx.

The thyroid gland is an endocrine gland that produces hormones responsible for regulating metabolism, growth, and development. It consists of two lobes on either side of the trachea, connected by the isthmus.

The size and shape of the isthmus can vary among individuals. In some cases, it may be absent, and the lobes of the thyroid gland are directly connected.

The isthmus does not have any specific functional role in hormone production. However, abnormalities or diseases affecting the thyroid gland, such as goiter or thyroid nodules, may also involve the isthmus. These conditions can cause enlargement, inflammation, or the development of cysts or tumors in the isthmus.

In medical imaging, such as ultrasounds or CT scans, the isthmus is often examined to assess the overall health of the thyroid gland. Doctors may focus on the isthmus when evaluating thyroid conditions and palpating the neck during a physical examination.

Overall, the isthmus is an important anatomical structure in the thyroid gland, connecting the two lobes and serving as a potential site for various thyroid disorders.