The thyroid cysts are fluid filled sacs which are as such of no importance. The size of the thyroid cysts varies from very small (i.e. less than 1 cm) to very large. The thyroid cysts in most cases arise all of a sudden. As it is a known fact that cyst may be defined as a region which contains fluid of any kind. Sometimes even the thyroid nodules may be entirely cystic in nature in that case there is no solid substances inside the fluid. The nodules which are nothing but the thyroid cysts expand and all of a sudden tend to enlarge and all these take place due to bleeding or the hemorrhage so developed. It has been observed that in some case, the thyroid cysts so formed tend to enlarge and symptoms are produced in the regions of the body like the neck. The symptoms so observed are:

• Pain in the neck accompanied by difficulty in swallowing
• Compression of the vocal cords which result in further change in the quality of the voice.

The thyroid cysts which form are of various shapes and sizes and vary according to the mount of fluid present in them for instance they can be either fully filled or p;artially filled and accordingly the intensity can be known. also the amount of the fluid present inside the thyroid cysts is an important factor in deciding whether the cysts so formed is having a risk for harboring thyroid cancer or not.

It has been observed that the cysts which are entirely filled with fluid have a lower risk of forming thyroid cancer as compared to the thyroid cysts which have solid components contained in them. the diagnosis of a cyst can b done as follows:

• Ultrasound
• Thyroid biopsy
.

Ultrasound though a modern technique is not used vastly instead the thyroid aspiring biopsy is used. In this case, fluid is taken from the cyst. It is also an uncommon method and used in less than 15% people. In the cases where there are large cysts or are complex then they are aspirated using a fine needle to check for the possibility of any cancer or malignancy. the ultrasound biopsies are done for the thyroid cystic nodules and are useful in order to ensure that the materials so examined contains other thyroid cells in addition to the cystic fluids.

After the diagnosis of the thyroid cysts they are subject to treatment .the treatment for the same can be carried out by puncturing the cyst with a needle and taking out the fluid from it.if this occurs again and again then surgery is done in such cases In some cases the multiple cysts are also formed and for their removal, surgery is the best alternative.