Echinococcus granulosus infection of thyroid

This code signifies an infection of the thyroid gland caused by the larval stage of the tapeworm Echinococcus granulosus, commonly known as hydatid disease or echinococcosis. This parasitic infestation leads to the formation of hydatid cysts within the thyroid tissue, potentially causing goiter, compression symptoms, or thyroid dysfunction.

Use this code when documentation confirms a diagnosis of hydatid cyst or echinococcosis specifically affecting the thyroid gland. This diagnosis is typically supported by imaging studies (ultrasound, CT, MRI) showing characteristic cystic lesions, serological tests for Echinococcus antibodies, and sometimes fine needle aspiration or surgical biopsy.

• Ensure documentation explicitly states thyroid involvement; otherwise, a more general echinococcosis code may be appropriate.
• Consider co-reporting codes for any associated complications, such as hypothyroidism or compressive symptoms, if documented.
• Distinguish from other types of thyroid cysts or infections, which would be coded differently.