Echinococcus granulosus infection, thyroid gland

This code signifies a parasitic infection of the thyroid gland caused by the larval stage of Echinococcus granulosus, commonly known as hydatid disease or echinococcosis. This condition involves the formation of hydatid cysts within the thyroid tissue, which can lead to thyroid dysfunction or palpable masses.

Apply this code when documentation explicitly states a diagnosis of echinococcosis or hydatid disease affecting the thyroid gland. This diagnosis is typically confirmed through imaging studies (e.g., ultrasound, CT, MRI) showing characteristic cystic lesions, often alongside serological tests.

• Ensure documentation specifies the thyroid gland as the affected site; otherwise, a more general echinococcosis code may be appropriate.
• Distinguish from other parasitic infections or non-parasitic thyroid cysts.
• Consider additional codes for any associated thyroid dysfunction (e.g., hypothyroidism, hyperthyroidism) if documented.