Hydatic cyst in the thyroid gland diagnosed by fine-needle aspiration biopsy

Area of Science:

• Endocrinology
• Parasitology
• Surgical Pathology

Background:

• Thyroid nodules are common, but parasitic cysts are rare causes.
• Hydatid cysts, typically affecting organs like the liver and lungs, can rarely involve the thyroid gland.

Observation:

• A 33-year-old male presented with a year-long thyroid swelling.
• Thyroid scans revealed a cold nodule, and ultrasonography showed multiple cystic nodules.
• Fine-needle aspiration biopsy (FNAB) was crucial for diagnosing a hydatid cyst.

Findings:

• Histopathology confirmed the diagnosis of a thyroid hydatid cyst post-subtotal thyroidectomy.
• The patient tolerated the FNAB without anaphylaxis, a potential complication.

Implications:

• Fine-needle aspiration biopsy (FNAB) is a valuable diagnostic tool for rare thyroid cystic lesions.
• This case expands the differential diagnosis for thyroid nodules and emphasizes the importance of considering parasitic infections.
• Early and accurate diagnosis through FNAB can guide appropriate surgical management and prevent complications.