Microfilaria in fine needle aspirate of thyroid nodule

Richa Bhartiya, Mahasweta Mallik, Nawanita Kumari, Manish Kumar

Thyroid Research and Practice 2016 13(2):86-88

Filariasis is a major public health problem in tropical countries including India. About 90% of cases of lymphatic filariasis are caused by infection with Wuchereria bancrofti and rest by Brugia malayi in Southeast Asia. Filariasis is transmitted by the bite of Culex mosquitoes. The diagnosis of it is conventionally made by demonstrating microfilaria in the peripheral blood smear. Microfilaria have been incidentally detected in fine needle aspiration cytology smears from various sites. However, the presence of filarial worm in thyroid aspirate is unusual. We report a case in which aspiration cytology revealed presence of microfilaria in thyroid nodule.

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