ABSTRACT
Presence of microfilaria in the thyroid gland is a rare finding. Filariasis is a common public health problem in the Indian sub-continent. Most of the cases of microfilaria in thyroid gland reported in the literature are associated with goiter and thyroid neoplasms. Here, we present a rare case that showed microfilaria on fine needle aspiration cytology of solitary thyroid nodule.
Subject(s)
Adult , Animals , Biopsy, Fine-Needle , Female , Filariasis/diagnosis , Humans , Microfilariae/isolation & purification , Thyroid Gland/pathology , Thyroid Nodule/parasitologyABSTRACT
Primary hydatidosis located in the thyroid is an infrequent finding; even in endemic regions, however, a few cases of secondary hydatid cyst of thyroid have been reported in literatures. A 17-year old female was admitted with history of a slow growing painless thyroid nodule for the last two years. Pre-operative investigations, including thyroid scanning and aspiration of the nodule, did not help in establishing the diagnosis that was later confirmed by histological examination. Histopathological examination of the specimen revealed a hydatid cyst with daughter cyst. In endemic areas such as Iran, any growing mass or tumor should arouse suspicion of hydatid disease
Subject(s)
Humans , Female , Thyroid Nodule/diagnosis , Thyroid Nodule/parasitology , Biopsy, Fine-Needle , Albendazole , Diagnosis, DifferentialABSTRACT
A case of parasitic thyroid nodule is presented. The patient was a non symptomatic 53-year-old white woman, on irregular course of L-thyroxine to treat hypothyroidism due to Hashimoto's thyroiditis. Without a history of thyroid trauma or surgery, she presented a 1.6 x 0.7 x 0.5cm right pre-laryngeal lymph node-like mass which, on ultrasonography, appeared distinct from the gland. TSH, thyroid peroxidase antibody and thyroglobulin antibody serum levels were elevated and T4-free level was normal. Thyroid and total body 99mTc isonitrile scintiscan showed a topic thyroid without radionuclide uptake in the nodule. Fine-needle aspiration of the nodule showed epithelial cells with nuclear atypia and oncocytic changes plus intense lymphoid infiltration and germinative center formation, simulating lymph node metastasis of papillary thyroid carcinoma. Conventional biopsy revealed a parasitic thyroid nodule with Hashimoto's chronic thyroiditis. Parasitic thyroid nodule must always be remembered so that unnecessary surgical assessment and undesirable sequels may be avoided