Cytology of Hashimoto's Thyroiditis Coexistent with Papillary Thy- roid Carcinoma: A Case Report

The co-existence of cytological evidence for Hashimoto’s thyroiditis (HT) and papillary thyroid carcinoma (PTC) is uncommon in routine practice. We present the case of a 56 year-old female who presented with bilateral thyroid nodules and PTC was suspected based on the fine needle aspiration cytology. Smears showed high cellularity, neoplastic cells with squamoid cytoplasm and enlarged nuclei with pseudoinclusions. Hurthle cells and lymphocytes were also noted. Colloid was scant. Histopathological examination revealed HT with PTC. There was no evidence of metastasis. Cytotechnicians and pathologists should be vigilant for the presence of neoplastic cells in smears during routine screening that show Hurthle cells and lymphocytes.