Journal of Cytology
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Year : 2014  |  Volume : 31  |  Issue : 1  |  Page : 53-56

Extramedullary plasmacytoma of thyroid - a mimicker of medullary carcinoma at fine needle aspiration cytology: A case report

Department of Pathology, MVJ Medical College and Research Hospital, Bangalore, Karnataka, India

Correspondence Address:
Vidya Bhat
Department of Pathology, MVJ Medical College and Research Hospital, Dandupalaya, Kolathur(P), Hoskote, Bangalore - 562 114, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0970-9371.130710

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A rare case of extra medullary plasmacytoma (EMP) of thyroid gland in a 60 year old male, occurring against a background of Hashimoto's thyroiditis is reported. The fine needle aspiration cytology (FNAC) initially done as an outpatient procedure, showed atypical epithelial cells on a background of amyloid. Considering these findings we gave a diagnosis of medullary carcinoma. Histology of the total thyroidectomy specimen showed an extensive infiltration of neoplastic plasma cells against a background of Hashimoto's thyroiditis, with a bizarre Hurthle cell change. Immunohistochemistry on the histology sections confirmed the diagnosis of solitary plasmacytoma of thyroid against a background of Hashimoto's thyroiditis.

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