DOI: 10.36347/sjmcr.2016.v04i03.012

Pages: 159-161

Primary thyroid lymphoma consisted of 5% of all thyroid malignancy and mucosa associated lymphoid tissue (MALT) is a subset of B cell non Hodgkin lymphoma though they have a better prognosis than non MALT lymphoma but proper diagnosis is require for the course of treatment. There is always a challenge in diagnosing hashimoto’s thyroiditis as there is diffuse lymphocytic and plasma cells infiltration. In this case by FNAC it was reported as Hashimoto thyroiditis and due to increasing size thyroidectomy was done. But in histopathological examination it shows features of Hashimoto as well as lymphoma. Immunohistochemistry was done and it was Lambda –Kappa coaktail positive and additional complimentary marker was performed and were positive for CD20 and CD3 .The impression was Low grade diffuse lymphoma (MALTOMA) Immunohistochemistry plays a major role in differentiating the cases. Impression- Low grade diffuse lymphoma (MALTOMA).