Abstract

Thyroid gland tumours with various types were basically divided into benign and malignant ones. Comparing with thyroid carcinoma (epithelial cancer) in which the papillary carcinoma accounting for over 75% of all types of thyroid cancer, the non - epithelial cancer is rare. Among these, lymphoma could be met. Lymphomas were frequently from lymph node but a considerable proportion of them originated from the other organs such as MALT, skin… and thyroid gland. The lymphomas of thyroid gland could be primary or secondary of the advanced lymphomas of the other organs spreading to thyroid gland. In the world, thyroid lymphoma was very rare, accounting for 2 - 5% of thyroid cancer and 1 - 2.5% of all lymphomas in the body. There was no data noticed in Vietnam. We presented a female patient, age of 71 years, came to hospital due to the goiter enlarging rapidly. After clinical exams, the patient was checked by ultrsounld and CT Scans. The images shown that the lesion was spreading throught out 2 lobes, heterogenous and increasing perfusion without neck lymph node discovered. FNA was rich in small lymphocyte with litle atypical feature. The patient was treated by radical operation. Histopathology was diagnosed as lymphoma non – Hodgkin and after IHC staining, the result was small cell lymphoma non – Hodgkin, B cell (SLL). Although it is very rare, we should think of a case of primary thyroid lymphoma with the quick enlargement of a goiter, spreading lesion of two lobes and rich in lymphocyte.