Abstract:Objective To improve the level of clinical diagnosis and treatment of primary thyroid lymphoma (PTL) by analyzing its clinical characteristics, summarizing the diagnosis and treatment experience of this disease. Methods A retrospective study on clinical, radiological and pathological data was performed to 15 PTL patients diagnosed and treated in our hospital between 2012 and 2021. Results Of all the 15 patients, 9 were male and 6 were female with an average age of 58 years (ranged from 41 to 81 years) at the time of diagnosis. The average time to clarify diagnosis was 10 months (ranged from 0.06 to 36 months). Of them, 14 sought medical treatment for neck mass. All the patients were diagnosed with non-Hodgkin’s lymphoma.The pathological subtypes were diffuse large B cell lymphoma in 8 patients, mucosaassociated lymphoid tissue lymphoma in 6, and follicular lymphoma in the other one. Except for 3 lost to follow-up, no recurrence or death occurred in the other follow-up patients. Conclusions PTL is a rare thyroid malignancy, mainly manifested as painless neck masses in clinical practice. The diagnosis depends on histopathology and immunohistochemical examination, and the pathological type is mainly diffuse large B cell lymphoma. At present, chemotherapy is the main treatment.