<prompt> All of the following are true about Lymphoma of the thyroid except:More common in femalesSlow growingClinically confused with undifferentiated tumoursMay present with respiratory distress and dysphagia  <response>: Lymphoma of the thyroid is a rapidly growing malignancy similar to anaplastic carcinoma. Sabiston writes - This diagnosis should be considered in patients who present with a goitre, especially one that has apparently grown significantly in a short period.LymphomaLymphoma is a rare malignancy of thyroid 1.Most are of non-Hodgkins B-cell type.Although the disease can arise as part of a generalized lymphomatous condition, most thyroid lymphomas develop in patients with chronic lymphocytic thyroiditis Hashimotos ds.Presenting symptoms are :- rapidly enlarging mass similar to anaplastic ca but is often painless.- acute respiratory distress- hoarseness- dysphagia- feverDiagnosis is usually suggested by FNA biopsy, although core needle or open biopsy may be necessary for definitive diagnosis.Treatment- Thyroid lymphoma responds rapidly to chemotherapy CHOP - cyclophosphamide, doxorubicin, vincristine and prednisone- Combined tt with radiotherapy chemotherapy is recommended.- Surgical resection is recommended to alleviate pressure symptoms. 