Thyroid lymphoma represents less than 1% of malignant thyroid tumors and its diagnosis is difficult. We report a 25 years old woman, admitted with the diagnosis of diffuse euthyroid goiter and thyroid cancer. She was subjected to a subtotal thyroidectomy and the pathological study of the surgical piece showed a Hodgkin lymphoma, subtype nodular sclerosis. The patient was treated with three cycles of chemotherapy, using cyclophosphamide, vincristine, procarbazine, prednisone, doxorubicin, bleomycin, vinblastin and radiotherapy. She refused to continue treatment after the third cycle and after 3 years and 5 months of follow up, is well and free of disease (Rev Méd Chile 2000; 128: 783-6).