Secondary malignant lymphoma which simulated primary thyroid cancer

A patient with secondary thyroid lymphoma who complained of a neck mass was presented. Multiple nodules were detected in both lobes of the thyroid gla nd, which appeared as homogeneous hypoechoic masses on ultrasonogarphy (US) , low-density masses on computed tomography (CT), and areas of increased up take on gallium-67 scintigraphy. The residual thyroid gland was normal. Sur gery established a diagnosis of secondary thyroid lymphoma with no coexiste nt Hashimoto's thyroiditis but with cervical node involvement by lymphoma. Radiologic evidence of normal residual thyroid gland in a patient with thyr oid lymphoma may be a sign of secondary thyroid lymphoma. (C) 2000 Elsevier Science Inc. All rights reserved.