title: Secondary malignant lymphoma which simulated primary thyroid cancer.
abstract: A patient with secondary thyroid lymphoma who complained of a neck mass was presented. Multiple nodules were detected in both lobes of the thyroid gland, which appeared as homogeneous hypoechoic masses on ultrasonogarphy (US), low-density masses on computed tomography (CT), and areas of increased uptake on gallium-67 scintigraphy. The residual thyroid gland was normal. Surgery established a diagnosis of secondary thyroid lymphoma with no coexistent Hashimoto's thyroiditis but with cervical node involvement by lymphoma. Radiologic evidence of normal residual thyroid gland in a patient with thyroid lymphoma may be a sign of secondary thyroid lymphoma.
authors.affiliation: Department of Radiology, Shinshu University School of Medicine, 3-1-1 Asahi, 390-8621, Matsumoto, Japan. shodayu@gipac.shinshu-u.ac.jp
authors.forename: S
authors.initials: S
authors.lastname: Takashima
authors.forename: F
authors.initials: F
authors.lastname: Takayama
authors.forename: M
authors.initials: M
authors.lastname: Momose
authors.forename: K
authors.initials: K
authors.lastname: Shingu
authors.forename: S
authors.initials: S
authors.lastname: Sone
mesh_terms: D000328:Adult; D003131:Combined Modality Therapy; D003937:Diagnosis, Differential; D003952:Diagnostic Imaging; D005260:Female; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006801:Humans; D016393:Lymphoma, B-Cell / Q000175:diagnosis*; D008224:Lymphoma, Follicular / Q000175:diagnosis*; D013964:Thyroid Neoplasms / Q000175:diagnosis / Q000556:secondary*