title: Primary thyroid lymphoma with elevated free thyroxine level.
abstract: Primary thyroid lymphoma (PTL) is a rare form of thyroid cancer that is known to be associated with Hashimoto thyroiditis. This association is supported by the presence of elevated titres of both antithyroglobulin and antimicrosomal antibodies in up to 95 percent of patients with PTL. Most patients with PTL present with a rapidly enlarging neck mass and compressive symptoms. The majority of thyroid cancer patients have normal levels of thyroid hormones; they are rarely hyperthyroid, with no obvious clinical features of thyrotoxicosis. We describe a patient who presented with minimal clinical features of thyrotoxicosis despite having markedly elevated serum free thyroxine and suppressed serum thyroid-stimulating hormone levels.
authors.affiliation: Endocrine Unit, Department of Medicine, Hospital Universiti Sains Malaysia, Kubang Kerian 16100, Malaysia. jaiyati@yahoo.com
authors.forename: N
authors.initials: N
authors.lastname: Yahaya
authors.forename: S W
authors.initials: SW
authors.lastname: Din
authors.forename: M Z
authors.initials: MZ
authors.lastname: Ghazali
authors.forename: S
authors.initials: S
authors.lastname: Mustafa
mesh_terms: D000368:Aged; D001323:Autoantibodies / Q000097:blood / Q000378:metabolism; D050031:Hashimoto Disease / Q000097:blood; D006801:Humans; D008223:Lymphoma / Q000097:blood* / Q000175:diagnosis*; D008296:Malaysia; D008297:Male; D013963:Thyroid Hormones / Q000097:blood; D013964:Thyroid Neoplasms / Q000097:blood* / Q000175:diagnosis*; D013971:Thyrotoxicosis / Q000097:blood / Q000175:diagnosis; D013974:Thyroxine / Q000097:blood*; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods
chemical_list: D001323:Autoantibodies; D013963:Thyroid Hormones; C006606:anti-thyroglobulin; C056626:thyroid microsomal antibodies; D013974:Thyroxine