title: Metastasis to the choroid plexus from thyroid cancer: case report.
abstract: Thyroid cancer is not a common primary cancer causing intracranial metastasis. Here we report a 74-year-old woman with magnetic resonance imaging (MRI) demonstrating a 4 cm round, heterogeneously enhancing mass in the trigone of the right lateral ventricle. Systemic screening by computed tomography (CT) examination detected a 20 mm nodule with calcification in the thyroid, multiple well circumscribed nodules in bilateral lung filed, and a bone metastasis to the right dorsal rib. Cerebral angiography demonstrated a hypervascular mass fed from anterior and posterior choroidal arteries. Tumor biopsy via parietal transcortical approach confirmed a thyroid carcinoma metastasis to the choroid plexus. Of the 33 reported cases of choroid plexus metastasis, 14 (42%) are from kidney and 3 (9%) from thyroid cancer, which appears to be overrepresented considering their prevalence among all brain metastasis. There may be seed-and-soil relationship between thyroid cancer and choroid plexus.
authors.affiliation: Department of Neurosurgery, Dokkyo Medical University.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Kitagawa
authors.forename: Fumi
authors.initials: F
authors.lastname: Higuchi
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Abe
authors.forename: Hadzuki
authors.initials: H
authors.lastname: Matsuda
authors.forename: Phyo
authors.initials: P
authors.lastname: Kim
authors.forename: Keisuke
authors.initials: K
authors.lastname: Ueki
mesh_terms: D018263:Adenocarcinoma, Follicular / Q000175:diagnosis / Q000532:radiotherapy / Q000556:secondary* / Q000601:surgery; D000368:Aged; D001859:Bone Neoplasms / Q000556:secondary; D002533:Cerebral Angiography; D016545:Choroid Plexus Neoplasms / Q000175:diagnosis / Q000532:radiotherapy / Q000556:secondary*; D003131:Combined Modality Therapy; D016371:Cranial Irradiation; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes / Q000627:therapeutic use; D020547:Lateral Ventricles / Q000000981:diagnostic imaging / Q000473:pathology*; D008175:Lung Neoplasms / Q000556:secondary; D008279:Magnetic Resonance Imaging; D008579:Meningioma / Q000175:diagnosis; D009366:Neoplasm Seeding; D012272:Ribs; D013964:Thyroid Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D013965:Thyroidectomy
chemical_list: D007457:Iodine Radioisotopes