title: [Clinicopathologic characteristics of primary thyroid-like follicular carcinoma in kidney].
abstract: OBJECTIVE
  To explore the clinicopathological characteristics of primary thyroid-like follicular carcinoma of the kidney.
  
  
  METHODS
  A case of primary thyroid-like follicular carcinoma of the kidney was studied with histology and immunohistochemical staining, and its clinical and pathological findings were further analyzed with review of the literature.
  
  
  RESULTS
  The patient was a 26-year-old asymptomatic woman who had a kidney mass during her annual physical examination. The tumor was well-circumscribed. Pathologically, the tumor showed follicular structures with colloid-like material in the lumina. Immunohistochemically, the tumor cells showed intense staining for CK7 and vimentin and negative for thyoid transcripation factor-1, thyroglobulin, thyoid peroxidase and RCC.
  
  
  CONCLUSIONS
  The diagnosis of primary thyroid-like follicular carcinoma of the kidney is based on the characteristic follicular architecture with colloid-like material, and the metastasis from a thyroid follicular carcinoma must be excluded clinically and pathologically before making the final diagnosis.
authors.affiliation: Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing 100730, China.
authors.forename: Huan-wen
authors.initials: HW
authors.lastname: Wu
authors.forename: Wen-jing
authors.initials: WJ
authors.lastname: Chen
authors.forename: Yan
authors.initials: Y
authors.lastname: You
authors.forename: Quan-cai
authors.initials: QC
authors.lastname: Cui
authors.forename: Tong-hua
authors.initials: TH
authors.lastname: Liu
mesh_terms: D018263:Adenocarcinoma, Follicular / Q000378:metabolism / Q000473:pathology*; D000328:Adult; D004268:DNA-Binding Proteins / Q000378:metabolism; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053552:Keratin-7 / Q000378:metabolism; D007680:Kidney Neoplasms / Q000378:metabolism / Q000473:pathology*; D009392:Nephrectomy / Q000379:methods; D015260:Neprilysin / Q000378:metabolism; D013964:Thyroid Neoplasms / Q000378:metabolism / Q000473:pathology*; D014157:Transcription Factors; D014746:Vimentin / Q000378:metabolism
chemical_list: D004268:DNA-Binding Proteins; D053552:Keratin-7; C504003:TTF1 protein, human; D014157:Transcription Factors; D014746:Vimentin; D015260:Neprilysin