title: Different RET gene mutation-induced multiple endocrine neoplasia type 2A in 3 Chinese families.
abstract: BACKGROUND
  Multiple endocrine neoplasia type 2A (MEN2A) is a condition with inherited autosomal dominant mutations in RET (rearranged during transfection) gene that predisposes the carrier to extremely high risk of medullary thyroid cancer (MTC) and other MEN2A-associated tumors such as parathyroid cancer and/or pheochromocytoma. Little is reported about MEN2A syndrome in the Chinese population.
  
  
  METHODS
  All members of the 3 families along with specific probands of MEN2A were analyzed for their clinical, laboratory, and genetic characteristics. Exome sequencing was performed on the 3 probands, and specific mutation in RET was further screened on each of the family members.
  
  
  RESULTS
  Different mutations in the RET gene were identified: C634S in Family 1, C611Y in Family 2, and C634Y in Family 3. Proband 1 mainly showed pheochromocytoma with MTC, both medullary thyroid carcinoma and pheochromocytoma were seen in proband 2, and proband 3 showed medullary thyroid carcinoma.
  
  
  CONCLUSIONS
  The genetic evaluation is strongly recommended for patients with a positive family history, early onset of age, or multiple sites of masses. If the results verified the mutations of RET gene, thyroidectomy should be undertaken as the guide for better prognosis.
authors.affiliation: Department of Urology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, PR China Department of Bio-Medical Sciences, Philadelphia College of Osteopathic Medicine, Philadelphia, PA.
authors.forename: Qiuli
authors.initials: Q
authors.lastname: Liu
authors.forename: Dali
authors.initials: D
authors.lastname: Tong
authors.forename: Wenqiang
authors.initials: W
authors.lastname: Yuan
authors.forename: Gaolei
authors.initials: G
authors.lastname: Liu
authors.forename: Gang
authors.initials: G
authors.lastname: Yuan
authors.forename: Weihua
authors.initials: W
authors.lastname: Lan
authors.forename: Dianzheng
authors.initials: D
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Zaoming
authors.initials: Z
authors.lastname: Huang
authors.forename: Yao
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Jiang
mesh_terms: D000328:Adult; D019943:Amino Acid Substitution; D044466:Asian People / Q000235:genetics; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018813:Multiple Endocrine Neoplasia Type 2a / Q000235:genetics*; D009154:Mutation; D010375:Pedigree; D051096:Proto-Oncogene Proteins c-ret / Q000235:genetics*; D055815:Young Adult
chemical_list: D051096:Proto-Oncogene Proteins c-ret; C099282:RET protein, human