Annular pancreas in Trichorhinophalangeal syndrome type II with 8q23.3-q24.12 interstitial deletion

Qi Li, Zhen Zhang, Yuchun Yan, Ping Xiao, Zhijie Gao, Wei Cheng, Lin Su, Kaihui Yu, Hua Xie, Xiaoli Chen, Qian Jiang, Long Li

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Trichorhinophalangeal syndrome type II (TRPS II, OMIM # 150230) is a rare autosomal dominant genetic disorder characterized by craniofacial and skeletal abnormalities. Loss of functional copies of the TRPS1 gene at 8q23.3 and the EXT1 gene at 8q24.11 are considered to be responsible for the syndrome. Case Presentation: Herewith, we report an 8-year-old girl with sparse scalp hair, bulbous nose, thin upper lip, broad eyebrows, phalangeal abnormalities of both hands/toes, multiple exostoses, mild intellectual impairment and severe malnutrition. In addition, the patient also had annular pancreas, a rare co-existing feature in patients with TRPS II. Conclusions: A contiguous 5.47 Mb deletion involving 8q23.3-q24.12 was detected by array comparative genomic hybridization (aCGH), leading to haploinsufficiency of 10 protein coding genes, 1 long non-coding RNA and 1 microRNA. Quantitative PCR (qPCR) examination confirmed half-reduced DNA copy of the patient and normal expression of both parents, indicating a de novo origin of the deletion and complete penetrance of the mutation.

Original languageEnglish (US)
Article number201
JournalMolecular Cytogenetics
Volume8
Issue number1
DOIs
StatePublished - Dec 15 2015

Keywords

  • 8q23.3-q24.12 deletion
  • Annular pancreas
  • Chinese
  • Trichorhinophalangeal syndrome type II
  • qPCR

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Genetics
  • Genetics(clinical)
  • Biochemistry, medical

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