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Hereditas(Beijing) ›› 2022, Vol. 44 ›› Issue (11): 1079-1086.doi: 10.16288/j.yczz.22-210

• Genetic Resource • Previous Articles    

Diagnosis, treatment and genetic analysis of a case with fibrocalculous pancreatic diabetes

Min Shen1(), Yong Gu1, Changjiang Ying2, Mei Zhang1, Tao Yang1, Yang Chen1()   

  1. 1. Department of Endocrinology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
    2. Department of Endocrinology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, China
  • Received:2022-06-21 Revised:2022-09-01 Online:2022-11-20 Published:2022-09-07
  • Contact: Chen Yang E-mail:drshenmin@163.com;drchenyang@njmu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(81900708);Postgraduate Research & Practice Innovation Program of Jiangsu Province(JX10213850);Sinocare Diabetes Foundation(2021SD02)

Abstract:

Fibrocalculous pancreatic diabetes (FCPD) is a rare type of diabetes mellitus with both impaired endocrine and exocrine functions of the pancreas. In this report, we presented a case with FCPD, who had recurrent abdominal pain since early childhood and was diagnosed with diabetes mellitus at the age of 25, with pancreatic calcification on abdominal computed tomography (CT) scan. Genetic testing revealed two homozygous mutations in the SPINK1 gene (c.194+2T>C and -191-24G>A). Both the homozygous variants were shared by his unaffected sibling, and the heterozygous variants had been verified on their unaffected parents. Based on this case and 90 other reported cases in China, we retrospectively analyzed the clinical characteristics of FCPD. It is recommended that unclassified diabetic patients with a lean body type, no ketosis tendency but poor islet function should be considered for the possibility of FCPD. Pancreatic imaging and genetic testing may be beneficial for the differential diagnosis. This study improves our understanding and management of FCPD, and also enriches clinical evidence for subsequent research on pathogenic mechanisms and drug target screening.

Key words: pancreatic fibrocalcification, diabetes, SPINK1, differential diagnosis