Chronic Enteropathy Associated with SLCO2A1-Associated Primary Hypertrophic Osteoarthropathy in Female Patients: A Case Report and Literature Review

Abstract This paper reports a case of chronic enteropathy associated with the SLCO2A1 gene (CEAS) combined with primary hypertrophic osteoarthropathy (PHO). The patient was a 25-year-old woman with a normal onset of puberty who was admitted to our hospital four times due to intractable oedema and anaemia. She had a history of hyperhidrosis since childhood, and her parents were close relatives (cousins). Enteroscopy revealed stenotic ulcers on the ileocecal valve and the terminal ileum. Computed tomography enterography (CTE) and magnetic resonance enterography (MRE) showed segmental thickening of the ileum and terminal intestinal wall and centripetal narrowing of some intestinal cavities. MRE also showed a marked "comb sign" in the adjacent mesentery, and X-rays of both lower limbs showed thickening of the tibiofibular cortex. The CEAS pathogenic genes were screened by whole exome sequencing, and a homozygous missense mutation of p. Gly222Asp (c.664G>A) was found in the fifth exon of the SLCO2A1 gene, which was verified by Sanger sequencing. In conclusion, the patient was identified as CEAS with PHO associated with a SLCO2A1 gene mutation, but the patient is a young woman, which has rarely been reported in previous studies. In addition to reporting her case, the relevant literature was reviewed to improve clinicians' understanding of diseases associated with the SLCO2A1 gene.