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PubMed This is a summary of 44 peer-reviewed journal articles Updated
Gastroenterology · Chronic Enteropathy Associated with SLCO2A1

Chronic Enteropathy Associated with SLCO2A1 (CEAS): A Patient Guide

At a Glance

CEAS is a rare inherited condition caused by SLCO2A1 mutations that create multiple small-intestinal ulcers. Slow blood and protein loss can cause iron-deficiency anemia, fatigue, low protein levels, and swelling, so care focuses on replacement and monitoring for strictures.

Chronic enteropathy associated with SLCO2A1 (CEAS) is a rare genetic condition that affects the small intestine, causing persistent ulcers and the loss of vital nutrients [1][2]. For many years, this condition was known as chronic nonspecific multiple ulcers of the small intestine (CNSU). The name was updated once researchers discovered that it is caused by mutations in the SLCO2A1 gene, which normally helps the body transport and recycle prostaglandins—lipid mediators derived from fatty acids that play a crucial role in protecting the lining of the digestive tract [3][4].

The hallmark of CEAS is the presence of multiple shallow ulcers, primarily located in the ileum (the lower part of the small intestine) [5]. Unlike many other bowel diseases, these ulcers tend to leak blood and protein slowly and steadily over time rather than causing sudden, severe bleeding [6]. This persistent loss leads to chronic iron-deficiency anemia and hypoproteinemia (low protein levels), which can result in significant fatigue and swelling in the legs and feet, known as edema [7][8].

One of the most important things for patients to understand is that CEAS has a different underlying pathophysiology than more common conditions like Crohn’s disease [5]. Because CEAS is a monogenic enteropathy rather than a conventional autoimmune disorder, standard medications for inflammatory bowel disease—such as steroids and biologics—often have limited or inconsistent benefit [9][10]. However, do not stop or change any prescribed treatments on your own without discussing it with your gastroenterologist, as these medications may be necessary for other reasons. Recognizing this distinction is vital because it allows you and your care team to move away from ineffective treatments and focus on managing the specific needs of your condition [2].

Living with CEAS requires long-term, vigilant supportive care to replace the iron and protein your body loses [2][11]. Additionally, because the ulcers can heal and scar over time, they may form strictures, or narrowings in the intestine, which require regular monitoring through imaging or endoscopy [12]. While CEAS is a chronic condition with no current established disease-modifying regimen, a correct diagnosis is an empowering turning point that ensures your treatment plan is tailored to the unique biology of your body [2][5].

In this guide

6 chapters

01

Understanding CEAS: Chronic Enteropathy Associated with SLCO2A1

Learn how CEAS (chronic enteropathy associated with SLCO2A1) causes anemia and protein loss, and how genetic testing and PGE-MUM help confirm diagnosis.

02

Recognizing Symptoms and Warning Signs of CEAS

Learn to recognize CEAS symptoms, including anemia, low protein, abdominal pain, and urgent signs of bowel obstruction, perforation, or internal bleeding.

03

The Biology of CEAS and Its Mimics

Learn how CEAS results from SLCO2A1 variants, differs from Crohn’s disease and other mimics, and how CRP and urine PGE-MUM testing can support diagnosis.

04

The Diagnostic Path: Imaging, Biopsy, and Genetics

Learn how CEAS (chronic enteropathy associated with SLCO2A1) is diagnosed using imaging, biopsy, SLCO2A1 staining, and biallelic genetic testing to confirm.

05

Treatment and Surgical Management of CEAS

Learn how chronic enteropathy associated with SLCO2A1 (CEAS) is managed with supportive care, stricture dilation, surgery, and monitoring for recurrence.

06

Monitoring and Living with CEAS Long-Term

Learn how to live with chronic enteropathy associated with SLCO2A1 (CEAS), including blood tests, strictures, capsule safety, nutrition, and long-term support.

Common questions in this guide

What is chronic enteropathy associated with SLCO2A1 (CEAS)?
CEAS is a rare inherited disorder in which mutations in the SLCO2A1 gene affect the small intestine. It causes multiple shallow ulcers, especially in the ileum, and was previously called chronic nonspecific multiple ulcers of the small intestine.
Why is CEAS different from Crohn’s disease?
CEAS is caused by a change in a single gene and is not a conventional autoimmune bowel disease like Crohn’s disease. Because the underlying biology is different, steroids and biologic medicines used for inflammatory bowel disease may provide limited or inconsistent benefit; do not stop any prescribed medicine without medical guidance.
What symptoms and blood-test changes can CEAS cause?
Slow loss of blood and protein from the ulcers can cause iron-deficiency anemia and low blood protein. These changes may lead to fatigue and swelling in the legs or feet, while tests such as hemoglobin and albumin help the care team track them.
How is CEAS usually managed?
Management focuses on long-term supportive care, including replacing lost iron and protein and monitoring nutrition and blood tests. There is no established treatment that changes the underlying disease, so the gastroenterology team should set goals based on symptoms, test results, and intestinal findings.
Can CEAS cause a narrowing of the intestine?
Yes. Ulcers may heal with scars that form strictures, or narrowed areas, in the small intestine. New cramping, increasing abdominal fullness, or other changes in abdominal symptoms should be reported so a clinician can decide whether imaging or endoscopy is needed.
How can a genetic diagnosis help someone with CEAS?
Confirming an SLCO2A1-related diagnosis can distinguish CEAS from Crohn’s disease and other causes of intestinal ulcers. It helps the care team focus on iron and protein replacement, monitoring, and individualized goals rather than assuming standard inflammatory bowel disease treatment will work.

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References

References (12)
  1. 1

    A Hereditary Enteropathy Caused by Mutations in the SLCO2A1 Gene, Encoding a Prostaglandin Transporter.

    Umeno J, Hisamatsu T, Esaki M, et al.

    PLoS genetics 2015; (11(11)):e1005581 doi:10.1371/journal.pgen.1005581.

    PMID: 26539716
  2. 2

    Chronic Enteropathy Associated with SLCO2A1 Gene.

    Umeno J, Esaki M, Uchida K, Matsumoto T

    Inflammatory intestinal diseases 2025; (10(1)):193-203 doi:10.1159/000546888.

    PMID: 40718627
  3. 3

    Roles of Organic Anion Transporting Polypeptide 2A1 (OATP2A1/SLCO2A1) in Regulating the Pathophysiological Actions of Prostaglandins.

    Nakanishi T, Tamai I

    The AAPS journal 2017; (20(1)):13 doi:10.1208/s12248-017-0163-8.

    PMID: 29204966
  4. 4

    Monoallelic mutations in SLCO2A1 cause autosomal dominant primary hypertrophic osteoarthropathy.

    Xu Y, Zhang Z, Yue H, et al.

    Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2021; (36(8)):1459-1468 doi:10.1002/jbmr.4310.

    PMID: 33852188
  5. 5

    Chronic Enteropathy Associated With SLCO2A1 Gene [CEAS]-Characterisation of an Enteric Disorder to be Considered in the Differential Diagnosis of Crohn's Disease.

    Hosoe N, Ohmiya N, Hirai F, et al.

    Journal of Crohn's & colitis 2017; (11(10)):1277-1281 doi:10.1093/ecco-jcc/jjx068.

    PMID: 28510689
  6. 6

    Chronic enteropathy associated with solute carrier organic anion transporter family member 2A1 gene: A case report and review of literature.

    Wang JY, Liu Y, Xu J, et al.

    World journal of gastrointestinal endoscopy 2025; (17(12)):112344 doi:10.4253/wjge.v17.i12.112344.

    PMID: 41479940
  7. 7

    Clinical features of chronic enteropathy associated with SLCO2A1 gene: a new entity clinically distinct from Crohn's disease.

    Umeno J, Esaki M, Hirano A, et al.

    Journal of gastroenterology 2018; (53(8)):907-915 doi:10.1007/s00535-017-1426-y.

    PMID: 29313109
  8. 8

    Clinical and Genetic Characteristics of Korean Patients Diagnosed with Chronic Enteropathy Associated with SLCO2A1 Gene: A KASID Multicenter Study.

    Hong HS, Baek J, Park JC, et al.

    Gut and liver 2022; (16(6)):942-951 doi:10.5009/gnl210415.

    PMID: 35611666
  9. 9

    Characteristics of chronic enteropathy associated with SLCO2A1 gene (CEAS) in children, a unique type of monogenic very early-onset inflammatory bowel disease.

    Lim JG, Ko JS, Ko JM, et al.

    BMC pediatrics 2024; (24(1)):396 doi:10.1186/s12887-024-04877-x.

    PMID: 38890589
  10. 10

    Successful azathioprine treatment in an adolescent with chronic enteropathy associated with SLCO2A1 gene: A case report.

    Eda K, Mizuochi T, Takaki Y, et al.

    Medicine 2018; (97(41)):e12811 doi:10.1097/MD.0000000000012811.

    PMID: 30313113
  11. 11

    Obscure gastrointestinal bleeding caused by congenital enteropathy in a Chinese young child-a case report.

    Fang Y, Gu W, Luo Y, Chen J

    BMC pediatrics 2020; (20(1)):438 doi:10.1186/s12887-020-02333-0.

    PMID: 32943023
  12. 12

    A Novel Chronic Enteropathy Associated with SLCO2A1 Gene Mutation: Enterography Findings in a Multicenter Korean Registry.

    Jeong B, Park SH, Ye BD, et al.

    Korean journal of radiology 2023; (24(4)):305-312 doi:10.3348/kjr.2022.0684.

    PMID: 36907595

This page is for informational purposes only and does not constitute medical advice. Discuss your SLCO2A1 results, anemia or protein replacement, medications, and stricture monitoring with your gastroenterologist and care team.