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Living with Sclerosing mesenteritis

An inflammatory condition of the membrane that anchors the small intestine, which can cause belly pain, nausea, and weight loss.

Understanding Sclerosing mesenteritis

Sclerosing mesenteritis is one of several names for inflammatory disorders of the mesentery, the membrane that anchors the small intestine to the back of the belly wall.

It mostly affects men in their 40s to 60s, but women and children can also be affected. Symptoms can include belly pain, nausea and vomiting, constipation or diarrhea, weight loss, and fever. Some people have a belly mass.

Signs & symptoms

GARD lists these symptoms in its summary:

  • Belly pain
  • Nausea and vomiting
  • Constipation or diarrhea
  • Weight loss
  • Fever
  • A mass in the belly

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include autoimmune and inflammatory disease specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What tests confirmed this diagnosis?
What treatments are options?
Which specialists should follow this condition?

Quick facts

Symptoms usually startAdult

GARD says the cause is poorly understood. Suggested causes include earlier belly surgery or injury, autoimmunity, and infection.

Also known as: idiopathic sclerosing mesenteritis; igg4-related mesenteritis; isolated mesenteric lipodystrophy; lipomatous mesenteritis; liposclerotic mesenteritis; mesenteric fibromatosis

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Sclerosing mesenteritisGARD ID 8169 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Sclerosing mesenteritis.

Explore the Sclerosing mesenteritis blog

Explore research for Sclerosing mesenteritis

Explore actively recruiting Sclerosing mesenteritis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Sclerosing mesenteritis with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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