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Woman presents with weight loss and nausea

Reviewed by Bhupinder S. Anand, MD

David M. Martin, MD/Science Source

A 42-year-old woman presents with pain in her right abdomen, nausea, and diarrhea. She reports a weight loss of about 12 lb in the past several weeks because of a disinterest in food, which typically exacerbates her symptoms. She explains that she has been experiencing mounting stress at work and abdominal cramping and fatigue. Her family medical history is significant for pancreatic cancer and multiple sclerosis. She has not experienced any significant medical events in the past few years. Endoscopy shows polypoid appearance of the colonic lining.

What is the likely diagnosis?

Colon cancer

Ulcerative colitis

Crohn disease

Diverticulitis

Behçet disease

It is likely that the polypoid appearance of the colonic lining is a result of chronic inflammation of longstanding Crohn disease with an ileocolonic manifestation. Crohn disease is an idiopathic, chronic inflammatory bowel disease characterized by cycles of relapse and remission. These asymptomatic periods can last for several months up to a few years, as reported by the patient in this case. Up to 50% of cases of Crohn disease are characterized by ileocolitis, or inflammation of the ileum and the colon. Although postinflammatory polyps are a cancer risk factor for inflammatory bowel disease and pseudopolyps are associated with severe disease, their appearance is not necessarily a poor prognostic factor.

When assessing ongoing disease activity in ileocolonic Crohn disease or ulcerative colitis, colonoscopy represents the first-line approach. Endoscopic visualization and biopsy are critical components of the diagnosis. Alternatively, cross-sectional imaging can be used to assess disease phenotype. In addition, plain radiography or a CT scan of the abdomen can identify bowel obstruction and scanning of the pelvis can detect any intra-abdominal abscesses. Ulcerative colitis looms large in the differential diagnosis. Although weight loss, perineal disease, fistulae, and obstruction are common in Crohn disease, they are uncommon or rare in ulcerative colitis, although bleeding is observed much more frequently in ulcerative colitis.

Treatment of Crohn disease is based on the severity, location, and subtype (inflammatory, stricturing, or penetrating). There is also now a focus on determining which patients are at risk for a more severe disease course and may require earlier and more aggressive therapies. Crohn disease is primarily managed through the introduction of early immunosuppressive or combination therapy with biologic agents in high-risk patients, as well as complementary diet modification. Although most patients will ultimately undergo surgery, there is no curative approach, unlike in ulcerative colitis.

In its clinical care pathway, the American Gastroenterological Association supports a top-down approach to therapy for adult patients with moderate to severe luminal Crohn disease (defining moderate to severe disease as having a Crohn Disease Activity Index score of 220 or higher, or having a high risk of complications). This approach supports the early use of biologic agents, with or without immunomodulators, over a stepwise strategy. The patient’s response to this new regimen should be determined in the 12-week period after the initiation of therapy. Endoscopy or transmural responses to therapy should be assessed after 6 months.

Bhupinder S. Anand, MD, Professor, Department of Medicine, Baylor College of Medicine, Houston, TX

Bhupinder S. Anand, MD, has disclosed no relevant financial relationships.

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