Image Quizzes

Diarrhea and weight loss

Reviewed by Bhupinder S. Anand, MD

PhotoStock-Israel/Image Source/Getty Images

A 65-year-old woman presents with diarrhea which began several months ago, abdominal pain, and a 10-lb weight loss. Height is 5 ft 3 in and weight is 120 lb (BMI 21.3). The patient notes that she typically does not have a sensitive stomach and is concerned by the onset of symptoms. Current medications are levothyroxine, alendronic acid, and hydrochlorothiazide. Family history is notable for pancreatic cancer on her mother's side; her daughter has celiac disease. She is of Ashkenazi Jewish descent. Body temperature is 100.2 °F and hemoglobin level is 12.9 g/dL. Colonoscopy shows ileitis with skip areas. Lab analysis is remarkable for antiglycan antibodies.

The likely diagnosis is:

Crohn disease

Ulcerative colitis

Microscopic colitis

Colorectal neoplasia

On the basis of the patient's presentation and history, this is probably a case of Crohn disease. Considering that the age of onset of Crohn disease has a bimodal distribution, this case is representative of late-onset disease. Among patients diagnosed with Crohn disease, the first peak is seen between 15 and 30 years of age, whereas the second peak, occurring in up to 15% of diagnoses, is observed mainly in women between 60 and 70 years of age. A significant proportion of Crohn disease cases are heritable. Patients of Ashkenazi Jewish descent are at higher risk of developing the condition than any other ethnic group.

According to American Gastroenterological Association guidelines, a diagnosis of inflammatory bowel disease (IBD) should be considered in older patients who present with diarrhea, rectal bleeding, urgency, abdominal pain, or weight loss. Fecal calprotectin or lactoferrin measurement may help identify patients who warrant further endoscopic evaluation. Colonoscopy is indicated for patients presenting with chronic diarrhea or hematochezia due to suspected IBD, microscopic colitis, or colorectal neoplasia.

Upon further workup for IBD, signs that suggest Crohn disease rather than ulcerative colitis (UC) are sparing of the rectum; discontinuous involvement with skip areas, deep, linear, or serpiginous ulcers of the colon; strictures; fistulas; or granulomatous inflammation. Antiglycan antibodies are more prevalent in Crohn disease than in ulcerative colitis, but they are not sensitive. Weight loss, perineal disease, fistulae, and obstruction are common in Crohn disease but uncommon in UC.

In treating Crohn disease among older adults, systemic corticosteroids are not indicated for maintenance therapy, though they may be used for induction therapy. When possible, nonsystemic corticosteroids should be used, or, if the phenotype prevents their use, early biological therapy. The decision to treat a patient with immunosuppressive drugs should be based on age, functional status, and comorbidities. Immunomodulatory treatments with lower risks for infection and cancer may be safer for patients with late-onset disease. For maintenance of remission, thiopurine monotherapy may be used, with consideration given to its risk for nonmelanoma skin cancers and lymphoma in older patients.

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

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

Image Quizzes are fictional or fictionalized clinical scenarios intended to provide evidence-based educational takeaways.

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