Webster's New World Medical Dictionary

101
Crohn’s disease
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possibly narrowing of the bowel, sometimes leading
to obstruction. Deep ulcers can puncture holes in
the bowel wall, leading to infection in the abdomi-
nal cavity (peritonitis) and in adjacent organs.
Abdominal pain, diarrhea, vomiting, fever, and
weight loss can be symptoms. Diagnosis is com-
monly made by X-ray or colonoscopy. Treatments
include medications that reduce inflammation, sup-
press the immuine system, and antibiotics. Dietary
changes can reduce symptoms. When severe, sur-
gery can be necessary. Also known as regional
enteritis. See also 
Crohn’s enteritis; Crohn’s ente-
rocolitis; Crohn’s ileitis; Crohn’s ileocolitis.
Crohn’s enteritis
Crohn’s disease involving only
the small intestine. See also 
Crohn’s disease.
Crohn’s enterocolitis
Crohn’s disease involving
both the small and large intestines. See also 
Crohn’s
disease.
Crohn’s ileitis
Inflammation of the ileum (the
lowest part of the small intestine) due to Crohn’s
disease. See also 
Crohn’s disease.
Crohn’s ileocolitis
Crohn’s disease involving the
ileum (the lowest portion of the small intestine) and
the colon (the large intestine). See also 
Crohn’s
disease.
cross-section
In anatomy, a transverse cut
through a structure or tissue. The opposite is longi-
tudinal section.
cross-sectional study
A research study done at
one time, not over the course of time. A cross-sec-
tional study might be a study of a disease such as
AIDS at one point in time, to learn its prevalence
and distribution within the population. Also known
as a synchronic study.