Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Megacolon other imaging findings
Introduction
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Overview
Overview
Other Imaging Findings
Other Imaging Findings
Colonic Marker Studies
Colonic marker transit studies are useful to distinguish colonic inertia from functional outlet obstruction etiologies. In this test, the patient swallows a water soluble bolus of radio-opaque contrast and films are obtained 1, 3 and 5 hours later. Patients with colonic inertia show the marker spread the large intestines, while patients with outlet obstruction exhibit show accumulations of markers in some places.
Colonoscopy
A colonoscopy can also be used to rule out mechanical obstructive causes.
Anorectal manometry
Anorectal manometry may help to differentiate acquired from congenital forms.
Rectal Biopsy
Rectal biopsy is recommended to make a final diagnosis of Hirschsprung disease.
References
References
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]