Thumbprint sign
Thumbprint Sign
The Thumbprint Sign (pronunciation: /ˈθʌmprɪnt saɪn/) is a radiological sign often seen in medical imaging, particularly in abdominal X-rays and CT scans. It is indicative of certain medical conditions, most notably Epiglottitis and Intestinal Ischemia.
Etymology
The term "Thumbprint Sign" is derived from the visual appearance of the sign on radiological images. The affected area appears similar to the impression left by a human thumbprint, hence the name.
Description
The Thumbprint Sign is characterized by the presence of localized, rounded areas of soft tissue density in the region of the Epiglottis or the Intestine. These areas appear similar to a thumbprint in shape and size, hence the term. The presence of this sign is indicative of underlying inflammation or swelling, often due to infection or ischemia.
Clinical Significance
The Thumbprint Sign is a significant diagnostic indicator in two primary conditions:
- Epiglottitis: In cases of acute epiglottitis, the Thumbprint Sign is seen on lateral neck radiographs. The swollen epiglottis appears as a thumbprint-like projection in the airway.
- Intestinal Ischemia: In cases of intestinal ischemia, the Thumbprint Sign is seen on abdominal radiographs or CT scans. The sign represents submucosal edema or hemorrhage in the wall of the intestine.
Related Terms
- Radiology: The medical specialty that uses medical imaging to diagnose and treat diseases within the body.
- Epiglottitis: A potentially life-threatening condition that occurs when the epiglottis — a small cartilage "lid" that covers your windpipe — swells, blocking the flow of air into your lungs.
- Intestinal Ischemia: A condition that occurs when the blood flow through the major arteries that supply blood to your intestines slows or stops, causing your intestinal cells to die.
External links
- Medical encyclopedia article on Thumbprint sign
- Wikipedia's article - Thumbprint sign
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