Volvulus

n. abnormal twist in the intestine (Medicine)

A volvulus is a loop of the bowel whose nose has twisted on itself. The American Heritage Stedman's Medical Dictionary defines volvulus slightly differently as "abnormal twisting of the intestine causing obstruction," which adds obstruction in the definition, and would be more clinically significant term. It results in ischemia (loss of blood flow) and the accumulation of gas and fluid in the portion of the bowel obstructed. Ultimately, this can result in the death of tissues (necrosis, gangrene) of the blood starved tissue and requires immediate surgical intervention (jejunectomy, ileostomy, colostomy, bowel resection).
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Volvulus /vol·vu·lus/ [L.] torsion of a loop of intestine, causing obstruction. vol·vu·lus n. Abnormal twisting of the intestine causing obstruction. [more]Volvulus - Community and Resources

Noun
1. abnormal twisting of the intestines (usually in the are of the ileum or sigmoid colon) resulting in intestinal obstruction
(hypernym) pathology

n. volvulus, twist in the intestine (Medicine)