Open AccessThe “Omega sign”: a new radiological sign for a rare type of internal hernia involving the sigmoid mesocolon
Author(s) -
Kino Ceon Francis,
Candice Daley,
Bonnie-Paul Regis Williams,
Richard Bullock,
Ulanda Singh,
Akil Baker
Publication year - 2020
Publication title -
bjr case reports
Language(s) - English
Resource type - Journals
ISSN - 2055-7159
DOI - 10.1259/bjrcr.20190127
Subject(s) - sigmoid colon , sigmoid function , medicine , internal hernia , radiological weapon , sign (mathematics) , hernia , radiology , sigmoid volvulus , presentation (obstetrics) , bowel obstruction , surgery , artificial intelligence , computer science , mathematics , rectum , mathematical analysis , artificial neural network
The transmesosigmoid hernia is a rare type of sigmoid mesocolon hernia. Its presentation is non-specific and thus hardly ever preoperatively diagnosed. Its diagnosis often requires surgical corroboration. This case report aims to improve on the preoperative diagnosis with a proposed observed sign on CT. All literature reviewed described radiological findings related to the small bowel; thus, features of small bowel obstruction was the “hallmark” of internal hernias. This paper intends to describe the features of the sigmoid mesocolon internal hernias, illustrate and propose a never reported configuration of the sigmoid colon. This sigmoid colon configuration has a resemblance to the omega sign. We intend to present a new hallmark sign, which may serve as a clue in the identification of internal hernias involving the sigmoid mesocolon.