Case Report
Differentiation between sigmoid volvulus and free air on supine abdominal radiographs: The 'liver overlap sign' versus the 'football sign'
South African Journal of Radiology | Vol 2, No 2 | a1584 |
DOI: https://doi.org/10.4102/sajr.v2i2.1584
| © 2018 W. F.C. van Gelderen
| This work is licensed under CC Attribution 4.0
Submitted: 13 August 2018 | Published: 30 June 1997
Submitted: 13 August 2018 | Published: 30 June 1997
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W. F.C. van Gelderen, Wanganui Base Hospital, New ZealandFull Text:
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Two cases are presented which emphasize the difficulty of differentiating between a sigmoid volvulus, where the 'liver overlap sign' is the only sign present, and perforation of a hollow viscus where the only sign on a supine abdominal radiograph may be the 'football sign' simulating a 'liver overlap sign'. In the case of sigmoid volvulus described in this report, the correct diagnosis established only with much difficulty and after further conventional radiographs and contrast studies.
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