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Ultrasonographic Detection of Retrorenal Colon in Prone Position: An Alternative to Computed Tomography
Ergun Alma1, Hakan Ercil1, Adem Altunkol1
1Department of Urology, Health Sciences University, Adana City Training and Research Hospital, Adana, Turkey.
Objective:
To evaluate the correlation between ultrasonography (US) and computed tomography (CT) in prone position to detect retrorenal colon (RRC).
Materials And Methods:
In this prospective study, we included 310 patients who presented to our clinic between April 2017 and June 2019. All patients were evaluated for RRC with US and CT in prone position. Kappa compliance coefficient (κ) was used to express the compliance between CT and US outcomes.
Results:
This study included 119 (38%) female and 191 (62%) male patients with a mean age of 44.5 ± 16.1 years. With both CT and US, RRC was detected in a total of 42 (13.5%) patients. RRC was found in 9 patients (8%) on the right side, in 32 patients (18%) on the left side and in 1 patient on both sides with CT (P = .036). However, with US, it was detected in 10 patients (8%) on the right, in 31 patients on left side and in 1 patient on both sides (P = .083). The RRC detection compliance coefficients were excellent between US and CT (κ: 0.945).
Conclusion:
US used in prone position is a suitable and practical imaging alternative to CT for detection of RRC.
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