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Relationship between divided-shaped kidney and collecting system duplication

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Abstract

Purpose

We aimed to assess the incidence of divided-shaped kidney and the relationship between divided-shaped kidney and collecting system duplication.

Subjects and methods

Between May 1 and June 30, 2012, 857 patients (men:women, 493:364; mean age 39.6 years; age range 2–98 years) with 1699 kidneys underwent enhanced computed tomography of the abdomen and pelvis at our institution. Sixty kidneys were excluded (tumor, 3; percutaneous nephrostomy, 9; polycystic kidney disease, 4; renal injury, 1; infarct, 1; hydronephrosis, 18; parapelvic cyst, 17; artifact, 5; horseshoe kidney, 2). Finally, 845 patients and 1639 kidneys were included. The number of cases of prominent column of Bertin (divided by grade of prominence as either divided-shaped kidney or hypertrophy) and collecting system duplication (bifid, partial, and complete) were evaluated. Fisher exact test was used to determine the relationship between divided-shaped kidney and collecting system duplication, and between hypertrophy and collecting system duplication.

Results

Of 1639 kidneys, 66 (4%) were divided-shaped kidneys, and 88 (5%) had collecting system duplication (bifid, 69; partial, 19; complete, 0); among the 66 divided-shaped kidneys, 28 (42%) had collecting system duplication. Among the 429 cases of hypertrophy and 1144 normal kidneys, 51 (11.9%) and 9 (0.8%) had collecting system duplication, respectively.

Conclusions

The incidence of divided-shaped kidney was 4%, and there was a significant association between divided-shaped kidney and collecting system duplication.

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Acknowledgments

This work was supported by the research Grant of Chungbuk National University in 2013.

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Authors and Affiliations

  1. Department of Radiology, Chungbuk National University Hospital, 776, 1 Sunhwan-ro, Seowon-gu, Cheongju-si, Chungcheongbuk-do, 362-711, Korea

    Ji Hyung Lee, Bum Sang Cho, Yook Kim, Jisun Lee, Min Ho Kang, Sung Jin Kim & Kil Sun Park

  2. Department of Radiology, College of Medicine, Chungbuk National University, 52, Naesudong-ro, Seowon-gu, Cheongju-si, Chungcheongbuk-do, 362-763, Korea

    Bum Sang Cho, Sung Jin Kim & Kil Sun Park

Authors
  1. Ji Hyung Lee
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  2. Bum Sang Cho
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  3. Yook Kim
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  4. Jisun Lee
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  5. Min Ho Kang
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  6. Sung Jin Kim
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  7. Kil Sun Park
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Correspondence to Bum Sang Cho.

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Lee, J.H., Cho, B.S., Kim, Y. et al. Relationship between divided-shaped kidney and collecting system duplication. Abdom Imaging 40, 2441–2445 (2015). https://doi.org/10.1007/s00261-015-0416-x

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  • DOI: https://doi.org/10.1007/s00261-015-0416-x

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