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Comparison of Tc-99m DMSA Renal Planar Scan and SPECT for Detection of Cortical Defects in Infants with Suspected Acute Pyelonephritis

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Abstract

Objective

To compare the detection rate of Tc-99m dimercaptosuccinic acid (DMSA) renal single photon emission computerized tomography (SPECT) with that of planar scan for renal cortical defects in infants under one year of age with suspected acute pyelonephritis.

Methods

Sixty infants under one year of age who exhibited fever and pyuria were prospectively included in this study. All infants underwent concurrent Tc-99m DMSA renal planar scan and SPECT. Detection rates for cortical defects and the numbers of cortical defects in both kidneys were compared between Tc-99m DMSA planar scan and SPECT. The cortical defects were classified as large and small; the rate of discordant results was compared between subgroups.

Results

Negative findings by planar scan in 11 infants (11.3%) were modified to positive findings by SPECT. The detection rate of SPECT was significantly higher than that of planar scan (53.3% vs. 35.0%, p < 0.001). The numbers of cortical defects on SPECT were significantly higher than those on planar scan (0.85 ± 0.97 vs. 0.53 ± 0.83, p < 0.001). A significantly higher rate of discordant results between the planar scan and SPECT was observed for the small cortical defects compared to the large cortical defects (48.6% vs. 14.3%, p = 0.029).

Conclusions

Tc-99m DMSA renal SPECT showed a higher detection rate, compared with planar scan, for renal cortical defects in infants with suspected acute pyelonephritis. The study results suggest that, compared with planar scan, Tc-99m DMSA SPECT can detect small cortical defects with greater sensitivity.

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Author information

Author notes

  1. Ga Eun Kim and Jae Hyun Park have equal contribution to this study, so they both are co-first authors.

Authors and Affiliations

  1. Department of Pediatrics, Keimyung University School of Medicine, Daegu, Republic of Korea

    Ga Eun Kim, Jae Hyun Park & Joon Sik Kim

  2. Department of Nuclear Medicine, Keimyung University School of Medicine, Daegu, Republic of Korea

    Kyoung Sook Won & Hae Won Kim

Authors
  1. Ga Eun Kim
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  2. Jae Hyun Park
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  3. Joon Sik Kim
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  5. Hae Won Kim
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Contributions

JHP and HWK conceptualized the study. JHP and JSK collected the data. GEK managed the cases. GEK and KSW performed the statistical analysis. HWK drafted the manuscript. All authors approved the final manuscript. HWK will act as guarantor for this paper.

Corresponding author

Correspondence to Hae Won Kim.

Ethics declarations

The institutional review board of Dongsan Medical Center approved this study.

Ethical Approval

All procedures involving human participants were conducted in accordance with the ethical standards of the institutional research committee and with the 1964 Declaration of Helsinki.

Conflict of Interest

None.

Source of Funding

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (no. 2014R1A5A2010008 and no. 2017R1C1B5017721).

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Kim, G.E., Park, J.H., Kim, J.S. et al. Comparison of Tc-99m DMSA Renal Planar Scan and SPECT for Detection of Cortical Defects in Infants with Suspected Acute Pyelonephritis. Indian J Pediatr 86, 797–802 (2019). https://doi.org/10.1007/s12098-019-02969-6

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  • DOI: https://doi.org/10.1007/s12098-019-02969-6

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