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Updated: Jun 5, 2025

Blood Collection from the American Horseshoe Crab, Limulus Polyphemus
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When a Horseshoe Is Not a Lucky Find.

Wesley Yim1, Sathyaseelan Subramaniam

  • 1Valley Health System Graduate Medical Education, Emergency Medicine Residency.

Pediatric Emergency Care
|December 6, 2024
PubMed
Summary
This summary is machine-generated.

A rare neonatal horseshoe kidney was identified using point-of-care ultrasound (POCUS) in an emergency setting. This case emphasizes adapting ultrasound techniques to detect congenital renal anomalies in infants.

Keywords:
horseshoekidneypoint-of-care ultrasoundrenal

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Area of Science:

  • Pediatric Radiology
  • Neonatal Imaging
  • Point-of-Care Ultrasound

Background:

  • Neonatal horseshoe kidney is an uncommon congenital anomaly.
  • Early identification is crucial for long-term patient management.
  • Emergency department evaluations require efficient diagnostic tools.

Purpose of the Study:

  • To report a case of neonatal horseshoe kidney diagnosed via point-of-care ultrasound (POCUS).
  • To highlight the utility of POCUS in identifying renal anomalies in neonates.
  • To suggest modifications in renal POCUS technique for improved anomaly detection.

Main Methods:

  • A neonate presenting with bloody diapers underwent renal point-of-care ultrasound (POCUS).
  • Ultrasound examination focused on visualizing renal anatomy, including the isthmus.
  • Standard renal ultrasound protocols were adapted based on initial findings.

Main Results:

  • Point-of-care ultrasound clearly identified a horseshoe kidney in the neonate.
  • The characteristic isthmus of the horseshoe kidney was visualized in the midline abdomen.
  • The case demonstrated the feasibility of detecting this anomaly with POCUS.

Conclusions:

  • Renal POCUS can effectively identify neonatal horseshoe kidney.
  • Consideration of midline interrogation during renal POCUS is important when lower poles are difficult to visualize.
  • Familiarity with anatomical variations is key for accurate POCUS interpretation in neonates.