When a Horseshoe Is Not a Lucky Find.

Identification of a neonatal horseshoe kidney in the emergency department is uncommon but has implications for future healthcare planning for patients. We present a case of a neonate with bloody diapers who was evaluated with renal point-of-care ultrasound (POCUS) that identified a horseshoe kidney. The ultrasound was remarkable for its clear visualization of the isthmus of the horseshoe kidney in the midline abdomen. Midline interrogation is not part of the routine technique for ultrasound imaging of the kidney but should be considered when the limits of the lower pole of bilateral kidneys are difficult to visualize. This case highlights the importance of understanding normal anatomical landmarks when performing renal POCUS to identify renal anomalies.