An Ectopic Pelvic Kidney.

Area of Science:

• Nephrology
• Urology
• Developmental Biology

Background:

• A pelvic kidney is a congenital anomaly where the kidney fails to ascend to its normal position during fetal development.
• This condition is often asymptomatic and discovered incidentally during imaging for other reasons or during neonatal screening.
• While generally benign, pelvic kidneys can be associated with complications such as urinary tract infections, hydronephrosis, and calculus formation.

Observation:

• A 28-year-old male presented with recurrent lower left abdominal pain and a recent episode of hematuria.
• The patient reported passing two small calculi (approximately 5 mm each) after the hematuria, which led to decreased pain intensity.
• No history of fever was noted, and the patient had a known pelvic kidney.

Findings:

• The case highlights that while an ectopic kidney (pelvic kidney) is often asymptomatic, its association with renal pelvis malrotation and calculus formation increases the risk of presenting symptoms.
• The combination of pelvic kidney, malrotation, and calculus can lead to significant clinical manifestations, including hematuria and colicky pain.
• This presentation underscores the importance of recognizing potential complications associated with renal ectopia.

Implications:

• Clinicians should maintain awareness of potential complications in patients with ectopic kidneys, particularly the association with calculus and malrotation.
• Routine follow-up ultrasounds are recommended for asymptomatic individuals with pelvic kidneys to monitor for complications like hydronephrosis or calculus.
• With appropriate diagnostic evaluation and timely intervention, ectopic kidneys generally do not pose serious long-term health risks.