Crossed renal ectopia with colic. A clinical clue to embryogenesis

Area of Science:

• Urology
• Developmental Biology
• Medical Genetics

Background:

• Crossed renal ectopia is a rare congenital anomaly where one or both kidneys are located on the contralateral side of the abdomen.
• The exact etiology remains debated, with theories focusing on either renal or ureteral developmental pathways.

Observation:

• Presents a clinicopathologic correlation of two patients with crossed renal ectopia experiencing ureteric colic.
• Reviews four additional cases from existing medical literature.

Findings:

• The clinicopathologic correlation supports the theory that ureteral, rather than renal, migration is the primary developmental aberration causing crossed renal ectopia.
• This reaffirms the understanding of the embryological basis for this condition.

Implications:

• Understanding the ureteral migration theory aids in diagnosing and managing patients with crossed renal ectopia and associated symptoms like ureteric colic.
• Provides a basis for further research into the genetic and molecular mechanisms underlying ureteral development.