Introduction

• Absence of one or both kidneys.
• Cause: failure of mesonephric duct which in turn fails to stimulate nephron differentiation from metanephros.
• Signs: normal kidney often hypertrophied .
• Possible increased risk of neoplastic development in normal kidney.
• Often other genital anomalies.
• Treatment: none possible.
• Diagnosis: radiography, laboratory tests, histopathology.
• Prognosis: poor.