Pediatric renal pseudotumour.

We present a case of 6-year-old female with history of respiratory distress who went into respiratory failure requiring intubation. Patient was subsequently found to be in hypertensive crisis with hyponatremic hypochloremic metabolic acidosis and acute kidney injury. Renal ultrasound was performed to find the cause of hypertension. The ultrasound study demonstrated lobulated isoechoic to hyper echoic mass-like lesion in the middle and lower pole of the right kidney with increased vascularity on Color Doppler examination. The renal mass was finally diagnosed as a pseudotumour, representing hypertrophied portion of the spared normal renal parenchyma in otherwise atrophic right kidney. Diagnosis was made using a combination of US, MRI, DMSA and CT angiography thus avoiding unnecessary surgical intervention.