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Chapter: Paediatrics: Nephrology

Paediatrics: Abdominal/renal mass

A rare presentation of urinary tract problems, which needs to be differen-tiated from other causes of abdominal mass and swelling.

Abdominal/renal mass

 

A rare presentation of urinary tract problems, which needs to be differen-tiated from other causes of abdominal mass and swelling.

 

Causes

 

Intrarenal

 

• Wilms’ tumour (young child with rapidly growing mass).

 

• Renal venous thrombosis (newborn with haematuria).

 

• Benign nephroma (rare neonatal problem).

 

• Horseshoe kidney.

 

• Pyelonephritis (renal abscess).

 

Other renal

 

Hydronephrosis associated with the following.

• Pelviureteric junction (PUJ) obstruction.

• Vescioureteric junction (VUJ) obstruction.

• Large bladder and bladder outlet obstruction: e.g.

o posterior urethral valves (PUV);

o prune belly syndrome;

o neurogenic bladder.

• Urinoma: i.e. an encapsulated extrapelvicalyceal collection of urine that forms from urine leakage through a tear in the collecting system or the proximal ureter.

• Single cyst (benign renal cyst).

• Multicystic dysplastic kidney—usually newborn.

• Polycystic disease:

o autosomal recessive;

o autosomal dominant—rare in children.

• Haematoma (trauma).

 

Extrarenal

Adrenal mass (e.g. neuroblastoma).

 

Investigation

 

• US will distinguish between most of the above.

• Further investigation, depending on likely causes and discussion with radiology and urology colleagues, e.g. CT, MRI.

 

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Paediatrics: Nephrology : Paediatrics: Abdominal/renal mass |


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