Percutaneous Nephrolithotomy under Ultrasound Guidance in Patients with Renal Calculi and Autosomal Dominant Polycystic Kidney Disease: A Report of 11 Cases

Table 3

Stone characteristics and puncture locations.

Characteristics	Renal units
Units
Side
Right	6
Left	7
Stone location
Renal pelvis	4
Caliceal	2
Multiple sites	7
Stone multiplicity
Single	2
Multiple	9
Partial staghorn	2
Stone opacity
Opaque	11
Lucent	2
Nature of stones
Primary	13
Recurrent	0
Cutaneous tract access
Subcostal	9
Supracostal	1
Both	2
Failed	0