Endourological Options for Small (< 2 cm) Lower Pole Stones — Does the Lower Pole Angle Matter?

Author:

Luk Angus,Geraghty RobertORCID,Somani Bhaskar

Abstract

Abstract Purpose of Review Small renal stones in the lower pole are often difficult to treat. The angle of the lower pole to the renal pelvis (lower pole angle) is a limiting factor to rendering the patient stone free. This review explores the definitions of the lower pole angle, the various treatment options available, and how outcomes are influenced by the angle. Recent Findings It is clear the lower pole angle definition varies widely depending on described technique and imaging modality. However, it is clear that outcomes are worse with a steeper angle, especially for shock wave lithotripsy and retrograde intrarenal surgery (RIRS). Percutaneous nephrolithotomy has similar reported outcomes to RIRS, and there is limited evidence it may be superior for steeper angles over RIRS. Summary Lower pole stones can be technically challenging and adequate assessment prior to choosing operative approach is key.

Publisher

Springer Science and Business Media LLC

Subject

Urology,General Medicine

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