Can the Hounsfield unit predict the success of medical expulsive therapy using silodosin in 4‐ to 10‐mm distal ureteral stones?

Objective We aimed to investigate the predictive ability of the Hounsfield unit (HU) on non‐contrast computed tomography (NCCT) for the success of medical expulsive therapy (MET) using silodosin in distal ureteric stones of 4‐10 mm. Methodology The data of patients who underwent MET were retrospectively screened. The patients were divided into two groups as Groups 1 and 2 depending on the presence or absence of stone expulsion, respectively. In addition to HU calculated using the NCCT images, state of the collecting systems, daily fluid intake, number of emergency department visits, and number of pain attacks were compared. Results A total of 88 patients were included in the study. Sixty‐four patients (72.7%) expelled the stone after MET while the treatment was not successful in 24 patients (27.3%). The stone area was significantly larger in Group 2 (28.4 ± 15.7 mm2 vs 46.8 ± 16.1 mm2; P