Does over-sized renal pelvis cause hydronephrosis?

Q: I am a 44 years old female suffering from pain in flank, accompanied by nausea for the last 18 months. Can my over-sized renal pelvis lead to hydronephrosis?

A:Hydronephrosis merely reflects the dilation (swelling) of the urinary tract (renal pelvis). Its presence is not limited by any minimal cut-off size of dilation.