patient came with chronic history of pain at the right renal angle. Says a few years back the pain kept changing between right and left but now has persisted on the right side only. Reports pain's severity increses with duration of sitting and sometimes prolonged standing - though it is commonly absent when standing or walking. On examination: No tenderness, no hepatomegally, kidney not enlarged. Urinalysis: No abnormality detected. Abd. U/Sound - Normal. After all these, I got confused. Please help.