Background: Flank pain is one of common urological emergency. It can be result of various causes. Most commonly results from one of three causes: urinary tract infection (UTI), kidney stones, and musculoskeletal problems like a muscle strain or pinched nerve.  

Objective: Determine frequency of none urological flank pain burden in urology outdoors. 

Methods: This was prospective descriptive case study conducted at department of urology and transplantation at Jinnah Postgraduate Medical Center Karachi from September 2020 to December 2020. All patients with flank pain, who visited in urology outdoor, were included in study. All patients had detailed history and physical examination. Urinalysis and ultrasound abdomen were done in all patients. CT KUB was also done in patients who had abnormal ultrasound finding of kidney ureter and bladder.

Results: Total 100 patients were included in this study, 41 (41%) male while 59 (59%) patients were females. 45 patients had right sided pain, 34 had left sided while remaining 21 patients had bilateral flank pain and six patients had also lower urinary tract symptoms along with pain. 13 patients had positive renal punch on examination, 23 patients had positive straight leg rising sign and rest of the 64 patients’ examination was unremarkable. 55 patients had urology related pathology on ultrasound, in 9 patients had non urological pathology and rest 36 patients it was unremarkable. CT KUB was done in all 55 patients who had positive findings on ultrasound showing pathology in kidney and ureter in which 47 patients CT scan had confirmed the diagnosis while in 8 patients it was in remarkable.

Conclusion: flank pain is not always secondary to renal origin. It has wide spectrum of alternative significant causes also.

Keywords: Flank pain, none urological, CT KUB