A Case of Pure Matrix Ureteral Stone: A rare type of urinary calculi that may be overlooked

A Case of Pure Matrix Ureteral Stone: A rare type of urinary calculi that may be overlooked

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Matrix stones are a rare form of urinary calculi with a low mineral content.We report a 63-year-old female patient who presented to the Sohar Hospital, Sohar, Oman, in 2018 with unexplained left flank pain and constipation.She had a history of chronic renal failure (CRF) and had previously Variants in genes encoding small GTPases and association with epithelial ovarian cancer susceptibility. undergone haemodialysis (HD).

Non-contrast computed tomography (CT) did not show any renal or urinary stones.However, a left-sided ureteroscopy revealed a yellow-coloured stone that was soft in consistency occupying the proximal 5 cm section of the ureter.Many attempts at forceps extraction were required for complete clearance.

A global quantitative composition analysis revealed the extracted stone to be composed entirely of protein-matrix material.Matrix stones require a high index Nutritional knowledge, attitudes and behaviours in rugby league; influences of age, body composition and ancestry of suspicion as they are sometimes radiolucent and cannot be visualised on CT scans.Risk factors include being female and a history of urinary tract infections, CRF and HD.

Keywords: Urolithiasis; Ureteral Calculi; Diagnostic Imaging; Ureteroscopy; Case Report; Oman.