Abstract
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 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 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.
Publication Date
3-28-2019
First Page
e557
Last Page
559
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Elawdy, Mohamed M.; El-Halwagy, Samer; Razek, Yasser A.; Alsenani, Abeer R.; and Almazroui, Sultan
(2019)
"A Case of Pure Matrix Ureteral Stone: A rare type of urinary calculi that may be overlooked,"
Sultan Qaboos University Medical Journal: Vol. 18: e557-559.
DOI: https://doi.org/10.18295/squmj.2018.18.04.024
