Radiolucent Matrix Stones in a Transplanted Kidney: A Case Report

Matrix stones are a rare form of kidney stones, which are composed of mucoproteinaceous material. They are often difficult to diagnose as they are characteristically radiolucent on CT urinary tract. This difficulty is compounded in transplanted kidneys as obstructing stones commonly present without...

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Published inCurēus (Palo Alto, CA) Vol. 15; no. 4; p. e38280
Main Authors Adhoni, Mohammed Zain Ulabedin, Nagle, Amy, Ali, Zubeir
Format Journal Article
LanguageEnglish
Published United States Cureus Inc 29.04.2023
Cureus
Subjects
Calcification
Case reports
Creatinine
Defects
Hemodialysis
Kidney stones
Kidney transplants
Kidneys
Metabolism
Proteins
Radiology
Risk factors
Transplantation
Transplants & implants
Urinary tract diseases
Urinary tract infections
Urine
Urogenital system
Urology
renal stone disease
endo urology
radiolucent kidney stone
colloid calculi
kidney transplant recipient
renal stone surgery
matrix stone
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Summary:Matrix stones are a rare form of kidney stones, which are composed of mucoproteinaceous material. They are often difficult to diagnose as they are characteristically radiolucent on CT urinary tract. This difficulty is compounded in transplanted kidneys as obstructing stones commonly present without pain and can cause acute kidney injury. Here, we present a case of a 61-year-old female with a live-donor kidney transplant, who was found to develop deranged renal function on routine follow-up investigations. Therefore, a CT urogram was performed and it showed filling defects in the renal pelvis and upper ureter of the transplanted kidney. Therefore, diagnostic ureterorenoscopy was performed and three stones of about 7-8 mm each were found in the renal pelvis, they were treated by Holmium:Yttrium aluminium garnet (YAG) laser fragmentation. This case report describes the challenges in the management of this rare stone in a transplanted kidney.
ISSN:2168-8184
2168-8184
DOI:10.7759/cureus.38280