You are here

Article Text

Article menu
Download PDFPDF
Urology
Clot stones in transplant kidneys
  1. Mon Mon Oo,
  2. Silvia Proietti,
  3. Franco Gaboardi and
  4. Guido Giusti
  1. Urology, San Raffaele Hospital, Milano, Lombardia, Italy
  1. Correspondence to Dr Mon Mon Oo; urommoo{at}gmail.com

Abstract

We describe two cases of stones with unusual radiological characteristics in transplanted kidneys that originated from a blood clot as the nidus for lithogenesis. Both patients presented years after renal transplant, with gross haematuria. CT of the urinary tract showed a stone with a peripheral hyperdense shell (Hounsfield unit, HU >500) and a radiolucent centre (HU <100). Both patients underwent percutaneous nephrolithotomy successfully.

Stone analysis showed that the outer shell was calcium oxalate monohydrate and further examination of the stone in the second case confirmed an inner layer of organised clot material. Although the management of these clot stones is similar to that of other types of stones, clinicians should be aware of such a phenomenon and investigate the patients for the possibility of stone formation after haematuria, especially in allograft kidneys.

  • Hematuria
  • Urology

https://doi.org/10.1136/bcr-2023-256843

Statistics from Altmetric.com

    Request Permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

    View Full Text

    Footnotes

    • Twitter @sproietti81

    • Contributors MMO contributed to writing and formatting of the paper. SP contributed to conceptualisation of the paper and editing. FG contributed to supervision and final approval. GG contributed to conceptualisation of the paper, editing, supervision and final approval.

    • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

    • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

    • Competing interests None declared.

    • Provenance and peer review Not commissioned; externally peer reviewed.