Article Text

Download PDFPDF
Malignant psoas syndrome and bilateral hydronephrosis without evident obstruction in colorectal cancer
  1. Neus Rabaneda-Lombarte1,
  2. Eugeniu Grama2,
  3. Niccolo Viveros3 and
  4. Xoel Pena-Pérez4
  1. 1Neurosciences, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
  2. 2Cardiology, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
  3. 3Rheumatology, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
  4. 4Internal Medicine, Hospital Universitari Germans Trias i Pujol, Badalona, Spain
  1. Correspondence to Dr Neus Rabaneda-Lombarte; nrabanedal.germanstrias{at}


Malignant psoas syndrome is a rare and under-recognised entity with a life expectancy of months. Its presentation is characterised by refractory back pain, which is a red flag that should raise suspicion about the condition. We present a case of a man who presented with refractory back pain and bilateral hydronephrosis without hydroureter who had no evident initial obstruction and showed stent-placement failure. Three months later, a recurrence of colorectal cancer associated with malignant psoas syndrome was diagnosed. We review the current literature on malignant psoas syndrome and hydronephrosis in relation to the presentation of cancer.

  • Colon cancer
  • Urology
  • Acute renal failure
  • Radiology
  • Pain

Statistics from

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.


  • Contributors The patient was under the care of NR-L, EG, NV and XP-P. NR-L, EG and NV drafted the manuscript. NR-L contributed to the final version of the manuscript. XP-P provided critical guidance. All authors provided input and ideas throughout the process, and critically revised and approved the final manuscript.

  • 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.