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Updated: May 26, 2026
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Non-invasive Skeletal Muscle Quantification in Small Animals Using Micro-computed Tomography
Published on: November 8, 2024
Sequential Computed Tomography Morphometry-derived Muscle Loss Is Associated With Kidney Dysfunction and Mortality in
Dominik Kylies1,2, Julian Kylies3, Fabian Haas1,2
1III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Transplantation Direct
|May 25, 2026
Summary
Kidney transplant recipients experiencing muscle loss after surgery face higher risks of graft dysfunction and death. Opportunistic CT scans can help identify these patients for better risk management.
Area of Science:
- Nephrology
- Transplantation Medicine
- Radiology
- Geriatrics
Background:
- Kidney transplantation is the optimal treatment for end-stage kidney disease (ESKD).
- Long-term outcomes after kidney transplant are variable, necessitating improved risk stratification.
- Sarcopenia, assessed via CT morphometry, is a potential biomarker in transplant recipients.
Purpose of the Study:
- To investigate longitudinal muscle changes after kidney transplantation using CT imaging.
- To determine the association between muscle loss and kidney allograft dysfunction and survival.
Main Methods:
- Retrospective analysis of CT scans from 73 kidney transplant recipients with at least two scans.
- Quantification of skeletal muscle index, paraspinal muscle index, psoas muscle index, and visceral adipose tissue.
- Correlation of longitudinal muscle changes with major adverse kidney events and overall survival using Kaplan-Meier and Cox models.
Main Results:
- Patients with allograft dysfunction showed significantly accelerated muscle loss compared to those with stable graft function.
- Muscle decline was linked to progression to ESKD, not isolated GFR decline.
- Adverse CT morphometry was an independent predictor of reduced survival.
Conclusions:
- Post-transplant skeletal muscle loss, identified through routine CT scans, is associated with allograft dysfunction and mortality.
- Opportunistic CT-based morphometry can aid in risk stratification for kidney transplant recipients.
- Further prospective studies are needed to confirm findings and explore interventions.
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