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Updated: Jun 15, 2026

Competing-Risk Nomogram for Predicting Cancer-Specific Survival in Multiple Primary Colorectal Cancer Patients after Surgery
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Histology-specific nomogram for primary retroperitoneal soft tissue sarcoma.

Ilaria Ardoino1, Rosalba Miceli, Mattia Berselli

  • 1Unit of Medical Statistics, Biometry and Bioinformatics, National Cancer Institute, Milan, Italy.

Cancer
|March 9, 2010
PubMed
Summary

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A new histology-specific nomogram helps predict 5- and 10-year survival for patients with retroperitoneal soft tissue sarcoma (STS). This tool aids in personalized risk assessment and treatment decisions for retroperitoneal STS patients.

Area of Science:

  • Oncology
  • Surgical Oncology
  • Sarcoma Research

Background:

  • Retroperitoneal soft tissue sarcoma (STS) presents unique challenges in predicting patient outcomes.
  • Accurate prognostication is crucial for effective management and treatment planning in STS.
  • Existing nomograms may not adequately address the specific nuances of retroperitoneal STS.

Purpose of the Study:

  • To develop a histology-specific nomogram for predicting overall survival (OS) at 5 and 10 years.
  • To provide a tool for individualized risk assessment in primary retroperitoneal STS.
  • To improve decision-making for patients diagnosed with retroperitoneal STS.

Main Methods:

  • Utilized data from a prospective sarcoma database at a single institution.
  • Included patients with primary localized retroperitoneal STS resected with curative intent (1985-2007).

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  • Employed a parametric piecewise exponential survival multivariate model for nomogram development and internal validation, considering prognostic variables like tumor burden, grade, and surgical margins.

    • Main Results:

    • Analyzed 192 patients; 114 were alive at 10 years post-surgery (median follow-up: 55 months).
    • Tumor size demonstrated a significant impact on relative hazard, increasing up to approximately 25 cm and then decreasing.
    • Histologic subtype was the only investigated factor that did not reach statistical significance at the 10% level.

    Conclusions:

    • A validated histology-specific nomogram for retroperitoneal STS is now available.
    • This nomogram facilitates improved risk stratification and personalized treatment decisions for retroperitoneal STS.
    • External validation is recommended to further confirm the nomogram's generalizability.