A Nomogram to Predict Disease-Free Survival After Surgical Resection of GIST

Danielle A. Bischof, Yuhree Kim, Ramy Behman, Paul J. Karanicolas, Fayez A. Quereshy, Dan G. Blazer, Shishir K. Maithel, T. Clark Gamblin, Todd W. Bauer, Timothy M. Pawlik

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors of the gastrointestinal tract. Adjuvant imatinib therapy has resulted in improved disease-free survival (DFS) following resection of primary GIST. The aim of our study was to create a nomogram to predict DFS following resection of GIST.

Method: Using a multi-institutional cohort of patients who underwent surgery for primary GIST at 7 academic hospitals in the USA and Canada between January 1998 and December 2012, a multivariable Cox proportional hazards model predicting DFS was created using backward stepwise selection. A nomogram to predict DFS following surgical resection of GIST was constructed with the variables selected in the multivariable model. We tested nomogram discrimination by calculating the C-statistic and compared the nomogram to four existing GIST prognostic stratification systems.

Results: A total of 365 patients who underwent surgery for primary GIST was included in the study. Using backward stepwise selection, sex, tumor size, tumor site, and mitotic rate were selected for incorporation into the nomogram. The nomogram demonstrated superior discrimination compared to the NIH criteria, modified NIH criteria, and Memorial Sloan-Kettering Nomogram and had similar discrimination to the Miettinen criteria (C-statistic 0.77 vs 0.73, 0.71, 0.71, and 0.78, respectively).

Conclusion: Four independent predictors of recurrence following surgery for primary GIST were used to create a nomogram to predict DFS. The nomogram stratified patients into prognostic groups and performed well on internal validation.

Original languageEnglish (US)
Pages (from-to)2123-2129
Number of pages7
JournalJournal of Gastrointestinal Surgery
Volume18
Issue number12
DOIs
StatePublished - Nov 18 2014

Keywords

  • GIST
  • Nomogram
  • Outcome
  • Prognosis

ASJC Scopus subject areas

  • Surgery
  • Gastroenterology
  • Medicine(all)

Fingerprint

Dive into the research topics of 'A Nomogram to Predict Disease-Free Survival After Surgical Resection of GIST'. Together they form a unique fingerprint.

Cite this