Comparison of Epidemiology, Clinical Features, and Outcomes of Patients with Reported Ewing Sarcoma and PNET over 40 Years Justifies Current WHO Classification and Treatment Approaches

Sarcoma
Kevin CampbellSteven G DuBois

Abstract

As of 2013, the WHO has classified peripheral primitive neuroectodermal tumors (PNETs) within the umbrella of Ewing sarcoma family of tumors (ESFTs) given their shared biology. Histologic features differ between PNET and Ewing sarcoma (ES), and potential clinical differences between PNET and ES have not been fully elucidated. Through the National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) database, we identified 3,575 patients identified with histologic diagnosis of ES or PNET from 1973 to 2014. We used Fisher's exact tests to compare patient and tumor characteristics between groups. Kaplan-Meier methods were used to estimate overall survival. Patients with ES were more likely to be male, ≤18 years old at diagnosis, white, and hispanic compared to patients with PNET (p=0.016 for sex; p < 0.001 for all other variables). Patients with PNET were more likely to have soft tissue primary tumors (p < 0.001), and among those with bone tumors, a lower rate of axial or pelvic tumors (p < 0.001). Patients with PNET had significantly worse 5-year survival compared to ES patients, though the absolute difference was small (51.3% versus 55.5%; p < 0.001). Survival of patients with PNET diagnosed in the 1990s or late...Continue Reading

References

Sep 1, 1990·Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology·E O BurgertP Thomas
Jan 1, 1989·Virchows Archiv. A, Pathological Anatomy and Histopathology·S DaugaardT Schiødt
Jun 22, 2011·Cancer·Mark A ApplebaumSteven G Dubois
Mar 6, 2012·Nature Genetics·Gaëlle PierronOlivier Delattre
Oct 24, 2012·Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology·Richard B WomerAaron R Weiss
Aug 11, 2015·Pediatric Blood & Cancer·Erin E KarskiSteven G DuBois

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Citations

May 8, 2021·International Journal of Cancer. Journal International Du Cancer·Logan G SpectorJoshua D Schiffman

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Software Mentioned

SEER∗Stat
SEER
STATA

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