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Molecular genomic assessment using a blood-based mRNA signature (NETest) is cost effective and predicts neuroendocrine tumor recurrence with 94% accuracy

2021 Wolters Kluwer Health, Inc. All rights reserved. ;ISSN: 0003-4932 ;EISSN: 1528-1140 ;DOI: 10.1097/SLA.0000000000005026

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  • Title:
    Molecular genomic assessment using a blood-based mRNA signature (NETest) is cost effective and predicts neuroendocrine tumor recurrence with 94% accuracy
  • Author: Modlin, IM ; Kidd, M ; Frilling, A ; Falconi, M ; Filosso, PL ; Malczewska, A ; Kitz, A
  • Subjects: 11 Medical and Health Sciences ; Surgery
  • Description: INTRODUCTION: Identification of residual disease after neuroendocrine tumor (NET) resection is critical for management. Post-surgery imaging is insensitive, expensive and current biomarkers ineffective. We evaluated whether the NETest, a multigene liquid biopsy blood biomarker, correlated with surgical resection and could predict recurrence. METHODS: Multicenter evaluation of NET resections over 24 months (n=103): 47 pancreas, 26 small bowel, 26 lung, 2 appendix, 1 duodenum, 1 stomach. Surgery: R0 (83), R1/R2 (20). 1 ml blood collected at D0 and POD30. Transcript quantification by PCR (normal: ≤20), CgA by NeoLISA (normal≤108ng/mL). Standard-of-care (SoC) follow-up costs were calculated and compared to POD30 NETest-stratification approach. Analyses: Wilcoxon-paired test, Chi2-test. RESULTS: D0 biomarkers: NETest: 103/103 (100%)-positive while 23/103 (22%) were CgA-positive (Chi2=78, p<0.0001).In the R0 group, the NETest decreased 59±28 to 26±23 (p<0.0001); 36% (30/83) remained elevated. No significant decrease was evident for CgA. In the R1/R2 group the NETest decreased but 100% remained elevated. CgA levels did not decrease.An elevated POD30 NETest were present in R0 and 25 (83%) developed radiological recurrences. Normal score R0 s (n=53) did not develop recurrence (Chi2=56, p<0.0001). Recurrence prediction was 94% accurate with the NETest.Cost evaluation: Using the NETest to stratify postoperative imaging resulted in a cost-savings of 42%. CONCLUSION: NETest diagnosis is more accurate than CgA (100% vs. 22%). Surgery significantly decreased NETest. An elevated POD30 NETest predicted recurrence with 94% accuracy and post-surgical POD30 NETest follow-up stratification decreased costs by 42%. CgA had no surgical utility. Further studies would define the accuracy and cost-effectiveness of the NETest in the detection of post-operative recurrent disease.
  • Publisher: Lippincott, Williams & Wilkins
  • Creation Date: 2021-06
  • Language: English
  • Identifier: ISSN: 0003-4932
    EISSN: 1528-1140
    DOI: 10.1097/SLA.0000000000005026
  • Source: Spiral

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