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The healthcare value of the Magee Decision Algorithm™: use of Magee Equations™ and mitosis score to safely forgo molecular testing in breast cancer.
Modern Pathology ( IF 7.5 ) Pub Date : 2020-03-17 , DOI: 10.1038/s41379-020-0521-4
Rohit Bhargava 1 , Beth Z Clark 1 , Gloria J Carter 1 , Adam M Brufsky 2 , David J Dabbs 1, 3
Affiliation  

Magee Equations™ are multivariable models that can estimate oncotype DX® Recurrence Score, and Magee Equation 3 has been shown to have chemopredictive value in the neoadjuvant setting as a standalone test. The current study tests the accuracy of Magee Decision Algorithm™ using a large in-house database. According to the algorithm, if all Magee Equation scores are <18, or 18–25 with a mitosis score of 1, then oncotype testing is not required as the actual oncotype recurrence score is expected to be ≤25 (labeled “do not send”). If all Magee Equation scores are 31 or higher, then also oncotype testing is not required as the actual score is expected to be >25 (also “do not send”). All other cases could be considered for testing (labeled “send”). Of the 2196 ER+, HER2-negative cases sent for oncotype testing, 1538 (70%) were classified as “do not send” and 658 (30%) as “send”. The classification accuracy in the “do not send” group was 95.1%. Of the 75 (4.9%) discordant cases (expected score ≤25 by decision algorithm but the actual oncotype score >25), 26 received endocrine therapy alone. None of these 26 patients experienced distant recurrence (average follow-up of 73 months). The Magee Decision Algorithm accurately identifies cases that will not benefit from oncotype testing. Such cases constitute ~70% of the routine clinical oncotype requests, an estimated saving of $300,000 per 100 test requests. The occasional discordant cases (expected ≤25, but actual oncotype score >25) appears to have an excellent outcome on endocrine therapy alone.



中文翻译:

Magee Decision Algorithm™ 的医疗保健价值:使用 Magee Equations™ 和有丝分裂评分安全地放弃乳腺癌分子检测。

Magee Equations™ 是可以估计肿瘤类型的多变量模型DX® Recurrence Score 和 Magee Equation 3 已被证明在新辅助设置中作为独立测试具有化学预测价值。当前的研究使用大型内部数据库测试 Magee Decision Algorithm™ 的准确性。根据该算法,如果所有 Magee 方程分数均 <18,或 18-25 且有丝分裂分数为 1,则不需要进行 oncotype 测试,因为实际的 oncotype 复发分数预计≤25(标记为“不发送” ). 如果所有 Magee 方程分数均为 31 或更高,则也不需要进行基因型测试,因为实际分数预计 >25(也“不发送”)。所有其他情况都可以考虑进行测试(标记为“发送”)。在送去进行肿瘤型检测的 2196 例 ER+、HER2 阴性病例中,1538 例 (70%) 被归类为“不送”,658 例 (30%) 被归类为“送”。“不发送”组的分类准确率为 95.1%。在 75 例 (4.9%) 不一致的病例中(决策算法的预期评分≤25,但实际肿瘤分型评分 >25),26 例仅接受内分泌治疗。这 26 名患者均未出现远处复发(平均随访 73 个月)。Magee 决策算法可准确识别无法从肿瘤型检测中获益的病例。此类病例约占常规临床肿瘤类型请求的 70%,估计每 100 个测试请求可节省 300,000 美元。偶尔出现不一致的病例(预期≤25,但实际肿瘤分型评分>25)似乎仅通过内分泌治疗就有很好的结果。26 人仅接受内分泌治疗。这 26 名患者均未出现远处复发(平均随访 73 个月)。Magee 决策算法可准确识别无法从肿瘤型检测中获益的病例。此类病例约占常规临床肿瘤类型请求的 70%,估计每 100 个测试请求可节省 300,000 美元。偶尔出现不一致的病例(预期≤25,但实际肿瘤分型评分>25)似乎仅通过内分泌治疗就有很好的结果。26 人仅接受内分泌治疗。这 26 名患者均未出现远处复发(平均随访 73 个月)。Magee 决策算法可准确识别无法从肿瘤型测试中获益的病例。此类病例约占常规临床肿瘤类型请求的 70%,估计每 100 个测试请求可节省 300,000 美元。偶尔出现不一致的病例(预期≤25,但实际肿瘤分型评分>25)似乎仅通过内分泌治疗就有很好的结果。

更新日期:2020-04-24
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