Uterine artery pulsatility index: a predictor of methotrexate resistance in gestational trophoblastic neoplasia.

Uterine artery pulsatility index: a predictor of methotrexate resistance in gestational trophoblastic neoplasia.
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DOI:
10.1038/bjc.2012.65
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发表时间:
2012-03-13
影响因子:
8.8
通讯作者:
Seckl, M. J.
Seckl, M. J.
中科院分区:
医学1区
文献类型:
--
作者:
Agarwal, R.;Harding, V.;Short, D.;Fisher, R. A.;Sebire, N. J.;Harvey, R.;Patel, D.;Savage, P. M.;Lim, A. K. P.;Seckl, M. J.

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Neo-angiogenesis is a hallmark of cancer. The aim of this study was to test the hypothesis, in a prospective patient cohort, that in low-risk gestational trophoblastic neoplasia (LR-GTN) the uterine artery pulsatility index (UAPI), a measure of tumour vascularity, can predict resistance to methotrexate chemotherapy (MTX-R). 286 LR-GTN patients (Charing Cross Hospital (CXH) score 0–8, or FIGO score 0–6) were treated with methotrexate between January 2008 and June 2011 at CXH. During staging investigations, patients underwent a Doppler ultrasound to assess the UAPI. 239 patients were assessable for both UAPI and MTX-R. The median UAPI was lower (higher vascularity) in MTX-R compared with MTX-sensitive patients (0.8 vs 1.4, P<0.0001). In multivariate logistic regression, UAPI⩽1 predicted MTX-R, independent of both CXH and FIGO scores. The risk of MTX-R in patients with a FIGO score of 6 and UAPI⩽1 was 100% vs 20% in patients with UAPI>1 (χ2 P<0.0001). UAPI represents an independently validated clinically useful predictor of MTX-R in LR-GTN. Further, consideration of whether to incorporate UAPI into the FIGO scoring system is now warranted so that patients with a score of 6 and a UAPI ⩽1 might be upstaged and offered combination chemotherapy rather than MTX.
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