Schmid, Peter, Nagai, Yutaka, Agarwal, Roshan, Hancock, Barry, Savage, Philip M., Sebire, Neil J., Lindsay, Iain, Wells, Michael, Fisher, Rosemary A., Short, Delia, Newlands, Edward S., Wischnewsky, Manfred B. and Seckl, Michael J. (2009) Prognostic markers and long-term outcome of placental-site trophoblastic tumours: a retrospective observational study. Lancet, 374 (9683). pp. 48-55. ISSN 0140-6736

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Abstract

Background Placental-site trophoblastic tumours are a rare form of gestational trophoblastic disease and consequently information about optimum management or prognostic factors is restricted. We aimed to assess the long-term outcome of stage-adapted management by surgery, chemotherapy, or both for patients with the disorder.

Methods 35550 women were registered with gestational trophoblastic disease in the UK (1976-2006), of whom 62 were diagnosed with placental-site trophoblastic tumours and included, retrospectively, in the study. Patients were treated by surgery, chemotherapy, or both. We estimated the probabilities of overall survival and survival without recurrence of disease 5 and 10 years after the date of first treatment, and calculated the association of these endpoints with prognostic factors, including time since antecedent pregnancy, serum concentration of beta-human chorionic gonadotropin, and stage of disease, with both univariate and multivariate analyses.

Findings Probabilities of overall and recurrence-free survival 10 years after first treatment were 70% (95% CI 54-82) and 73% (54-85), respectively. Patients with stage I disease had a 10-year probability of overall survival of 90% (77-100) and did not benefit from postoperative chemotherapy. By contrast, patients with stage II, III, and IV disease required combined treatment with surgery and chemotherapy; probability of overall survival at 10 years was 52% (3-100) for patients with stage II disease and 49% (26-72) for stage III or IV disease. Outcome for patients who had recurrent or refractory disease was poor: only four (22%) patients achieved long-term survival beyond 60 months. Multivariate analysis showed that the only significant independent predictor of overall and recurrence-free survival was time since antecedent pregnancy. A cutoff point of 48 months since antecedent pregnancy could differentiate between patients' probability of survival (<48 months) or death (>= 48 months) with 93% specificity and 100% sensitivity, and with a positive predictive value of 100% and a negative predictive value of 98%.

Interpretation Stage-adapted management with surgery for stage I disease, and combined surgery and chemotherapy for stage II, III, and IV disease could improve the effectiveness of treatment for placental-site trophoblastic tumours. Use of 48 months since antecedent pregnancy as a prognostic indicator of survival could help select patients for risk-adapted treatment.

Item Type:	Article
Schools and Departments:	Brighton and Sussex Medical School > Clinical and Experimental Medicine
Subjects:	R Medicine > R Medicine (General) R Medicine > RC Internal medicine
Depositing User:	Grecia GarciaGarcia
Date Deposited:	16 Aug 2011 10:38
Last Modified:	03 Jul 2012 15:41
URI:	http://sro.sussex.ac.uk/id/eprint/7223
Google Scholar:	31 Citations

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