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Treatment of stage I seminoma, with one course of adjuvant carboplatin or surveillance, risk-adapted recommendations implementing patient autonomy: a report from the Swedish and Norwegian Testicular Cancer Group (SWENOTECA)
St Olavs University Hospital, Norway.
Skåne University Hospital, Sweden.
University of Bergen, Norway; Haukeland Hospital, Norway.
University of Tromso, Norway; University Hospital North Norway, Norway.
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2016 (English)In: Annals of Oncology, ISSN 0923-7534, E-ISSN 1569-8041, Vol. 27, no 7, 1299-1304 p.Article in journal (Refereed) PublishedText
Abstract [en]

A total of 1118 patients with clinical stage I seminoma one course of adjuvant carboplatin or managed by surveillance were included. Stromal invasion of rete testis and tumor size amp;gt; 4 cm are confirmed as risk factors predicting relapse. Relapse rates following one course of adjuvant carboplatin is high and there is need to explore more effective adjuvant treatment options in patients with seminoma.The purpose of the protocol was to reduce the treatment burden in clinical stage I (CSI) seminoma by offering risk-adapted treatment. The protocol aimed to prospectively validate the proposed risk factors for relapse, stromal invasion of the rete testis and tumor diameter amp;gt; 4 cm, and to evaluate the efficacy of one course of adjuvant carboplatin. From 2007 to 2010, 897 patients were included in a prospective, population-based, risk-adapted treatment protocol implementing one course of adjuvant carboplatin AUC7 (amp;gt;n = 469) or surveillance (amp;gt;n = 422). In addition, results from 221 patients receiving carboplatin between 2004 and 2007 are reported. At a median follow-up of 5.6 years, 69 relapses have occurred. Stromal invasion of the rete testis [hazard ratio (HR) 1.9, amp;gt;P = 0.011] and tumor diameter amp;gt; 4 cm (HR 2.7, amp;gt;P amp;lt; 0.001) were identified as risk factors predicting relapse. In patients without risk factors, the relapse rate (RR) was 4.0% for patients managed by surveillance and 2.2% in patients receiving adjuvant carboplatin. In patients with one or two risk factors, the RR was 15.5% in patients managed by surveillance and 9.3% in patients receiving adjuvant carboplatin. We found no increased RR in patients receiving carboplatin amp;lt; 7 x AUC compared with that in patients receiving a parts per thousand yen7 x AUC. Stromal invasion in the rete testis and tumor diameter amp;gt; 4 cm are risk factors for relapse in CSI seminoma. Patients without risk factors have a low RR and adjuvant therapy is not justified in these patients. The efficacy of adjuvant carboplatin is relatively low and there is need to explore more effective adjuvant treatment options in patients with high-risk seminoma. The data do not support the concept of a steep dose response for adjuvant carboplatin.

Place, publisher, year, edition, pages
OXFORD UNIV PRESS , 2016. Vol. 27, no 7, 1299-1304 p.
Keyword [en]
testicular cancer; seminoma; surveillance; adjuvant carboplatin; risk-adapted; prognostic factors
National Category
Surgery
Identifiers
URN: urn:nbn:se:liu:diva-130658DOI: 10.1093/annonc/mdw164ISI: 000379760700016PubMedID: 27052649OAI: oai:DiVA.org:liu-130658DiVA: diva2:954241
Note

Funding Agencies|Research Committee at St Olavs Hospital, Trondheim; Swedish Cancer Society; Swedish Association of Local Authorities and Regions; Norwegian Regional Health Authorities; Norwegian Urological Cancer Group

Available from: 2016-08-22 Created: 2016-08-19 Last updated: 2016-08-22

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Wall, Najme
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Division of Clinical SciencesDepartment of OncologyFaculty of Medicine and Health Sciences
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