Prediction of residual retroperitoneal mass histology after chemotherapy for metastatic nonseminomatous germ cell tumor: multivariate analysis of individual patient data from six study groups.

PURPOSE: To develop a statistical model that predicts the histology (necrosis, mature teratoma, or cancer) after chemotherapy for metastatic nonseminomatous germ cell tumor (NSGCT). PATIENTS AND METHODS: An international data set was collected comprising individual patient data from six study groups. Logistic regression analysis was used to estimate the probability of necrosis and th

The impact of chemotherapy on cognitive function: a multicentre prospective cohort study in testicular cancer

PURPOSE:The causal link between chemotherapy and cognitive impairment is unclear. We studied testicular cancer patients' objective and subjective cognitive function longitudinally, comparing a surgery group with a surgery + chemotherapy group, addressing prior methodological issues using a computerized test to limit assessment issues, and controlling for confounding variables. METHODS:Prospectively, of 145 patients from 16 centres with sufficient data, n = 61 receiving surgery + chemotherapy (etoposide and cisplatin ± bleomycin, BEP/EP; or single agent carboplatin) were compared to n = 41 receiving surgery alone. CogHealth assessed six objective cognitive tasks. The Cognitive Failures Questionnaire assessed self-perceived cognitive dysfunction. The Functional Assessment of Chronic Illness Therapy-Fatigue and the Hospital Anxiety and Depression Scale assessed psychological influences. Linear mixed models compared changes from baseline (< 6 months post-surgery/pre-chemotherapy) to follow-up (12-18 months post-baseline), controlling covariates. RESULTS:There were no significant interaction effects for five objective cognitive function tasks suggesting that changes over time were not due to group membership. However, psychomotor function (controlling for age) and physical well-being were significantly worse for the chemotherapy versus the surgery group at baseline, with groups converging by follow-up. Groups showed no differences in subjective cognitive dysfunction. The chemotherapy group showed higher anxiety, poorer functional well-being and worse fatigue compared to the surgery-only group at baseline, but not by follow-up. For both groups, emotional well-being, functional well-being and anxiety significantly improved over time. CONCLUSION:No substantive differences in objective or subjective cognitive dysfunction in either group persisted 12-18 months post-baseline. Patients undergoing chemotherapy for testicular cancer differ from findings in breast cancer populations. TRIAL REGISTRATION:ClinicalTrials.gov Identifier: ACTRN12609000545268.Hayley S. Whitford, Pawel Kalinowski, Adrian Schembri, Peter Grimison, Martin Stockler, Andrew Martin, Guy C. Toner, Ian D. Davis, Paul Maruff, Ian N. Olver for the Australian and New Zealand Urogenital and Prostate Cancer Trials Grou