PT - JOURNAL ARTICLE AU - NGUYEN, MINH DUNG AU - GOROBETS, OLENA AU - DJOUA, YANNICK JOEL AU - ROSE-DITE-MODESTINE, JOHAN AU - VINH-HUNG, VINCENT AU - VERSCHRAEGEN, CLAIRE AU - NGUYEN, NAM P. TI - End-of-life Androgen Deprivation Syndrome With Enzalutamide in Metastatic Prostate Cancer: A Case Report AID - 10.21873/anticanres.17625 DP - 2025 Jun 01 TA - Anticancer Research PG - 2535--2538 VI - 45 IP - 6 4099 - http://ar.iiarjournals.org/content/45/6/2535.short 4100 - http://ar.iiarjournals.org/content/45/6/2535.full SO - Anticancer Res2025 Jun 01; 45 AB - Background/Aim: Enzalutamide is a highly effective anti-androgen for the treatment of prostate cancer. Therapy can incur unbearable fatigue in elderly patients, which might require a reduced dosage. However, the value of reduced-dose treatment to improve the long-term tolerability and to decrease the risk of toxicity remains unknown.Case Report: We present the six-year clinical course of a patient treated upfront with low-dose enzalutamide (25% of the standard dose). Despite initial disease control and tolerance, the patient developed progressive frailty and signs of severe androgen deprivation near end-of-life.Conclusion: This case illustrates that while low-dose enzalutamide can provide durable disease control in elderly patients with metastatic castration-resistant prostate cancer, it does not fully prevent the late-onset toxicities associated with androgen deprivation. Personalized treatment strategies – including dose adjustment over time and consideration of intermittent therapy – may help to balance efficacy with quality of life.