The purpose of this study is to look at the genetic changes that RAD001 causes in prostate cancer cells and how those changes relate to patients' response to RAD001 treatment.

This correlative science study will be a minimum risk assessment of tumor and plasma samples collected as part of a Phase II clinical trial of RAD001 in patients with HRPC. Prior to enrollment or at the time of signing consent in the Phase II trial, patients will be approached to participate in the correlative science study. Patients who agree to participate will be assigned a separate study number which will be used to identify their molecular, genetic, genomic and biomarker assessments using the tumor and plasma samples. Clinical outcome results from the accompanying Phase II trial will be used for correlative assessments in this study, however, results from this correlative science study will be kept separate from the assessments and reporting of the clinical trial.

Inclusion Criteria:

• Patients must be enrolled in the clinical study entitled: A Single Arm, Phase II Study of RAD001 in Patients with Metastatic, Hormone-Refractory Prostate Cancer at the time of enrollment onto this study.

Adult men enrolled in the study entitled: A Single Arm, Phase II Study of RAD001 in Patients with Metastatic, Hormone-Refractory Prostate Cancer.