• To determine by comparative genomic hybridation (CGH) loss of heterozygosity (LOH) patterns of the 10q23 locus (to assess PTEN status) and other sites of chromosomal alterations associated with pathologic response to mTOR inhibition. [ Time Frame: pre-treatment, day 19, and monthly blood samples ] [ Designated as safety issue: No ]
• To identify expression profiles associated with AKT activation and RAD001 treatment effect. [ Time Frame: pre-treatment, day 29, and monthly blood samples ] [ Designated as safety issue: No ]
• To identify candidate plasma markers of glycolysis that reflect tumor AKT activity. [ Time Frame: pre-treatment, day 29, and monthly blood samples ] [ Designated as safety issue: No ]

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.