Inclusion Criteria:

- Patients with confirmed metastatic RCC

- Patients must have documented progression on treatment with sunitinib or sorafenib.
Prior therapy with bevacizumab and/or cytokines (i.e., IL-2, interferon) is
permitted. Prior vaccine therapy in the adjuvant setting is also permitted.
Patients can have failed therapy with ONE prior mTOR inhibitor.

- Patients must have at least one measurable lesion on computer tomography (CT) Scan or
magnetic resonance imaging (MRI) using Modified RECIST criteria.

- Patients must have normal organ and marrow function, unless in the opinion of the
treating investigator, the abnormality is related to tumor, and the study chairman
agree the abnormality is unlikely to affect the safety of perifosine use. Normal
organ and marrow function is described below:

- ANC >= 1.5 x 109/L

- Platelets >= 75,000/ mm3

- HCT >= 28% (with or without growth factor support)

- Creatinine <= 3.0 mg/dl

- Total bilirubin <= 1.5 x upper limit of normal

- Transaminase <= 2.5 x upper limit of normal

- ECOG performance status of 0 or 1

- Patients with CNS metastases must be clinically stable for at least 2 months
following treatment with radiation therapy, surgery, or both; and be off
corticosteroids and anti-seizure medication.

- Patients with a life expectancy ≥6 months

- Age ≥18 years old

- Patients who give a written informed consent obtained according to local guidelines

- Women of childbearing potential must have had a negative serum or urine pregnancy
test 72 hours prior to the administration of the first study treatment.

Exclusion Criteria:

- Patients who have not recovered (<= grade 1) from adverse events from prior therapy
(excluding alopecia).

- Patients currently receiving sorafenib or sunitinib who have received either of these
within 2 weeks prior to study entry.

- Patients may have had prior sorafenib OR sunitinib BUT cannot have been treated with
both VEGF receptor inhibitors.

- Patients with a known hypersensitivity to perifosine or its excipients.

- Female patients who are pregnant or breast feeding, or adults of reproductive
potential who are not using effective birth control methods.

- Patients who are using other investigational agents or who had received
investigational drugs <= 4 weeks prior to study entry.

- Patients unwilling to or unable to comply with the protocol.

- Patients who have a history of another primary malignancy <= 5 years with the
exceptions of non melanomatous skin cancer and carcinoma in situ of the cervix.