Inclusion Criteria:

- Written informed consent is obtained.

- The patient is at least 18 years of age at the time of informed consent.

- The patient has a histologically or cytologically confirmed diagnosis of any of the
following:

- Relapsed or refractory leukemia, including Philadelphia chromosome-positive
(Ph+), chronic myelogenous leukemia (CML), acute promyelocytic leukemia (APL),
acute myelogenous leukemia (AML), or myelodysplastic syndrome (MDS).

- Advanced solid tumors (ie, breast, lung, head/neck, colorectal, melanoma, and
sarcoma). The malignancy must be considered unresponsive to accepted available
therapies.

- The patient has an estimated life expectancy of at least 3 months.

- The patient has an Eastern Cooperative Oncology Group (ECOG) performance status of
≤2.

- Other criteria apply.

Exclusion Criteria:

- The patient has had chemotherapy, radiotherapy, radioimmunotherapy, or immunotherapy
within 28 days prior to the first dose of study drug or has not recovered from
adverse events due to any agents administered previously. For patients who received
therapy with mitomycin C, the interval is 42 days.

- The patient is receiving any other treatment for hematologic/nonhematologic
malignancy.

- The patient has had previous treatment with omacetaxine.

- The patient has been treated with any hematopoietic growth factors within 14 days of
study entry (patients on chronic erythropoiesis stimulating agents are allowed).

- The patient has New York Heart Association (NYHA) Class 3 or 4 heart disease, active
ischemia, or any uncontrolled, unstable cardiac condition for which treatment for the
condition is indicated but is not controlled despite adequate therapy, including
angina pectoris, cardiac arrhythmia, hypertension, or congestive heart failure.

- The patient has experienced a myocardial infarction within the previous 12 weeks.

- The patient has a solid tumor with symptomatic central nervous system (CNS)
metastases.

- The patient has an active, uncontrolled systemic infection considered opportunistic,
life threatening, or clinically significant at the time of treatment.

- Other criteria apply.