Previous treatment with a CDK2 inhibitor at any time.
Patients with inadequate bone marrow and/or organ functions with out-of-range laboratory values.
Clinically significant, uncontrolled heart disease and/or cardiac repolarization abnormality including MI, CABG, long QT syndrome, or risk factors for TdP.
Presence of symptomatic CNS metastases or CNS metastases that require local therapy or increasing doses of corticosteroids within 2 weeks prior to study entry.
For the combination treatment:
Patients with symptomatic visceral disease or any disease burden that makes the patient ineligible for endocrine-based therapy.
Patients who could not tolerate the prescribed dose of ribociclib during a previous course of treatment, requiring dose reduction or permanent discontinuation due to adverse events.
For patients with BC: Patient is concurrently using hormone replacement therapy.
WOCBP who are unwilling to use highly effective contraception methods, pregnant or nursing women.
Other protocol-defined inclusion/exclusion criteria may apply.
