The present invention relates generally to therapies for the treatment of diseases and disorders that are mediated by histone deacetylase (HDAC) (for example, cancer, including, for example, ovarian cancer, soft-tissue sarcoma, osteosarcoma, etc.) which employ a combination (e.g., a synergistic combination) of (a) belinostat, or a salt, hydrate, or solvate thereof, and (b) trabectedin, or a salt, hydrate, or solvate thereof.
