GS-9973 is a Syk inhibitor is a non-receptor cytoplasmic tyrosine kinase that inhibits the signaling in B cells, macrophages, mast cells and neutrophils. This type of inhibitor is being investigated in CLL and other types of Non-Hodgkin Lymphomas both as single agent and in combination [16]. CC-292 is a selective irreversible BTK inhibitor with potential antineoplastic activity thru inhibiting the BCR signalling. It was found to induce responses in relapsed refractory CLL patients, even those with high risk features