To evaluate the extent of pharmacological inhibition of Pyk2/FAK signaling in tumors regrown after surgical resection, Western blot analysis of tumors was performed for the animals that received Pyk2/FAK inhibitor PF-562271 via oral gavage or vehicle beginning 2 days before the tumor resection and, then, up to 14 days after. The gene discussed is PTK2B; the disease is neoplasm.