Once a tumor has acquired resistance to a specific chemotherapeutic agent, it is common to observe collateralresistance to other structurally similar agents.
一旦肿瘤对特定的化学治疗剂具有获得性抗性之后，通常就会观察到其对其它结构类似的试剂的间接抗性。
2
Resistance index in ipsilateral common carotid artery was significantly lower in the group with ophthalmic artery collateral than in the group without ophthalmic artery collateral.