Provided are an marker for determining sensitivity to an anticancer agent capable of distinguishing a therapeutic response of an individual patient and a novel means for a cancer therapy using the marker. In some embodiments, the adjustable last includes an inflatable member that can be filled with fluid according to the size of the article, and may be used to adjust the size of the article. The radiolucent support member has a rigidity sufficient to support an upper torso and head of a patient.