Provided herein are methods of treating cancer using a phosphoinositide-3-kinase (PI3K) inhibitor. In certain embodiments, the cancer is follicular lymphoma (FL). In certain embodiments, the PI3K inhibitor is administered on a continuous dosing schedule (CS). In other embodiments, the PI3K inhibitor is administered on an intermittent dosing schedule (IS).本文提供使用磷酸肌醇-3-激酶(PI3K)抑制劑治療癌症之方法。在某些實施例中,該癌症為濾泡淋巴瘤(FL)。在某些實施例中,該PI3K抑制劑係以連續給藥時程(CS)投與。在其他實施例中,該PI3K抑制劑係以間歇給藥時程(IS)投與。