Featured are methods of treating a patient with cancer by administering, e.g., a secretory phospholipase A2 (sPLA2) hydrolysable, cisplatin-containing liposome composition (e.g., LiPlaCis). The patient may be assessed for their responsiveness to the liposomal therapy prior to treatment using the methods, devices, and kits also described herein for detecting a level of one or more biomarkers in a sample from the patient with cancer.