Abstract: The present invention relates to a method of predicting assessing or monitoring the sensitivity of a subject having a cancer to an immunotherapy, and to corresponding kits. The method of predicting, assessing or monitoring the sensitivity of a subject having a tumor to an immunotherapy typically comprises a step a) of determining, in a biological sample from said subject, the presence, absence or expression level of at least one biomarker, for example at least two biomarkers, and when the expression level is determined a step b) of comparing said expression level to reference expression level(s) or to reference expression ratio(s), thereby predicting, assessing or monitoring whether the subject having a tumor is responsive or resistant to the proposed immunotherapy.