The present invention describes the use of an agent endowed with tumour tropism in combination with another agent with anticancer activity and with an affinity for the first agent for the preparation of a medicament useful for the two-step perioperative therapy of solid tumours. The advantages of the present invention consist in the greater, effective localisation of its anticancer activity, in the reduction of the number of administration steps and in the possibility of reducing the anticancer doses, with a resulting decrease in side effects, but without any loss of efficacy.