**4.6 Oncologic management and monitoring in the course of neoadjuvant chemotherapy**

There is a significant link between the pre-operative elasticity values and the evolution of elasticity during the treatment, and this allows us to assess its efficiency. The decrease in elasticity and heterogenicity of the tumour corresponds to a good response to the treatment. Therapeutic monitoring is thus improved.

These results have proved to be more relevant than those achieved by dynamic MR with a contrasting agent, even though MR is considered as a golden rule in the monitoring of pre-operative therapy.
