**Abstract**

Breast elastography has become a key complementary technique. A modality in the framework of breast pathology, complementary of B-mode imaging and colour doppler analysis. Breast ultrasound has provided morphological grayscale images and functional flow analysis of the soft breast tissues. Elastography now brings new physio-pathological information through the assessment of tissue elasticity. There are two different modalities: Real Time Elastography (RTE) and Shear Waves (SWE) ultrafast Imaging. Both techniques require a minimum adhesion to the skill rules for acquisition and interpretation so as to limit the operator dependant dimension and diagnostic errors. Elastography thus becomes perfectly reproducible with good accuracy in the different scores of the RTE or SWE classification. The aim of elastography in cancer screening is to achieve reliable lesion characterisation and better therapy monitoring/management.

**Keywords:** Strain Real Time Elastography (RTE), Shear wave Elastography (SWE), lesion identification, Lymph node analysis, prognostic + lesion aggressiveness, oncologic management
