Performances de l'élastographie et de l'échographie mode B dans la caractérisation des masses mammaires


  • AOUDIA Lynda
  • BENDIB Salah Eddine



Elastograpy, B mode ultrasound, elasticity score, strain ratio, length ratio.


Objective: To evaluate and compare the diagnostic performance of strain elastography (SE), B-mode ultrasound (B-mode US), and the combination of the two modalities in the characterization of benign and malignant breast lesions.

Materials and methods: The prospective study included 375 breast masses, between January 2017 and January 2020. B mode ultrasound and elastography were established for each mass. The area under the curve (AUC), sensitivity, specificity, and positive predictive value (PPV) were calculated for comparison between elastography, B mode ultrasound, and the combination of the two exams. The pathological findings were used as the reference standard.

Results: Among 375 breast masses, 77 of the lesions were malignant, 298 were benign. The association of elastography with B mode ultrasound increased the AUC from 0.62 to 0.86 (95% CI: 0.78, 0.93; P < 0.0001); specificity from 23.6% (95% CI: 23%, 35.6%) to 98.03% (95% CI: 96.1%, 100%; P < 0.0001) with a decrease in sensitivity from 100% to 72.92% (CI 95%: 66.8%, 79.1%; P < 0.001); and PPV from 29.27% (CI 95%: 23%, 35.6%) to 92.11% (CI 95%: 88.4%, 95.8%; P < 0.0001).

Conclusion: The combination of elastography and B mode ultrasound increases diagnostic performance in the characterization of benign and malignant breast lesions.


Objectif : Évaluer et comparer les performances diagnostiques de l’élastographie statique (ES) et de l’échographie mode B (US mode B) et de la combinaison des deux modalités dans la caractérisation des lésions mammaires bénignes et malignes.

Matériels et méthodes : Étude prospective, incluant 375 masses mammaires, entre janvier 2017 et janvier 2020. L’échographie mode B et l’élastographie ont été établées pour chaque masse. L’aire sous la courbe, la sensibilité, la spécificité et la valeur prédictive positive (VPP) ont été calculées pour la comparaison entre l’échographie mode B et la combinaison des deux examens. L’analyse histologique a été considérée comme l’examen de référence. 

Résultats : Parmi les 375 masses mammaires, on notait 77 masses malignes et 298 masses bénignes. L’association de l’élastographie à l’échographie mode B augmente l’aire sous la courbe de 0,62 à 0.86 (IC 95% : 0.78, 0.93 ; P < 0.0001) ; spécificité de 23.6% (IC 95% : 23%, 35.6%) à 98.03% (IC 95% : 96.1%, 100% ; P < 0.0001) avec une baisse de sensibilité de 100% à 72.92% (IC 95% : 66.8%, 79.1% ; P < 0.001) ; et VPP de 29.27% (IC 95% : 23%, 35.6%) à 92.11% (IC 95% : 88.4%, 95.8% ; P < 0.0001).

Conclusion : La combinaison de l’élastographie et de l’échographie mode B augmente les performances diagnostiques dans la caractérisation des lésions mammaires bénignes et malignes.


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How to Cite

AOUDIA Lynda, KOUCHKAR Amal, & BENDIB Salah Eddine. (2022). Performances de l’élastographie et de l’échographie mode B dans la caractérisation des masses mammaires . Journal Africain D Imagerie Médicale (J Afr Imag Méd) Journal Officiel De La Société De Radiologie d’Afrique Noire Francophone (SRANF), 14(1).

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