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Congress: ECR25
Poster Number: C-21995
Type: Poster: EPOS Radiologist (educational)
Authorblock: T. Pierre1, M. Bouquerel2, J. Gervasoni2, A. Dufresne2, C. Balleyguier1; 1Paris/FR, 2Lyon/FR
Disclosures:
Thibaut Pierre: Nothing to disclose
Marie Bouquerel: Nothing to disclose
Julie Gervasoni: Nothing to disclose
Armelle Dufresne: Nothing to disclose
Corinne Balleyguier: Nothing to disclose
Keywords: Breast, Mammography, MR, Ultrasound, Education, Cancer
Learning objectives Know the main rare breast tumors (benign or malignant) from different cases: clinical, radiological features, histopathological correlation and key points of treatment options. 
Read more Background Mammography in combination with breast ultrasonography can help suggest some histological types, but histopathological analysis remains essential for the formal diagnosis of these tumors and will therefore determine the treatment options. It is important to discuss these diagnoses of rare breast tumors in multidisciplinary tumor boards and to request histological expert reviews in cases of uncertain diagnoses. 
Read more Findings and procedure details The usual breast cancers are non-special type carcinomas and invasive lobular carcinomas or mixed subtypes and represent the majority of malignant breast tumors. The most common benign breast tumors are fibroadenoma and intraductal papilloma. We will focus on rarer breast tumors and will look in detail at some of them: angiosarcoma of the breast, usually affecting the dermis but occasionally developing in the breast parenchyma., desmoid tumor, phyllodes tumors, granular cell tumors, malignant adenomyoepithelioma, and finally hemangioma. For each of these...
Read more Conclusion It is important to know the main rare benign or malignant tumors of the breastThey often do not have any specific imaging features and it is necessary to confirm the diagnosis by histological examination (breast microbiopsy). However, it is important to know the heterogeneity of lesions (phyllodes tumors), collect multiple cores to sample the lesions, request histological expert reviews in case of uncertain diagnosis, perform molecular biology, refer to expert centers for optimal treatment. Surgery is not always the first-line treatment. The...
Read more References 1. G. A. Li et al. (2021), Breast Sarcomas, Phyllodes Tumors, and Desmoid Tumors: Epidemiology, Diagnosis, Staging, and Histology.2. G. Lissidini et al. (2022), Malignant phyllodes tumor of the breast: a systematic review.3. F. Limaiem (2023), Phyllodes Tumor of the Breast.4. Duman et al. (2016), Differentiation between Phyllodes Tumors and Fibroadenomas Based on Mammographic Sonographic and MRI Features.5. M. Tsuchiya (2023), MRI-based radiomics analysis for differentiating phyllodes tumors of the breast from fibroadenomas6. G. Spitaleri et al. (2013), Breast phyllodes...
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