• Amina Belhadj, Samia Bekkal Brikci, Chahinez Akhrouf, Adel Belhadj, Miloud Medjamia, and Tewfik Sahraoui.
• Biology of Development and Differentiation Laboratory, Oran 1 University, Ahmed Ben Bella, Department of Biology, Faculty of Nature and Life sciences.
• Afr Health Sci. 2023 Dec 1; 23 (4): 266274266-274.

BackgroundBreast phyllodes tumors (BPT) have variable malignant potential, their histological classification remains insufficient for an accurate diagnosis.ObjectivesWe attempted to investigate CD10 (Cluster of differentiation 10) and EGFR (Epidermal growth factor receptor) expression in BPT in order to highlight their diagnostic and prognostic values.MethodsEight patients with BPT are recruited from January 2014 to December 2020 and immunohistochemical assessment of CD10 and EGFR is realized.ResultsMedian age was 27±15.2, the mean tumor size was 9.63±10.21. Only malignant tumours showed expression for EGFR. Borderline and malignant tumors were CD10 positive. Patients overexpressing CD10 were postmenopausal with great tumor size, 25% of these were sarcomatous. Coexistence of CD10 and EGFR overexpression was found in 25% of cases and was associated with age (P=0.008), tumor size (P=0.030) and hitologic types (P=0.014). PC1 and PC2, were extracted, they accounted cumulatively for 94.7% of the variance of the data analysed, it suggests that patient's age and histological type of tumor have significant association with CD10 and EGFR expression in BPT.ConclusionsEGFR and CD10 overexpressed combined proteins in phyllode tumors constitute, with histopathological parameters, an important prognostic factor as well as a promising potential targets.© 2023 Belhadj A et al.

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