Search for reliable biomarkers for predicting progression of breast cancer is essential in managing the disease. So, we are trying to provide new insights into the potential role of alpha-fucosidase (AFU) as a putative prognostic biomarker in breast cancer as compared to classic markers. The study included 56 women with breast cancer; 25 had early breast cancer, and the rest (31) had metastatic breast cancer. Thirty healthy women were considered a control group. Early breast cancer patients had a significantly increased (P ≤ 0.0001) AFU level compared with the control group. A non-significant difference in the De-ritis ratio appeared for early breast cancer compared with control. Metastatic breast cancer had a significantly (P ≤ 0.0001) increased AFU and De-ritis ratio compared with early breast cancer and the control group. A positive significant (P = 0.01) correlation exists between AFU level, age factor (r = 0.295), and the De-ritis ratio in breast cancer patients. We can conclude that it is possible to consider alpha-L-fucosidase (AFU) as a putative prognostic biomarker in breast cancer more potent than the ratio of De-Ritis. Moreover, the coincidence of elevated AFU and De-ritis levels in metastatic breast cancer gives us an idea of the stage of the disease. Keywords: alpha-L-fucosidase, early breast cancer, metastasis, the De-ritis ratio