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Monoclonal B-cell lymphocytosis (MBL) is a precursor condition where someone has cells similar to those found in chronic lymphocytic leukemia (CLL), but may not necessarily develop into full CLL. The risk of MBL progressing to CLL is relatively low, with only about 1-2% of people with MBL developing CLL each year.

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Monoclonal B-cell lymphocytosis (MBL) is a precursor condition where someone has cells similar to those found in chronic lymphocytic leukemia (CLL), but may not necessarily develop into full CLL. The risk of MBL progressing to CLL is relatively low, with only about 1-2% of people with MBL developing CLL each year.

This condition requires monitoring but not necessarily immediate treatment. It's important to have regular check-ups with your healthcare team to watch for any changes or progression.

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