Why do some patients with precursors to bone marrow cancer never develop the disease? Researchers from the Department of Forensic Medicine at Aarhus University have discovered that some cells enter a dormant state and create a defense against cancer—a breakthrough that could lead to early treatment.

In a new study published in the journal Leukemia, researchers investigated multiple myeloma, a serious bone marrow cancer that arises in plasma cells.

Before the disease emerges, patients always have a precursor condition, either MGUS (monoclonal gammopathy of undetermined significance) or SMM (smoldering multiple myeloma). These conditions are not cancer themselves but are associated with an increased risk of developing bone marrow cancer—approximately 1% and 10% increased risk per year, respectively.