Prognostic impact of focal lesion location and persistence in multiple myeloma: insights from serial PET/DWI imaging.

Summary: Multiple myeloma is a type of blood and bone marrow cancer that can cause "focal lesions"—dense spots of cancer cells inside the bones. In this study, doctors used special body scans (PET and MRI) to track these cancer spots in 243 patients before and after they received stem cell transplants.

They discovered that having these spots in the arm or leg bones early on is a bad sign. More importantly, if the spots do not go away after treatment, the patient is at a much higher risk of the cancer returning, even if other blood tests show the cancer is gone. The study proves that regular bone scans are very important for tracking the disease, and we urgently need new treatments for patients whose cancer spots do not disappear.