Longitudinal Data Registry of Plasma Cell Dyscrasia

This registry study is collecting long-term data from patients with plasma cell disorders — conditions affecting plasma cells in the bone marrow, including multiple myeloma, MGUS, POEMS syndrome, and AL amyloidosis — to better understand how these diseases progress and respond to treatment over time. **You may be eligible if...** - You have been diagnosed with a plasma cell disorder (such as multiple myeloma, MGUS, POEMS syndrome, or AL amyloidosis) at Zhongshan Hospital between 2007 and 2027 - Your diagnosis, treatment, and follow-up records are complete - You consent to participate **You may NOT be eligible if...** - You are pregnant, breastfeeding, or of childbearing age but refuse to use reliable contraception - You have a severe psychiatric illness - The investigator determines participation is not appropriate for you Talk to your doctor to see if this trial is right for you.