What specific lab values in a blood test indicate multiple myeloma in a senior patient?

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Specific blood markers, particularly elevated monoclonal proteins and impaired kidney function, are primary indicators that prompt medical evaluation for multiple myeloma in senior patients.

• Monoclonal Gammopathy: Doctors look for a distinct spike in Immunoglobulin G (IgG) or Immunoglobulin A (IgA) on serum protein electrophoresis (SPEP). A monoclonal protein level of at least 30 g/L is a common diagnostic threshold in severe cases.
• Renal Markers: Elevated Serum Creatinine and BUN indicate kidney strain. A Glomerular Filtration Rate (GFR) of 60 mL/min/1.73m² or lower suggests the kidneys are not filtering waste effectively due to myeloma interference.
• Calcium Levels: Hypercalcemia is a critical sign. Normal blood calcium ranges from 8.5 to 10.5 mg/dL; a persistent level exceeding 10.5 mg/dL can indicate bone destruction from myeloma tumors.
• Anemia and White Cell Counts: Unexplained low hemoglobin levels, often below 10 g/dL, or a reduced white blood cell count suggest bone marrow suppression, where abnormal plasma cells crowd out healthy blood cells.
• Beta-2 Microglobulin: High levels of this specific protein, often paired with LDH, are used to determine the cancer's growth rate and aggressiveness, helping to categorize the myeloma stage.

Warning Sign: If a senior patient presents with sudden, severe, unexplained bone pain paired with significant fatigue or confusion, contact a doctor or emergency services immediately, as this may indicate a pathologic fracture or acute kidney injury.

admin · 2026-10-19 09:02:15