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Low Back Pain in elderly : Initial workup





Key Tests for Low Back Pain in Elderly Patients

Investigation Purpose Key Findings / Considerations
Complete Blood Count (CBC) Assess overall blood cell counts Anemia, leukopenia, thrombocytopenia (multiple myeloma, malignancies).
Serum Calcium and Phosphate Assess bone metabolism Hypercalcemia (multiple myeloma), hypocalcemia (osteomalacia).
Alkaline Phosphatase (ALP) Assess bone turnover Elevated in bone diseases like Paget's disease, osteomalacia.
Serum Protein Electrophoresis (SPEP) Detect abnormal proteins Monoclonal protein spike (multiple myeloma).
Urine Bence Jones Protein Detect light chains in urine Presence of Bence Jones proteins (multiple myeloma).
Serum Vitamin D Level Assess for vitamin D deficiency Low in osteomalacia.
Thyroid Function Tests Assess thyroid function Hyperthyroidism or hypothyroidism affecting bone density.
Erythrocyte Sedimentation Rate (ESR) Assess inflammation Elevated in inflammatory conditions, multiple myeloma.
C-Reactive Protein (CRP) Assess inflammation Elevated in inflammatory conditions, infections.
Renal Function Tests Assess kidney function Elevated creatinine and BUN (multiple myeloma affecting kidneys).
X-ray of the Lumbar Spine Assess bone structure Osteopenia, fractures (osteoporosis, osteomalacia), lytic lesions (myeloma).
Magnetic Resonance Imaging (MRI) of the Spine Detailed imaging of soft tissues and bone structures Identifies spinal stenosis, disc herniation, bone lesions (multiple myeloma).


Red Flags for Low Back Pain

Category Red Flags / Symptoms
Cauda Equina Syndrome - Sudden-onset bilateral...

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