Orthonotes
Orthonotes
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Solitary Plasmacytoma

Localized malignant proliferation of plasma cells in bone or soft tissue without systemic myeloma. Common in vertebrae, pelvis, ribs, femur. Symptoms: pain, swelling, pathological fracture, neuro deficits if spine involved. Diagnosis: biopsy + immunohistochemistry, normal marrow (

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Localized malignant proliferation of plasma cells in bone or soft tissue without systemic myeloma. Common in vertebrae, pelvis, ribs, femur. Symptoms: pain, swelling, pathological fracture, neuro deficits if spine involved. Diagnosis: biopsy + immunohistochemistry, normal marrow (<10% plasma cells), no systemic myeloma signs. Treatment: radiotherapy is mainstay; surgery for instability/fracture; lifelong follow-up for progression to multiple myeloma.
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