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Related Experiment Videos

[Nonproducing myeloma without evident bone lesion].

T Kawatani1, N Maeda, A Hosoda

  • 12nd Department of Internal Medicine, Tottori University School of Medicine.

[Rinsho Ketsueki] the Japanese Journal of Clinical Hematology
|June 1, 1990
PubMed
Summary

This study reports a rare case of non-secretory multiple myeloma, a type of plasma cell disorder, in a 76-year-old female presenting with anemia. The patient successfully responded to chemotherapy, highlighting the importance of considering this rare diagnosis.

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Area of Science:

  • Hematology
  • Oncology
  • Pathology

Background:

  • Multiple myeloma is a plasma cell malignancy characterized by the overproduction of a monoclonal immunoglobulin.
  • Non-secretory multiple myeloma is a rare subtype where no monoclonal protein is detectable in serum or urine.

Observation:

  • A 76-year-old female presented with anemia and abnormal bone marrow findings (40.8% plasmacytoid cells).
  • Extensive testing, including serum/urine electrophoresis and immunoelectrophoresis, failed to detect monoclonal protein.
  • Immunoperoxidase studies showed plasma cells negative for cytoplasmic immunoglobulins (IgG, M, A, E, D, kappa, lambda).
  • Bone imaging revealed no characteristic myeloma lesions.

Findings:

  • Despite the absence of detectable monoclonal protein and bone lesions, the patient was diagnosed with non-secretory multiple myeloma.

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  • The patient demonstrated a positive clinical response to melphalan and prednisone (MP therapy).

    • Implications:

    • This case underscores the diagnostic challenge of non-secretory multiple myeloma, emphasizing the need for bone marrow examination in unexplained anemia.
    • The successful treatment response suggests that MP therapy is effective even in the absence of measurable disease markers.
    • Further research into the pathogenesis and diagnostic criteria for non-secretory myeloma is warranted.