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Amylase-producing multiple myeloma.

H Fujii1, H Yashige, T Kanoh

  • 1Third Department of Internal Medicine, Kyoto First Red Cross Hospital, Japan.

Archives of Pathology & Laboratory Medicine
|September 1, 1991
PubMed
Summary
This summary is machine-generated.

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Amylase-producing multiple myeloma is a rare subtype characterized by high serum amylase levels and extensive extramedullary spread. This condition often presents with poor prognosis and unique chromosomal abnormalities.

Area of Science:

  • Hematology
  • Oncology

Background:

  • Multiple myeloma is a hematologic malignancy characterized by malignant plasma cells.
  • Amylase-producing multiple myeloma is a rare subtype with distinct clinical and pathological features.

Observation:

  • A case of amylase-producing multiple myeloma with extensive extramedullary spread was managed.
  • A review of five cases, including the current one, revealed unique clinicopathologic characteristics.

Findings:

  • All five patients exhibited significantly elevated serum amylase activity, specifically of the S type.
  • Extensive extramedullary spread, including tumors, pleural effusions, or ascites, was observed in all cases.
  • Bone destruction was noted in most cases, and survival was generally less than one year.
  • A common feature in established myeloma cell lines was a translocation of chromosome 1, potentially linking to amylase gene expression.

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Implications:

  • Amylase-producing multiple myeloma presents with unique features that warrant specific diagnostic and therapeutic considerations.
  • The identified chromosomal translocation may offer insights into the pathogenesis of this myeloma subtype.
  • Further research into this rare entity could improve understanding and patient outcomes.