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Related Experiment Videos

Orbital granulocytic sarcoma

F A Stockl1, A M Dolmetsch, M A Saornil

  • 1Department of Ophthalmology, McGill University, Montreal, Quebec, Canada.

The British Journal of Ophthalmology
|March 14, 1998
PubMed
Summary

Orbital granulocytic sarcoma, a myeloid tumor, can be challenging to diagnose in children. MAC387 immunohistochemistry shows promise as a reliable diagnostic marker, aiding in early detection and treatment.

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Area of Science:

  • Ophthalmology
  • Oncology
  • Hematology

Background:

  • Orbital granulocytic sarcoma is a rare myeloid cell tumor.
  • Histological diagnosis is challenging in poorly differentiated cases without systemic leukemia.
  • Early diagnosis is crucial due to potential for rapid proptosis.

Observation:

  • A case series of seven pediatric patients with orbital granulocytic sarcoma was analyzed.
  • Tumor presentation varied, preceding, coinciding with, or following systemic leukemia.
  • Staining characteristics were evaluated using Leder stain, lysozyme, and MAC387.

Findings:

  • Leder stain was positive in 86% of cases, lysozyme in 71%.
  • MAC387 immunohistochemistry was positive in 100% of cases.
  • MAC387 identified a case negative for both Leder and lysozyme stains.

Implications:

  • Orbital granulocytic sarcoma requires prompt diagnosis and management.
  • Combined Leder and lysozyme stains are useful diagnostic tools.
  • MAC387 may serve as a more sensitive and reliable marker for orbital granulocytic sarcoma.

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