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[Orbital granulocytic sarcoma: case report]
Nilson Lopes da Fonseca Junior1, Luis Paves, Deise Mitsuko Nakanami
1Departamento de Oftalmologia, Universidade Federal de São Paulo, São Paulo, SP. lopesdafonseca@uol.com.br
Arquivos Brasileiros De Oftalmologia
|December 3, 2005
Summary
Orbital granulocytic sarcoma, a myeloid tumor, can occur without leukemia. This rare case highlights its potential for long-term absence of systemic leukemia, challenging diagnosis.
Area of Science:
- Oncology
- Hematology
Background:
- Orbital granulocytic sarcoma is a rare myeloid malignancy.
- It can occur with or without acute myelogenous leukemia (AML).
- Typically affects children and young adults with a slight male predominance.
Observation:
- An uncommon case of a 33-year-old Latin-American woman with rapidly progressive orbital proptosis.
- No systemic leukemia manifestations were present at diagnosis or during a 30-month follow-up.
- Orbital granulocytic sarcoma can precede systemic leukemia, but prolonged absence is unusual.
Findings:
- The case presented a diagnostic challenge due to the absence of systemic leukemia.
- Differential diagnosis included lymphoma, rhabdomyosarcoma, and neuroblastoma.
- Biopsy is often necessary for definitive diagnosis.
Implications:
- Orbital granulocytic sarcoma should be considered in orbital tumors, even without systemic leukemia.
- This case underscores the importance of considering granulocytic sarcoma in adults presenting with isolated orbital masses.
- Diagnostic and treatment strategies may need individualization, especially in non-leukemic presentations.