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Primary extramedullary orbital plasmacytoma in a child
M C Sharma1, A K Mahapatra, S Gaikwad
1Department of Pathology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India.
Summary
This study reports a rare orbital extramedullary plasmacytoma in a child. Surgical removal and radiotherapy were successfully used to treat the localized tumor.
Area of Science:
- Ophthalmology
- Oncology
- Pathology
Background:
- Extramedullary plasmacytoma is a rare plasma cell tumor that can occur outside the bone marrow.
- Orbital involvement is exceptionally uncommon, particularly in pediatric patients.
Observation:
- An 11-year-old boy presented with a rare extramedullary plasmacytoma of the orbit.
- Immunoperoxidase staining confirmed the plasma cell origin, positive for IgG and kappa light chains.
- Systemic evaluation, including serum/urine electrophoresis and bone marrow aspiration, revealed no evidence of disseminated disease.
Findings:
- The orbital tumor was characterized as a localized extramedullary plasmacytoma.
- Immunohistochemical analysis demonstrated specific light chain restriction (kappa).
- Absence of M spike and generalized involvement confirmed the isolated nature of the tumor.
Implications:
- This case highlights the importance of considering rare orbital tumors in pediatric differential diagnoses.
- Complete surgical excision followed by adjuvant radiotherapy can be an effective treatment strategy for localized orbital extramedullary plasmacytoma.
- Further research into the pathogenesis and optimal management of pediatric extramedullary plasmacytomas is warranted.