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Malignant teratoid medulloepithelioma in eye
S B Pradhan1, R C Adhikari, B Shrestha
1Department of Pathology, Kathmandu Medical College, Sinamangal, Kathmandu, Nepal. saileshpradhan@hotmail.com
Kathmandu University Medical Journal (KUMJ)
|December 13, 2005
Summary
Malignant teratoid medulloepithelioma is a rare pediatric eye tumor. This case highlights its aggressive features and the importance of accurate diagnosis in orbital tumors.
Area of Science:
- Ophthalmology
- Pediatric Oncology
- Pathology
Background:
- Malignant teratoid medulloepithelioma is an exceptionally rare orbital tumor primarily affecting children under five.
- These tumors typically originate from the ciliary body epithelium or iris, with rarer occurrences in the optic nerve and retina.
Observation:
- A 5-year-old boy presented with right eye pain, redness, and proptosis.
- Histopathological examination revealed a tumor with both epithelial and sarcomatoid components, exhibiting primitive cells, frequent mitoses, necrosis, hemorrhage, calcification, and mature cartilage.
Findings:
- The tumor showed vascular and optic nerve invasion, indicating aggressive behavior.
- Frequent mitoses (7-10/HPF in epithelial component, 5-7/HPF in sarcomatoid component) were noted.
- This represents the second diagnosis of malignant teratoid medulloepithelioma at the institution in a decade.
Implications:
- Accurate differentiation from other small cell orbital tumors is crucial for appropriate management.
- This case underscores the rarity and aggressive nature of malignant teratoid medulloepithelioma in pediatric patients.
- Reporting rare orbital malignancies aids in understanding their diverse presentations and improving diagnostic strategies.