Retinal ependymoma: an immunohistologic and ultrastructural study.

Area of Science:

• Ophthalmology
• Neuropathology
• Oncology

Background:

• Glial tumors of the retina are uncommon, with most linked to genetic syndromes like neurofibromatosis type 1 and tuberous sclerosis complex.
• Acquired diffuse astrocytomas are less frequent, and ependymomas are exceptionally rare in the retina.

Observation:

• This report presents the clinicopathologic features of the second documented case of a retinal ependymoma.
• The tumor was sporadic, unilateral, low-grade, and cellular in type.
• Its chronic progression and significant size led to an initial misdiagnosis of massive retinal gliosis.

Findings:

• Confirmed diagnosis of retinal ependymoma in a sporadic case.
• Demonstrated a low-grade, cellular tumor with a chronic clinical course.
• Highlighted the potential for misdiagnosis as massive retinal gliosis.

Implications:

• Adds to the scarce literature on retinal ependymomas, aiding future diagnosis and research.
• Underscores the importance of considering rare glial neoplasms in retinal pathology.
• Contributes to understanding the spectrum of retinal glial neoplasia.