Courtesy of Nasreen Syed, MD.
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Ocular Pathology/Oncology
Retinoblastoma with high-risk histopathologic feature. Massive choroidal invasion (between arrowheads) is defined as an invasive focus of tumor with a maximum diamater (in any dimension) of invasive focus of tumor measuring at least 3 mm and tumor reaching at least the inner fibers of the scleral tissue.