Malignant Orbital Melanoma Associated with Oculodermal Melan
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A 50-year-old man diagnosed in childhood with right oculodermal melanocytosis, presented with overnight onset of proptosis, ophthalmoplegia, and pain. Fat saturated, T1-weighted magnetic resonance imaging with gadolinium, demonstrates a large heterogeneously enhancing, predominantly extraconal mass, abutting the temporal lobe dura through a bony defect in the lateral orbital wall. Ocular examination revealed no uveal mass. Lateral orbitotomy and biopsy revealed pigmented melanoma cells infiltrating orbital tissue with perineural and perivascular invasion (Fig 1D). Orbital malignant melanoma associated with Nevus of Ota has rarely been reported. Tumor hemorrhage presumably instigated his rapid onset symptoms.....

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