Melanoma of the ciliary body with extrascleral extension, presenting as an ocular surface mass. Note that there is no PAM surrounding the nodule, a clue that the lesion might have an intraocular origin. Also note that the lesion is associated with deep episcleral/scleral vessels (sentinel vessels, arrow) and does not obscure the overlying conjunctival vessels. This indicates that the lesion is deep to the conjunctiva.