Definition: Tumors of the iris characterized by increased pigmentation of melanocytes. Iris nevi are composed of proliferated melanocytes and are associated with neurofibromatosis and malignant melanoma of the choroid and ciliary body. Malignant melanoma of the iris often originates from preexisting nevi.
/blood supply /chem /second /secret /ultrastruct permitted; coord IM with histol type of neopl (IM)
Other names Neoplasm, Iris; Iris Neoplasm; Neoplasms, Iris