MeSH 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.;
MeSH annotation : /blood supply /chem /second /secret /ultrastruct permitted; coord IM with histol type
of neopl (IM); coordinate with histological type of neoplasm;
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.