Grinspan describes the nevus as all circumscript malformations of the skin and ectodermal mucosas, hereditary or not, having or not having nevus cells or pigmented alterations.  Included in the nevi of the oral cavity we have: epithelial, acquired, derived from the neural crest, vascular (angiomas), connective, nervous, adipose, osseous, cartilaginous and dental.  In this page we will only show some pigmented nevi.