Blue-White (Veil) An irregular indistinct An irregular indistinct whitish film whitish film superimposed on an area superimposed on an area of diffuse blue pigmentof diffuse blue pigment

If overlying the raised If overlying the raised portion of the lesion it portion of the lesion it represents dermal represents dermal melanin in combination melanin in combination with compact with compact orthokeratosisorthokeratosis

Compact orthokeratosis and dermal melanin

Blue-white veil

Regression

May occur in:

Melanocytic lesions

Solar lentigines

Seborrheic keratoses

Actinic keratoses

Well localized blue-gray dots or granules Diffuse multiple blue-gray dots or granules on a background of hypomelanosis Histologically represents melanin and fibrosis in the papillary dermis

Regression characterized by:

Melanin

Fibrosis

Regression

Pattern AnalysisPattern AnalysisThe differentiation of The differentiation of

melanocytic nevi from melanocytic nevi from melanomamelanoma

Colors

Symmetry

Organization

The evaluation of melanocytic lesions:

BlackBlack

Brown Brown

GrayGray BlueBlue

RedRed

WhiteWhite YellowYellow

Benign lesions generally have 3 or less colors. The most common colors being light brown, dark brown, and black.

Malignant lesions generally have more than 3 colors.