1. Blue-White (Veil)
 An irregular indistinct
whitish film
superimposed on an area
of diffuse blue pigment
 If overlying the raised
portion of the lesion it
represents dermal
melanin in combination
with compact
orthokeratosis

2. Compact orthokeratosis and dermal melanin

3. Blue-white veil

4. Regression
May occur in:
 Melanocytic lesions
 Solar lentigines
 Seborrheic keratoses
 Actinic keratoses

5. Regression characterized by:
 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

6. Fibrosis
Melanin

7. Regression

8. Pattern Analysis
The differentiation of
melanocytic nevi from
melanoma

9. The evaluation of
melanocytic lesions:
 Colors
 Symmetry
 Organization

10.  Black Benign lesions generally
 Brown have 3 or less colors. The
most common colors being
 Gray
light brown, dark brown,
 Blue
and black.
 Red
 White
 Yellow Malignant lesions generally
have more than 3 colors.