Symmetric radial streamingFocal radial streaming
Radial streaming
Pseudopods / streaks Finger-like projections of dark pigment at the periphery of a lesion
May have small knobs at the tip
Histologically represent confluent junctional nests of melanocytes
from Menzies et al. 2003 An atlas of surface microscopy of pigmented skin lesions
Confluent junctional nests of melanocytes of varying sizes and shapes in a melanoma
Pseudopods
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: