Grey-Blue Regression in Melanoma In Situ—Evaluation on 111 Cases

Table 1

Eleven variables of regression and their definitions.

Parameter	Definition
(1) Regression	Presence of grey-blue areas and/or peppering and/or blue-whitish veil and/or white areas
(2) Grey-blue areas	Bluish and/or larger areas of grey-blue pigmentation
(a) Structureless	Grey-blue homogeneous pigmentation
(b) Reticular	Coarse blue-grey net, with thick grey-blue lines and large holes
(c) Globular	Aggregated grey-blue globules
(3) Peppering	Blue, fine pepper-like structures
(4) White areas	White scar-like areas
(5) Blue-whitish veil	Compact, structureless, irregular, and confluent blue-whitish pigmentation. Similar to a superficial veil, palpable over the lesion
(6) Pink areas	Areas of the lesion lighter than the surrounding skin with a pinkish shade
(7) Light brown areas	Light brown structureless irregular areas
(8) Regression of dermoscopic structures	Fading of net, globules, or pigmentation giving rise to light brown areas or small structureless areas within a structured area