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Special location: Facial melanocytic lesions

Lentigo Maligna (melanoma in situ on severely sun-damaged skin)

Few or no classic dermoscopic criteria of malignancy Atypical pseudonetwork typified by different morphologic aspects according to the melanoma progression:


Annular-granular structures

Multiple blue-gray dots surrounding the follicular ostia with an annular-granular appearance


Gray pigment pseudonetwork

Gray pigmentation surrounding the follicular ostia, formed by the confluence of annular-granular structures


Rhomboidal structures

Gray-brown pigmentation surrounding the follicular ostia with a rhomboidal appearance


Asymmetric pigmented follicles

Eccentric annular pigmentation around follicular openings (Criteria modified according to Schiffner et al. J Am Acad Dermatol 2000)


Rhomboidal structures (green arrow), annular-granular structures (black arrows), and asymmetric pigmented follicles (circle) in a lentigo maligna


Gray pseudonetwork in a lentigo maligna


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