Facial Melanoma

Question 1

Pseudonetwork pattern = facial naevus

Answer 1

corresponds to a brown structureless area interrupted by follicular openings

Question 2

Dermoscopic features associated with lentigo maligna

Answer 2

Concentric circles (circles within a circles)
Grey circles
Asymmetric pigmented follicular openings
Rhomboidal structures/zig zag pattern
Blotches with obliteration of follicular openings

Question 3

Histopathologic correlate of -
Concentric circles (circles within a circles)
Grey circles
Asymmetric pigmented follicular openings
Rhomboidal structures/zig zag pattern
Blotches with obliteration of follicular openings

Answer 3

Junctional proliferation of atypical melanocytes along the DEJ with varying degrees of follicular and dermal invasion

Question 4

Grey circles can also be seen in pigmented AKs

Answer 4

Grey to beige homogenous areas surrounding the hair follicle but sparing the follicular opening