Non-melanocytic Neoplasms

Question 1

Dermoscopic structures with high specificity for BCC

Answer 1

Blue grey ovoid nests, globules, dots
Leaflike areas
Spoke wheel areas (variant of leaflike areas)

Question 2

Blue grey ovoid nests and globules in BCC

Answer 2

Large and small BCC nodules in the dermis

Question 3

Blue grey dots in BCC

Answer 3

Small BCC nests at the DEJ or superficial dermis

Question 4

Leaflike areas and spoke wheel areas in BCC

Answer 4

Pigmented BCC nests connected to each other at the DEJ

Question 5

Specific dermoscopic structure for non-pigmented actinic keratosis

Answer 5

Strawberry pattern

Question 6

Strawberry pattern in actinic keratosis

Answer 6

Localised increase in vasculature

Follicular hyperkeratosis

Question 7

Specific dermoscopic structure in well diff SCC and KA

Answer 7

White circles

Question 8

White circles in well diff SCC and KA

Answer 8

Acanthosis of infundibular epidermis

Hypergranulosis of infundibular epidermis

Question 9

Specific dermoscopic structure for pigmented SCC in situ (Bowen disease)

Answer 9

Linear dark dots/globules

Question 10

Linear dark dots in pigmented SCC in situ (Bowen disease)

Answer 10

Atypical clusters of pigmented basal keratinocytes

Question 11

Specific dermoscopic structure for seborrhoeic keratosis

Answer 11

Milia-like cysts

Comedo-like openings

Question 12

Milia-like cysts in seborrhoeic keratosis

Answer 12

Intraepidermal keratin cysts

Question 13

Comedo-like openings in seborrhoeic keratosis

Answer 13

Epidermal invagination filled with keratin

Question 14

Specific dermoscopic structure for dermatofibroma

Answer 14

Central white patch (in combination with a peripheral network)

Question 15

Central white patch in dermatofibroma

Answer 15

Fibrosis in the papillary dermis

Question 16

Vessels in BCC

Answer 16

Arborising vessels (large branched) - nodular BCC
Serpentine vessels (linear irregular) - superficial BCC

Question 17

Vessels in SCC in situ (Bowen disease)

Answer 17

Glomerular vessels (coiled)

Question 18

Vessels in keratinocytic tumours I.e. warts, seborrhoeic keratosis, KA

Answer 18

Hairpin vessels (looped)

Question 19

Vessels in vascular tumours

Answer 19

Red purple lacunae - angioma

Blue black lacunae - angiokeratoma

Question 20

Vessels in clear cell acanthoma

Answer 20

String of pearls (dotted vessels in serpiginous arrangement)

Question 21

Vessels in sebaceous hyperplasia

Answer 21

Crown vessels (radial vessels that do not cross centre of lesion)

Question 22

Vessels in malignancies i.e. melanoma, Merkel cell CA, angiosarcoma, SCC

Answer 22

Polymorphous

Question 23

Dotted vessels (red dots)

Answer 23

Stasis dermatitis
Inflammatory conditions
Spitz naevus
Melanoma