Module 3: Benign non melanocytic lesions Flashcards
4 most common benign NM lesions in practice
SK
DF
Vascular
SH
Most Non - melanocytic lesions develop after what age? Exception?
4th decade
Exception: Vascular tumour
SK and its subtypes: Dermoscopic patterns.
Acantholytic subtype Irritated SK Verrucous subtype Reticulated lentigo Ink spot lentigo Senile lentigo Lichen planus like keratosis
Acantholytic SK, features
Clearly demarcated margin
White clods - multiple (Milia-like cysts)
Black (orange) clods - multiple (Comedo like openings)
Thick lines (fissures and ridges) (Brain-like structure)
Irritated SK - features
Yellowish background Curved vessels (hairpin)
Acantholytic SK - what fruit does it resemble
Banksia fruit
Verrucous SK features
Keratotic
Structureless - lacks typical features
Reticulated SK features
Sharply demarcated pattern
Brown circles that resemble a network pattern
“Fat fingers”
Solar lentigo is initial form of …
SK
SL features
Sharp demarcation
“Moth eaten” borders
Fingerprint like structures
SL - what are fingerprint like structures?
Parallel curved lines
LPLK features
Multiple grey dots similar in size and arrangement
LPLK - what do grey dots correspond to?
Melanophages in upper dermis or free melanin in dermis
= immune response
Pyogenic granuloma features
Rapidly growing
Easy bleeding
Bright red - no blue or purple
Structureless bright red with white intersections + ulceration
Sebaceous hyperplasia features
Typically head and neck Fatty/ oily skin Radially arranged vessels (crown vessels) Yellow structureless area Sometimes central pore
