3 - Derm - Benign and Malignant Melanocytic lesions - Melanoma 2 Flashcards Preview

CP2 > 3 - Derm - Benign and Malignant Melanocytic lesions - Melanoma 2 > Flashcards

Flashcards in 3 - Derm - Benign and Malignant Melanocytic lesions - Melanoma 2 Deck (10):
1

superficial spreading melanoma (SSM) - how common? how does it grow?

most common - ~70%
radial growth within epidermis
some are invasive and enter dermis

2

SSM - ass w

increased age
UV exp
high numbers of typical/atypical naevi (~25% from pre-existing naevi)

3

SSM - locations M + F

m - commonly trunk
f - commonly legs

4

SSM clinical features

large size >6mm
irregular border
variable colour
smooth surface, then thicker, possibly dry and warty

5

SSM - indicators of invasive melanoma

thickening
increase variability of colours
2ndary features - ulceration, bleeding, itching, stinging

6

Nodular - how aggressive? less ass w what? commonly arises from?

most aggressive
less ass w UV
most commonly from normal skin/melanoma, occasionally from naevus

7

Nodular - ass w? prognosis is? DDx?

ass w high typ/nontyp naevi numbers + prev/current melanoma
poor prog
confused with pyogenic granuloma

8

Nodular - clinical features

>6mm dome shaped firm lump
variable pigmentation - skin/black/no pigment
surface - smooth/rough/crusted/warty
commonly - ulceration, bleeding itching, stinging

9

Acral melanoma - where? how common? common in?

arises on palms soles or under nail
rare - more in darker skinned

10

Acral - not related to? disease course?

Not related to UV exposure
initial in-situ phase - may become rapidly invasive

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