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Dermoscopy Certificate > Dermoscopy Certificate > Flashcards

Dermoscopy Certificate Flashcards

1
Q

Outline the Three Point Checklist

A
  1. Asymmetry (asymmetrical distribution of colours/dermoscopic structures)
  2. Irregular Network (Pigmented network with irregular holes and thick lines)
  3. Blue/white structures

2/3 –> Positive for melanocytic lesion

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2
Q

Outline the chaos and clues method

A

pigmented lesion –> chaos present –> clue present –> biopsy. If no chaos –> no biopsy, if no clue no intervention

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3
Q

What are the exceptions to Chaos and Clues “no intervention”?

A
  1. Changing lesions on adults
  2. Nodular/small lesions with any clue
  3. Head/neck; pigmented circles/dermatoscopical grey
  4. Acral: parallel ridge pattern
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4
Q

What are the five basic patterns in pattern analysis

A 
Lines
Pseudopods
Circles
Clods
Dots
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5
Q

What subtypes of “lines” are there in pattern analysis

A 
Reticular
Branched
Parallel
Radial
Curved
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6
Q

In revised pattern analysis, define a LINE

A

A two dimensional continuous object with length greatly exceeding width

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7
Q

In revised pattern analysis, define a PSEUDOPOD

A

A line with a bulbous end

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8
Q

In revised pattern analysis, define a CIRCLE

A

A curved line sensibly equidistant from a central point

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9
Q

In revised pattern analysis, define a CLOD

A

Any well circumscribed, solid object larger than a dot. Clods may have any shape and any colour.

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10
Q

In revised pattern analysis, define a DOT

A

An object too small to have a discernible shape

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11
Q

In revised pattern analysis, define STRUCTURELESS

A

An area with no basic structure predominating

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12
Q

Define CHAOS

A

Asymmetry of structure or colour (not outline)

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13
Q

How can you remember the clues?

A 
GET BLACK LoLLiPoPs
Grey or blue structures
Eccentric structureless areas
Thick lines reticular
Black dots or clods peripheral
Lines radial or segmental, pseudopods
Lines white
Liens parallel ridges (palms/soles) or chaotic (nails)
Polymorphous vessels
Polygons
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14
Q

What is sebaceous hyperplasia?

A

Enlarged sebaceous glands typically on the forehead or cheek, usually in a person with oily skin

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15
Q

What are the dermatoscopic features of sebaceous hyperplasia?

A

Yellow structureless areas in centre.
Radial arranged linear vessels that do NOT cross the centre
Central pore

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16
Q

What rules do you use to avoid missing a melanoma when you think there is a benign lesion on dermoscopy?

A
  1. Biopsy lesions with a verrucous surface in the absence of other benign criteria
  2. Always biopsy regressive lesions (includes lichen planus like keratoses)
  3. Pyogenic granuloma is a biopsy diagnosis
17
Q

What mimics pyogenic granuloma?

A

Amelanotic melanoma

18
Q

What is lichenoid keratosis?

A

Also known as lichen planus like keratosis.

Lichenoid keratosis is an inflammatory reaction arising in a regressing existing solar lentigo or seborrhoeic keratosis.

19
Q

What are the dermoscopic featurs of lichenoid keratosis?

A

Uniform clusters of grey dots and, depending on the stage of the lesion, may show signs of an original pre-existing lentigo or seborrhoeic keratosis.

20
Q

What are the dermoscopic features of dermatofibroma?

A

Central white/lighter patch (compare to surroudnign skin)
Surrounding brown circles
Pigmentation is dependent on skin type- ie in blacker skin; will be darker

21
Q

What are the three common benign vascular tumours?

A

Haemangioma
Pyogenic granuloma
Angiokeratoma

22
Q

What are angiokeratoma?

A

Haemangioma that induce a keratin surface reaction

23
Q

What are the dermoscopic features of an angiokeratoma?

A

Lacunas ( red, black, blue, purple)
Keratotic change on surface
Sometime presence of peripheral erythema

24
Q

What are the dermoscopic features of pyogenic granuloma?

A

Bright red with white intersecting lines +/- ulceration

25
Q

What are the clinical features of a pyogenic granuloma?

A

Rapidly growing red lesion that frequently bleeds

26
Q

What is the differential diagnosis for pigmented facial macules?

A

Lentigo maligna
Pigmented actinic keratosis
Solar lentigo
Lichenoid keratosis

27
Q

Which non melanocytic skin cancers can be differentiated by dermatoscopy?

A 
Sebaceous hyperplasia
Seborrheic keratosis
Clear cell acanthoma
Bowen's disease
Nodular cystic BCC
28
Q

What non melanocytic skin cancers can NOT be differentiated by dermatoscopy?

A

Pyogenic granuloma
Uncommon adrenal tumours
Actinic keratosis

Dermoscopy Certificate (2 decks)

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