Chaos and clues algorithm Flashcards

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1
Q

What lesions are ‘chaos and clues’ suitable for assessing

A

pigmented skin lesions

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2
Q

What kind of tool is ‘chaos and clues’

A

decisionmaking tool

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3
Q

what are the possible final decisions after applying ‘chaos and clues’

A

Biopsy
No intervention

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4
Q

What are the broad criteria that means biopsy in ‘chaos and clues’

A

chaos in lesion
at least 1 clue

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5
Q

Chaos and clues
- how do you define chaos

A

asymmetry of structure or color

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6
Q

Chaos and clues
- how do you analyse structure

A

revised pattern analysis

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7
Q

Chaos and clues - revised pattern analysis
- what are the 6 structures

A
  • lines
  • pseudopods
  • circle
  • clod
  • dot
  • structureless
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8
Q

Chaos and clues - revised pattern analysis
- what are the 5 types of lines

A
  • reticular
  • branched
  • parallel
  • radial
  • curved
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9
Q

Chaos and clues - what is this structure

A

line

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10
Q

Chaos and clues - what is this structure

A

pseudopod

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11
Q

Chaos and clues - what is this structure

A

circle

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12
Q

Chaos and clues - what is this structure

A

clod

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13
Q

Chaos and clues - what is this structure

A

dot

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14
Q

Chaos and clues - what type of line is this

A

reticular (network)

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15
Q

Chaos and clues - what type of line is this

A

branched

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16
Q

Chaos and clues - what type of line is this

A

parallel

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17
Q

Chaos and clues - what type of line is this

A

radial

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18
Q

Chaos and clues - what type of line is this

A

curved

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19
Q

Chaos and clues - blood vessel analysis - 2 broad elements in vessel pattern

A

structure
arrangement

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20
Q

chaos and clues - blood vessel analysis - 8 different structures

A

dots (A), clods (B), lines (C), looped (D), curved (E), serpentine (F), helical (G), coiled (H)

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21
Q

chaos and clues - blood vessel analysis - 8 different arrangements

A

random (A), clustered (B), serpiginous (C), linear (D), centred (E), radial (F), reticular (G), branched (H)

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22
Q

chaos and clues - blood vessel analysis - what is this structure

A

dots

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23
Q

chaos and clues - blood vessel analysis - what is this structure

A

clods

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24
Q

chaos and clues - blood vessel analysis - what is this structure

A

lines

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25
Q

chaos and clues - blood vessel analysis - what is this structure

A

looped

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26
Q

chaos and clues - blood vessel analysis - what is this structure

A

curved

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27
Q

chaos and clues - blood vessel analysis - what is this structure

A

serpentine

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28
Q

chaos and clues - blood vessel analysis - what is this structure

A

helical

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29
Q

chaos and clues - blood vessel analysis - what is this structure

A

coiled

30
Q

chaos and clues - blood vessel analysis - what is this arrangement

A

clustered

31
Q

chaos and clues - blood vessel analysis - what is this arrangement

A

serpiginous

32
Q

chaos and clues - blood vessel analysis - what is this arrangement

A

linear

33
Q

chaos and clues - blood vessel analysis - what is this arrangement

A

centred

34
Q

chaos and clues - blood vessel analysis - what is this arrangement

A

radial

35
Q

chaos and clues - blood vessel analysis - what is this arrangement

A

reticular

36
Q

chaos and clues - blood vessel analysis - what is this arrangement

A

branched

37
Q

chaos and clues - color interpretation - this color indicates melanin in which skin layer

A

stratum corneum

38
Q

chaos and clues - color interpretation - melanin in stratum corneum

A
39
Q

chaos and clues - color interpretation - this color indicates melanin in which skin layer

A

dermo-epidermal junction

40
Q

chaos and clues - color interpretation - this color indicates melanin in which skin layer

A

papillary dermis

41
Q

chaos and clues - color interpretation - this color indicates melanin in which skin layer

A

reticular dermis

42
Q

chaos and clues - color interpretation - this color indicates a mix of … and …

A

keratin and melanin

43
Q

chaos and clues - color interpretation - this color indicates what skin component

A

keratin

44
Q

chaos and clues - color interpretation - this color indicates .. or …

A

collagen or keratin deposition in stratum corneum

45
Q

chaos and clues - color interpretation - this color indicates …

A

oxygenated blood

46
Q

chaos and clues - color interpretation - this color indicates …

A

deoxygenated blood

47
Q

chaos and clues - color interpretation - color of melanin in dermo-epidermal junction

A
48
Q

chaos and clues - color interpretation - color of melanin in papillary dermis

A
49
Q

chaos and clues - color interpretation - color of melanin in reticular dermis

A
50
Q

chaos and clues - color interpretation - mix of keratin and melanin

A
51
Q

chaos and clues - color interpretation - color of keratin

A
52
Q

chaos and clues - color interpretation - color of collagen, keratin in stratum corneum

A
53
Q

chaos and clues - color interpretation - oxygenated blood

A
54
Q

chaos and clues - color interpretation - deoxygenated blood

A
55
Q

chaos and clues - what are the 8 clues of malignancy

A

1 – eccentric structureless (blue),
2 – thick lines reticular (arrow),
3 – grey dots,
4 – black dots, peripheral,
5 – radial lines, segmental (arrow),
6 – white lines,
7 – polymorphous vessels,
8 – parallel ridge pattern

55
Q

chaos and clues - what are polymorphous blood vessels

A

blood vessel pattern which shows more than 1 structure or arrangement

56
Q

chaos and clues - malignancy clue in this image

A

eccentric structureless

57
Q

chaos and clues - malignancy clue in this image

A

thick lines reticular

58
Q

chaos and clues - malignancy clue in this image

A

grey dots

59
Q

chaos and clues - malignancy clue in this image

A

peripheral black dots

60
Q

chaos and clues - malignancy clue in this image

A

radial lines peripheral

61
Q

chaos and clues - malignancy clue in this image

A

white lines

62
Q

chaos and clues - malignancy clue in this image

A

polymorphous blood vessels

63
Q

chaos and clues - malignancy clue in this image

A

parallel ridge pattern

64
Q

chaos and clues - clues - what is a structureless zone

A

any zone of a lesion that isn’t skin colored but doesn’t fit with the other colors either

65
Q

chaos and clues - structureless zones - location on lesion that suggests malignancy

A

any zone not in the center

66
Q

chaos and clues - clues - when are reticular or branched zones suspicious

A

when the lines are thicker than the spaces they enclose

66
Q

chaos and clues - what does ‘pagetoid spread’ mean

A

spreading of melanin filled melanocytes in superficial epidermis, usually dark black

67
Q

chaos and clues - clues - when are radial lines benign vs sign of malignancy

A

benign - circumferential
malignant - segmental ie only parts have it

68
Q

chaos and clues - melanoma clues - parallel ridging is associated with what skin gland

A

Melanin pigment that is concentrated on the broader ridges which are defined by the eccrine duct openings, is a clue to melanoma even in the absence of chaos

69
Q
A