Chaos and clues algorithm Flashcards by Shashi Ponraja

Q

What lesions are ‘chaos and clues’ suitable for assessing

A

pigmented skin lesions

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Q

What kind of tool is ‘chaos and clues’

A

decisionmaking tool

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Q

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

A

Biopsy
No intervention

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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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Q

Chaos and clues
- how do you define chaos

A

asymmetry of structure or color

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Q

Chaos and clues
- how do you analyse structure

A

revised pattern analysis

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Q

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

A

lines
pseudopods
circle
clod
dot
structureless

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Q

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

A

reticular
branched
parallel
radial
curved

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Q

Chaos and clues - what is this structure

A

line

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Q

Chaos and clues - what is this structure

A

pseudopod

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Q

Chaos and clues - what is this structure

A

circle

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Q

Chaos and clues - what is this structure

A

clod

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Q

Chaos and clues - what is this structure

A

dot

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Q

Chaos and clues - what type of line is this

A

reticular (network)

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Q

Chaos and clues - what type of line is this

A

branched

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Q

Chaos and clues - what type of line is this

A

parallel

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Q

Chaos and clues - what type of line is this

A

radial

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Q

Chaos and clues - what type of line is this

A

curved

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Q

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

A

structure
arrangement

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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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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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Q

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

A

dots

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Q

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

A

clods

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Q

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

A

lines

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Q

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

A

looped

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Q

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

A

curved

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Q

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

A

serpentine

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Q

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

A

helical

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Q

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

A

coiled

Q

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

A

clustered

Q

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

A

serpiginous

Q

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

A

linear

Q

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

A

centred

Q

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

A

radial

Q

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

A

reticular

Q

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

A

branched

Q

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

A

stratum corneum

Q

chaos and clues - color interpretation - melanin in stratum corneum

A

Q

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

A

dermo-epidermal junction

Q

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

A

papillary dermis

Q

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

A

reticular dermis

Q

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

A

keratin and melanin

Q

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

A

keratin

Q

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

A

collagen or keratin deposition in stratum corneum

Q

chaos and clues - color interpretation - this color indicates …

A

oxygenated blood

Q

chaos and clues - color interpretation - this color indicates …

A

deoxygenated blood

Q

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

A

Q

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

A

Q

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

A

Q

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

A

Q

chaos and clues - color interpretation - color of keratin

A

Q

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

A

Q

chaos and clues - color interpretation - oxygenated blood

A

Q

chaos and clues - color interpretation - deoxygenated blood

A

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

Q

chaos and clues - what are polymorphous blood vessels

A

blood vessel pattern which shows more than 1 structure or arrangement

Q

chaos and clues - malignancy clue in this image

A

eccentric structureless

Q

chaos and clues - malignancy clue in this image

A

thick lines reticular

Q

chaos and clues - malignancy clue in this image

A

grey dots

Q

chaos and clues - malignancy clue in this image

A

peripheral black dots

Q

chaos and clues - malignancy clue in this image

A

radial lines peripheral

Q

chaos and clues - malignancy clue in this image

A

white lines

Q

chaos and clues - malignancy clue in this image

A

polymorphous blood vessels

Q

chaos and clues - malignancy clue in this image

A

parallel ridge pattern

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

Q

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

A

any zone not in the center

Q

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

A

when the lines are thicker than the spaces they enclose

Q

chaos and clues - what does ‘pagetoid spread’ mean

A

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

Q

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

A

benign - circumferential
malignant - segmental ie only parts have it

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

Q

A