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

looped

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

curved

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

serpentine

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

helical

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

coiled

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

clustered

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

serpiginous

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

linear

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

centred

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

radial

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

reticular

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

branched

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

stratum corneum

chaos and clues - color interpretation - melanin in stratum corneum

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

dermo-epidermal junction

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

papillary dermis

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

reticular dermis

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

keratin and melanin

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

keratin

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

collagen or keratin deposition in stratum corneum

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

oxygenated blood

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

deoxygenated blood

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

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

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

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

chaos and clues - color interpretation - color of keratin

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

chaos and clues - color interpretation - oxygenated blood

chaos and clues - color interpretation - deoxygenated blood

chaos and clues - what are the 8 clues of malignancy

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

chaos and clues - what are polymorphous blood vessels

blood vessel pattern which shows more than 1 structure or arrangement

chaos and clues - malignancy clue in this image

eccentric structureless

chaos and clues - malignancy clue in this image

thick lines reticular

chaos and clues - malignancy clue in this image

grey dots

chaos and clues - malignancy clue in this image

peripheral black dots

chaos and clues - malignancy clue in this image

radial lines peripheral

chaos and clues - malignancy clue in this image

white lines

chaos and clues - malignancy clue in this image

polymorphous blood vessels

chaos and clues - malignancy clue in this image

parallel ridge pattern

chaos and clues - clues - what is a structureless zone

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

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

any zone not in the center

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

when the lines are thicker than the spaces they enclose

chaos and clues - what does 'pagetoid spread' mean

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

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

benign - circumferential malignant - segmental ie only parts have it

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

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