Derm SAQs ·
Dermoscopy and image-based diagnosis — SAQ
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Stem
You run a skin lesion clinic with handheld polarised and immersion dermatoscopes plus digital monitoring. Three problems present in one list: (A) a chaotic flat pigmented back lesion, (B) a pigmented macule on the sole, and (C) a feature-poor flat naevus the patient wants “watched.”
Questions
a) Outline the two-step dermoscopic algorithm and state how polarised vs immersion modes differ in practice. (2 marks)
b) For lesion A, explain chaos-and-clues decision-making and name two melanoma-specific structural clues. (3 marks)
c) For lesion B, contrast parallel ridge vs parallel furrow patterns and state the management implication of ridge pattern. (3 marks)
d) For lesion C, list two criteria that make short-term digital monitoring acceptable and two red flags that forbid monitoring. (2 marks)