The three-step sequence

TADA proceeds through three decision points. Each step either resolves the assessment or advances to the next level of analysis.

Step 1 — Benign pattern recognition Can you confidently identify this as one of three clearly benign lesion types? If yes, you're done. If not, move on.

Step 2 — Organisation assessment Is the lesion's structure organised (symmetric, orderly) or disorganised (asymmetric, chaotic)? Organised lesions can be monitored. Disorganised lesions need closer scrutiny.

Step 3 — Feature recognition Does the disorganised lesion show any of seven specific high-risk features? If any are present, further evaluation is warranted. If none are present, close monitoring with safety-netting is appropriate.

The logic of the sequence

Notice how each step narrows the field. Step 1 clears the obviously benign — and in primary care, this is a large proportion of what you'll see. Step 2 filters the remainder by structural organisation. Step 3 looks for specific red flags in the lesions that have already raised concern.

This cascading structure means you're never overwhelmed by the full complexity of dermoscopic analysis. At any given moment, you're answering one question.

Why this sequence works

The design is deliberately efficient. Most lesions you encounter in primary care will resolve at Step 1 — they're clearly benign and need no further analysis. Of those that reach Step 2, many will be organised and suitable for monitoring. Only a small proportion reach Step 3, where you're looking for specific features.

This means you're doing the most detailed analysis only on the lesions that have already raised concern through two prior filters. That's how TADA reduces cognitive load — not by simplifying the analysis, but by ensuring you only apply detailed analysis where it's needed.