Diagnostic reference — red flags & the differential, by presenting complaint
Pick a presenting complaint below. Selected presentations open a practice reference pack for learning and revision: the published NICE / Macmillan red-flag and urgency rules for that presentation, then each differential with its key features, discriminators and what the guidance says, in a fixed order. There is a side-by-side Compare view and a Self-test checklist. Nothing is calculated from what you tick, and it does not diagnose or triage anyone. Every other presentation opens its structured visual pathway.
NICE NG12 / Macmillan rapid-referral / NICE thresholds. Every rule in the pack is listed by tier — emergency, suspected cancer pathway, urgent, routine — with its patient phrase, source and proforma link.
Each differential in the pack's own order — common, less common and don't-miss — with the key features to ask about, the features that point towards or away (ICHD-3 / SNNOOP10 / TiTrATE / NICE criteria), the key examination finding and the next step the guidance gives. Not ranked or scored.
Choose a presenting complaint
Practice reference packs show the red-flag rules and differential reasoning from the guidance. The remaining presentations open their structured algorithm pathway in the Algorithms library.
Practice reference pack
Showing the reference pack for the selected presentation. Pick another teal presentation above to switch.
1 · Pick the presenting complaint
Browse or search the grouped list. Teal cards open a practice reference pack; the rest open a structured visual pathway. A teal card also offers a small “pathway ↗” link to its algorithm.
2 · Read the red flags
Every red-flag and urgency rule in the pack, grouped by tier, with its source and the wording to explain it.
3 · Study the differential
Each diagnosis card gives the key features, the discriminators, the key examination finding, what the guidance says next, the NICE link and the matching full case. Use Compare to see them side by side.
4 · Test yourself
The Self-test checklist hides the teaching note for each feature until you tick it. It never adds up or ranks your ticks.