This audit is for higher specialty trainees preparing for the SCE in Dermatology who assumed BMJ OnExamination sells a dermatology-specific bank and want to know what its analytics really tell them. Checked on 20 July 2026, the principal limitation is unavoidable and comes first: BMJ OnExamination does not publish an SCE Dermatology product. Its analytics are genuinely good, but for this exam there is no dermatology-blueprinted content underneath them.
What BMJ OnExamination offers for SCE Dermatology right now
Lead with the honest finding, because it changes every downstream decision. As of 20 July 2026, BMJ OnExamination's Specialty Certificate Examination range is Acute Medicine, Endocrinology & Diabetes, Geriatric Medicine, Respiratory Medicine, Neurology and Medical Oncology (vendor-reported, onexamination.com). There is no SCE in Dermatology product; the direct product URL returns a 404 and dermatology is absent from the site's SCE navigation. The only dermatology questions on the platform sit as a subject filter inside its MRCP(UK) Part 1 and Part 2 banks, where dermatology is a small blueprint slice, not a 200-question SCE-aligned resource.
That matters because the platform's headline strengths are real. BMJ OnExamination provides "Performance Feedback & Peer Comparison," which the vendor describes as showing "how likely you are to pass" alongside graphs that "benchmark you against your peers"; "High Impact Questions" that the vendor states are algorithmically ranked by clinical tutors and user interactions; mock tests; and filtering by topic, type and difficulty (vendor-reported, 20 July 2026). None of that helps if the underlying content is not written to the SCE Dermatology curriculum. Analytics can only measure the coverage you feed them.
| Item (SCE Dermatology) | Status on 20 July 2026 |
|---|---|
| Dedicated SCE Dermatology bank | Not offered (vendor-reported; product URL 404s) |
| Dermatology content available | Subject filter within MRCP Part 1/2 banks only |
| Analytics/feedback | Peer comparison, pass-likelihood indicator, difficulty filter (vendor-reported) |
| "Adaptive" element | High Impact Questions ranking (vendor-described; verify in-product) |
| Access/price | Tiered subscriptions vary by product; verify current pricing on the product page |
| Blueprinting to SCE Dermatology | None; MRCP dermatology is not the SCE Dermatology blueprint |
The SCE Dermatology exam: the official format and blueprint
The SCE is delivered by the Federation of Royal Colleges of Physicians (MRCP(UK)) in a single generic structure. You sit two papers on one day—Paper 1 in the morning, Paper 2 in the afternoon, with a break between—each three hours long and each containing 100 best-of-five questions, for 200 questions in total. Delivery is computer-based at a test centre, one mark per correct answer, with no negative marking. What changes between specialties is not the structure but the blueprint.
The published SCE Dermatology blueprint distributes those 200 questions approximately as follows (Federation blueprint; indicative counts, "the actual number may vary"):
| Blueprint domain | Approx. questions |
|---|---|
| General dermatology & dermatology in primary health care | 48 |
| Paediatric and genetics | 30 |
| Skin oncology | 18 |
| Skin biology & research | 14 |
| Cutaneous allergy | 10 |
| Dermatopathology | 10 |
| Dressings & wound care | 10 |
| Formulation & systemic therapy | 10 |
| Genito-urinary disorders and oral medicine | 10 |
| Infectious disease | 10 |
| Skin surgery and cosmetic dermatology | 10 |
| Photodermatology | 8 |
| Dermoscopy | 4 |
| Psychodermatology | 4 |
| Skin of colour | 4 |
Distinguish official requirements from third-party claims cleanly: the Federation sets the format and the blueprint. Any vendor's "SCE-style" label is a claim about alignment, not an official endorsement, and BMJ OnExamination makes no dermatology-alignment claim because it has no dermatology product to align.
Define every metric before you trust it
Even without a dermatology bank, the analytics-reading skills transfer to whatever specialty bank you do buy, so define each metric precisely. First-attempt accuracy is your percentage correct on items you have never seen; it is the only figure that behaves like an exam. Repeat accuracy is your percentage on items you have already attempted, and it drifts upward through recognition rather than reasoning. Percentile or peer benchmark places you against other users of the same product, a population that is neither the SCE cohort nor a fixed reference group. A pass-likelihood indicator—BMJ's "how likely you are to pass"—is a low-resolution readout built on self-selected practice, not a calibrated pass prediction. Coverage is the proportion of the bank you have attempted, which says nothing about the proportion of the blueprint you have mastered. Difficulty is usually a cohort statistic (how often others answered correctly), not an intrinsic property. Time per item is the most honest number on the dashboard, because it is hard to game.
Selection bias: why the home-screen average lies
The number a revision platform shows you is almost never comparable to your real exam performance, for a structural reason. When you choose topics, redo flagged items, practise untimed with explanations one click away, and let an algorithmic feed such as High Impact Questions steer you toward what it deems worth revising, you are not sampling the blueprint—you are sampling your own attention. Weak areas can be over-sampled (good for learning, bad for measurement) and comfortable areas under-tested. The resulting percentage rises without your readiness rising. This is exactly the failure mode described in why your Q-bank percentage is not your exam score: the denominator is curated, so the ratio is not a grade.
Blueprint audit: attempted distribution versus official weighting
Do not trust the average on the home screen; audit the distribution behind it. Export or tally your attempts by domain and lay them against the SCE Dermatology blueprint above. The recurring pattern is over-practice of high-volume, comfortable areas (general dermatology, skin oncology) and systematic under-practice of the low-count domains that still appear every diet—dermoscopy, psychodermatology, skin of colour, photodermatology. Because BMJ OnExamination cannot supply blueprinted dermatology coverage at all, this audit is precisely where it fails a dermatology candidate: you cannot build a blueprint-coverage matrix from questions that do not exist on the platform. The method itself is set out in the completion-is-not-coverage blueprint-matrix guide.
The readiness test: what a credible signal requires
A dashboard number is only a readiness signal when five conditions hold at once: the items are unseen (first attempt, not reviewed), the block is timed at exam pace (roughly 1.8 minutes per best-of-five item), the content is mixed across the whole blueprint rather than a single revised topic, you work with no assistance (no open explanations, no peeking), and the sample is large enough to be stable—treat a single 20-item run as noise and prefer blocks of 100 or more. Any figure produced outside those five conditions is a study metric, not a readiness metric. BMJ's mock tests satisfy the timed and mixed conditions for the exams it covers, but not for dermatology.
Override rules: force what the feed under-samples
When you do assemble a dermatology revision stack, override any algorithmic feed on a fixed schedule. Force low-volume domains (dermoscopy, photodermatology, psychodermatology, skin of colour) into every week even when a High-Impact-style ranking keeps surfacing common inflammatory dermatoses. Force image-dependent items—clinical morphology, dermoscopic patterns, dermatopathology slides—because these are the SCE's signature and the part a text-only feed quietly avoids. Force formulation and systemic therapy, where the medicines detail must come from the SmPC/eMC and current NICE or specialty-society guidance rather than half-remembered ward practice. The feed optimises for engagement; the exam samples the whole curriculum.
Worked example: turning a dashboard into next week's quotas
Suppose a trainee shows an 82% overall average, but the breakdown reads: 240 attempts in general dermatology at 88%, 30 in skin oncology at 79%, 8 in dermoscopy at 50%, 0 in photodermatology, 0 in skin of colour, and a mean 55 seconds per item (well under exam pace). The 82% is meaningless as a readiness signal—it is an average over a self-selected, untimed, unbalanced sample. Translate it into quotas instead of a pass prediction:
| Signal | Reading | Next week's action |
|---|---|---|
| 88% general dermatology, high volume | Over-sampled comfort zone | Cap at 20 timed unseen items |
| 50% dermoscopy, tiny volume | Genuine weakness, under-tested | 40 items, spaced across the week |
| 0 photodermatology / skin of colour | Blind spot | 25 items each, unseen |
| 55s per item | Pace inflated by untimed practice | Move all blocks to timed mode |
No pass percentage is generated, because none is defensible from this data.
Seven-day plan: one job for the bank, one for iatroX
Because BMJ OnExamination has no dermatology bank, the realistic version of the busy-trainee week uses a specialty SCE Dermatology bank for blueprinted coverage and iatroX for unseen, cross-specialty transfer measurement. iatroX is not a dermatology-specific SCE bank; it is the general UK/MRCP-level knowledge and unseen-MCQ measurement layer that sits alongside a specialty bank—useful for the general-medicine and prescribing knowledge that underpins every SCE, and for calibrating readiness on questions you have never seen.
| Day | Specialty bank (blueprinted coverage) | iatroX (unseen measurement) |
|---|---|---|
| Mon | 40 items: dermoscopy + photodermatology | — |
| Tue | Review errors; make retrieval notes | 20 unseen mixed items, timed |
| Wed | 40 items: dermatopathology + skin oncology | — |
| Thu | 40 items: paediatric & genetics | 20 unseen mixed items, timed |
| Fri | 40 items: cutaneous allergy + GU/oral | — |
| Sat | 100-item timed mixed mock | — |
| Sun | Spaced re-test of the week's misses | 30 unseen mixed items, timed |
This keeps the two tools from duplicating each other: one builds and blueprints coverage, the other measures transfer on genuinely new items, in line with the two-Q-bank rule.
Three mistakes this audit is designed to stop
First, buying a subscription for a bank that does not cover your exam because the brand is familiar—BMJ OnExamination is a strong MRCP resource, which is not the same as an SCE Dermatology resource. Second, reading a pass-likelihood indicator as a pass prediction; it is a coarse signal on curated data. Third, letting an algorithmic feed define your coverage, so that image-heavy, low-count domains never surface and your average climbs while your blind spots stay intact.
Decision checklist: continue, supplement, switch or stop
Continue with BMJ OnExamination only if your primary target is one of the specialties it actually covers, or if you are still consolidating MRCP-level general medicine. Supplement—for a dermatology candidate this is really "acquire"—with a dedicated SCE Dermatology bank that is blueprinted to the 15 domains above, plus iatroX for unseen measurement. Switch your dermatology coverage entirely to a specialty bank, because BMJ OnExamination cannot fill the blueprint. Stop using any tool when its first-attempt, timed, mixed accuracy plateaus and your errors are careless rather than knowledge gaps—at that point you need exam-condition mocks, not more questions. Base every branch on a measurable gap, never on novelty or sunk cost.
Bottom line
BMJ OnExamination is a capable analytics platform attached, for this exam, to content it does not have. For SCE Dermatology the responsible recommendation is to treat its dermatology offering as absent, build coverage on a specialty bank blueprinted to the Federation's 15 domains, and use iatroX as the unseen cross-specialty measurement and spaced-retrieval layer that tells you whether your knowledge transfers. The analytics-reading discipline is worth keeping; apply it to a bank that can actually be blueprinted.
FAQ
Is BMJ OnExamination enough for SCE Dermatology on its own? No, and not because it is weak but because, as of 20 July 2026, it does not publish an SCE Dermatology bank at all (vendor-reported). Its dermatology questions exist only as a subject filter inside its MRCP Part 1/2 products, which are not blueprinted to the SCE Dermatology curriculum, so it cannot on its own cover an exam it does not target.
Which SCE Dermatology component does BMJ OnExamination not reproduce well? The image-dependent core—clinical morphology, dermoscopy and dermatopathology—together with the low-count but reliably examined domains such as photodermatology, skin of colour and psychodermatology. A general MRCP subject filter will not surface these at SCE depth, which is exactly where a candidate needs blueprinted volume.
How many BMJ OnExamination questions should I complete per day for SCE Dermatology? The honest answer is that daily BMJ OnExamination dermatology volume is not a useful target here, because the platform has no SCE Dermatology bank; a defensible day is 40 blueprinted items on a specialty bank plus one short timed unseen block for measurement, adjusted to the domains your coverage audit flags.
When should I stop using BMJ OnExamination and move to mixed mocks? For dermatology you would move to a specialty bank immediately and to full mixed mocks once your first-attempt, timed, mixed accuracy on a blueprinted bank has stabilised and your remaining errors are pace or carelessness rather than gaps; a pass-likelihood indicator is not the trigger.
How should I combine BMJ OnExamination with iatroX without duplicating practice? Keep BMJ OnExamination for MRCP-level general medicine if you still need it, use a dedicated SCE Dermatology bank for blueprinted coverage, and reserve iatroX for unseen, timed, mixed blocks that measure transfer—so each tool does one job and no item is practised twice across platforms.
Editorial notes and references
Written by Dr Kolawole Tytler, NHS GP and founder of iatroX. Last checked 20 July 2026. Vendor figures (product ranges, feature descriptions, pricing) are vendor-reported and change without notice; verify the current position on the relevant product page before you buy. Disclosure: iatroX operates a competing UK question bank and clinical-knowledge platform; here its role is confined to the jobs BMJ OnExamination does not claim for this exam—cross-specialty knowledge and unseen-MCQ measurement—and iatroX is not a specialty-specific SCE Dermatology bank. Corrections are welcome via the feedback route on iatrox.com. References: Federation of Royal Colleges of Physicians (MRCP(UK)) SCE format and SCE Dermatology blueprint; BMJ OnExamination product and features pages (onexamination.com); and the iatroX framework pieces linked above on Q-bank percentage and blueprint-coverage matrices. Compare tools on the iatroX comparison hub.
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