F03 vs F04
F04 — Organic amnesic syndrome
Distinguish a genuine but unspecified dementia (broad decline, subtype unclear) from an isolated amnesic syndrome (memory alone affected, other cognition preserved).
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Show overlap — what both share
Both involve significant memory impairment with clear consciousness, and both can be reached when information is incomplete — but for different reasons.
Show decisive evidence
- F03 requires that general dementia criteria — decline across multiple cognitive domains — are met; the uncertainty is only about which specific subtype (F00/F01/F02) applies.
- F04 requires that memory is disproportionately and specifically affected while other cognitive domains are actually confirmed to be relatively intact — a narrower, not merely 'unspecified', picture.
- F04's uncertainty is not about breadth (that is established as narrow); F03's uncertainty is specifically about which broad-decline subtype fits.
What weakens F03: If other cognitive domains (language, praxis, executive function) are formally tested and found intact, with memory disproportionately affected, this weakens F03 and favours F04 instead.
Show duration / course
F03: as for general dementia — sustained, evident over months. F04: can follow an acute injury (rapid onset) or a chronic deficiency state, and does not require the general dementia course pattern.
Show exclusions / context
Do not classify a case as F04 simply because detailed cognitive testing has not yet been done; F04 requires that other domains are actually confirmed intact, not merely unassessed.
Show information still needed
Whether formal assessment has actually confirmed other cognitive domains are intact (favouring F04) or has confirmed broader multi-domain decline with unclear aetiology (favouring F03).
Show the common trap
Treating any case with incomplete information as automatically F03, without checking whether the actual pattern of impairment is narrow (pointing to F04) or broad (pointing to F03).
Mini challenge — practise this distinction
Apply the discriminating evidence above to a fresh case before checking the full feedback.