An American Academy of Dermatology multidisciplinary workgroup used GRADE methodology to address adults with presumed atopic dermatitis who remain uncontrolled despite optimised treatment. Direct trial evidence on how to investigate such patients does not exist, so the group issued a good practice statement based on indirect evidence and consensus.
The statement's core is simple: when presumed adult eczema is refractory to optimised treatment, misdiagnosis or a coexisting condition may be the reason, and the diagnosis should be reassessed. In practice the usual differentials are allergic contact dermatitis, cutaneous T-cell lymphoma, scabies, psoriasis and drug eruptions, and the usual tools are patch testing, biopsy and a careful history.
This matters now because systemic biologics and JAK inhibitors make it easy to escalate. Escalating treatment for the wrong diagnosis exposes patients to cost and risk and can delay recognition of lymphoma. The workgroup notes that applicability depends on access to dermatology and allergy services.
- Confirm adherence, technique and adequate topical quantities before calling eczema refractory
- Patch test adults with refractory eczema, especially new adult-onset or atypically distributed disease
- Biopsy when the picture is atypical, and repeat if suspicion of cutaneous T-cell lymphoma persists
- Consider scabies, psoriasis and drug eruptions in the differential
- Reassess the diagnosis before starting or switching a biologic or JAK inhibitor
Why it matters
Easy access to biologics makes it tempting to escalate before checking the diagnosis.
Don't overread it
This is a good practice statement from expert consensus, not trial evidence on diagnostic strategy.
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