A multidisciplinary American Academy of Dermatology workgroup, using GRADE methods, issued a Good Practice Statement on adults with presumed atopic dermatitis that remains refractory to optimised treatment. Its core advice is that treatment failure should prompt diagnostic reassessment, because misdiagnosis or a coexisting condition may explain the lack of response.
The authors are explicit about the evidence base: there are no direct studies of diagnostic workup strategies in refractory eczema, so the statement rests on indirect evidence and expert consensus. They also note that applicability depends on access to dermatology and allergy services.
The practical consequence is a change in the default response to failure. Escalating to a systemic agent or a biologic without reconsidering the diagnosis risks treating the wrong disease for longer and at greater cost. In Indian practice the common alternatives include steroid-modified tinea and scabies, both of which can look like eczema that has stopped responding.
- Before escalating, confirm adherence and that the topical treatment was actually adequate in potency and quantity
- Take skin scrapings for fungus where the rash has an active edge or has worsened on steroids
- Look for burrows and ask about itching in household contacts
- Consider patch testing for allergic contact dermatitis, including to the treatments being applied
- Biopsy adult-onset, atypical or persistent disease to exclude cutaneous T-cell lymphoma
Why it matters
Treatment failure in adult eczema is often a diagnostic problem rather than a need for a stronger drug.
Don't overread it
This is a consensus statement built on indirect evidence — it does not establish which tests change outcomes.
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