Disentangling eating disorder diagnostic schemes. Commentary on Walsh et al., "A systematic review comparing atypical anorexia nervosa and anorexia nervosa".

This commentary discusses the systematic review by Walsh et al. that has found that people with atypical anorexia nervosa have similar symptoms and severity as have people with anorexia nervosa. In this paper, the discussion is broadened to other eating disorders diagnoses and the problem of overlap and crossover between syndromes that impacts adversely on the need for diagnoses to be distinct both at assessment but also over time. It is argued that the derivation of eating disorder diagnostic criteria has also been vulnerable to erroneous assumptions and biased observations. Whether atypical anorexia nervosa becomes a standalone diagnosis or is joined with an expanded anorexia nervosa, future delineations should be based on empirical research including neuroscience.