Background: The avoidant/restrictive spectrum of eating behaviour includes the avoidant/ restrictive of food intake disorder (ARFID), sometimes involving overlapping, crossing and turning with other eating disorders. Objective: A descriptive analysis of ARFID and other eating disorders is performed in relation to its epidemiological, etiopathogenic, clinical and therapeutic aspects. Illustrative clinical vignettes are included. Method: A review of specialised textbooks and the available literature in Medline/PubMed and SciELO on ARFID and other eating disorders was carried out. Results: ARFID, which in the DSM-5 acquires the category of a well-defined eating disorder, may be preceded by selective/picky eating. Patients are mainly young men with a long evolution of the disorder. Other eating disorders included in the avoidant/ restrictive range are: anorexia nervosa, food allergy and intolerance and orthorexia nervosa; the lately as a relatively recent syndromatic concept. It has been controversial whether orthorexia nervosa is a unique eating disorder, a consequence of its outcome or an obsessive-compulsive process. The historical background of an eating disorder is a significant predictive factor for orthorexia nervosa. All these disorders can produce different levels of malnutrition and interference in psychosocial performance. The therapeutic management requires a multidisciplinary team that includes physicians, psychotherapists, nutritionists, psychoeducation, cognitive-behavioural psychotherapy, nutritional counselling, and sometimes anti-serotonergic drug therapy. Conclusions: More evidence is needed in the research of these new phenotypes of eating disorders to determine their impact on demographic, nosological, clinical and therapeutic aspects.