Anorexia nervosa (AN) is a syndrome characterized by three essential criteria. The first is a self-induced starvation, the second is a relentless drive for thinness or a morbid fear of fatness and the third is the presence of medical signs and symptoms resulting from starvation. The most common ages of onset of anorexia nervosa are the mid teens. It occurs 10 to 20 times more often in females than males and it seems to be more frequent in developed countries. In some patients concerns about weight reaches delusional proportions. This subpopulation of patients warrants further study since patients with more delusional beliefs may have a form of AN that is more refractory to treatment.

In this report a rare case of Anorexia nervosa is presented in which the patient is a 29 year old male with poor socioeconomic background from a developing country who subsequently experienced a distinct onset of delusional disorder. After four weeks delusional disorder and Anorexia Nervosa resolved due to treatment by atypical antipsychotics (Risperidone).