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Diagnostic appearance of abdominal roentgenogram in pica

Pica is an eating disorder that is manifested by craving oral ingestion of a given substance that is unusual in kind and/or quantity. 1 In the Diagnostic and Statistical Manual of Mental Disorders-III-R (DSM-III-R), pica is given the status of a distinct eating disorder, as is anorexia nervosa, bulimia nervosa and rumination disorder of infancy. However, in the Draft of International Classification of Diseases-10 (ICD-10), only anorexia nervosa and bulimia nervosa are listed under eating disorders. Pica in children and feeding disorders in childhood are incorporated with enuresis, encopresis and feeding, movement and speech disorders, in a ‘heterogenous group of disorders’. 2 The definitions of pica in both DSM-III-R and ICD-10 confine themselves to the persistent eating of non-nutritive substances. 2 The causes and risk factors of pica are not well established. 3 While there is evidence that physiologic, psychologic, and sociologic explanations can provide some understanding of pica, no explanation is likely to provide sufficient rationale for all behaviors associated with this condition. 1,4 Geophagia (clay eating) is the most frequently reported form of pica in the published literature. 1