The authors present an account on monozygotic twins where in one girl an androgen-active adenoma of the adrenal cortex during early puberty led to the development of the Morphogram of Body Build (Case-report of throughout the period of investigation intact from the hormonal aspect. Four years after resection of the tumour endocrine and anthropometric characteristics of the two sisters were evaluated: the hormonal status of both is normal, the somatic differences are manifested by a different final height, biacromial width and chest circumference. The results are conceived as a precedent for evaluation of risks associated with administration of anabolic steroids in children.