A B S T R A C T Spontaneous prostatic hyperplasia in the beagle appears to progress with age from a glandular to a cystic histological appearance. Prostatic hyperplasia can be induced in young beagles with intact testes by treatment for 4 mo with either dihydrotestosterone or 5a-androstane-3a,17,8-diol, alone, or with either of these steroids in combination with 17,3-estradiol.In contrast, the induction of prostatic hyperplasia in young castrated beagles, in which the gland had been allowed to involute for 1 mo, requires the administration of both 17,3-estradiol and either 5a-androstane-3a, 17,8-diol or dihydrotestosterone. Testosterone and 17,8-estradiol, either singly or in combination, did not produce the hyperplastic condition in intact or castrated beagles. The experimentally induced prostatic hyperplasia is identical in pathology to the glandular hyperplasia that occurs naturally in the aging dog with intact testes. However, cystic hyperplasia was not produced by any of the treatments tested in young animals.

Routine neonatal assignment of genetic males to female sex because of severe phallic inadequacy can result in unpredictable sexual identification. Clinical interventions in such children should be reexamined in the light of these findings.

The authors have indicated they have no financial relationships relevant to this article to disclose.A DVANCES in understanding of genetic control of sexual determination and differentiation, improvements in diagnostic testing and surgical genital repair, and the persistent controversies inherent to clinical management were all compelling factors that led to the organization of an international consensus conference. The goals were to acknowledge and discuss the more controversial issues in intersex management, provide management guidelines for intersex patients, and identify and prioritize questions that need additional investigation. This is a summary statement. NOMENCLATURE AND DEFINITIONSAdvances in molecular genetic causes of abnormal sexual development and heightened awareness of the ethical and patient-advocacy issues mandate reexamination of existing nomenclature for patients with intersex. 1 Terminology such as "pseudohermaphroditism" is controversial, potentially pejorative to patients, 2 and inherently confusing. Therefore, the term "disorders of sex development" (DSD) is proposed to indicate congenital conditions with atypical development of chromosomal, gonadal, or anatomic sex.Additional rationale for new classification is the need for modern categorization to integrate the modern molecular genetic aspects, to maximize precision when applying definitions and diagnostic labels, 3 and to meet the need for psychologically sensitive yet descriptive medical terminology. Nomenclature should be flexible enough to incorporate new information, robust enough to maintain a consistent framework, use descriptive terms, reflect genetic etiology, accommodate phenotypic variation spectrum, and be useful for clinicians, scientists, patients, and families. Hence, we propose a new classification (see "Consensus Statement on Management of Intersex Disorders" 4 in this month's issue of Pediatrics Electronic Edition).Three traditionally conceptualized domains of psychosexual development are gender identity (one's self-representation [ie, male or female]), gender role (sexually dimorphic behaviors within the general population, such as toy preferences, aggression, and spatial ability), and sexual orientation (direction[s] of erotic interest). Gender dissatisfaction denotes unhappiness with assigned sex and may www.pediatrics.org/cgi/

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