Homosexuality was redefined by the American Psychiatric Association in 1973 as a variation in sexual orientation rather than a mental illness, and recent research has greatly expanded knowledge about homosexuality, gay men, and lesbians. However, generally speaking, neither a nonpathological perspective nor this new information has been integrated into psychiatric residency curricula. This absence compromises the ability of residency programs to train residents to be broadly competent in dealing with issues related to these topics. Learning about homosexuality, gay men, and lesbians should be integrated into all psychiatric residencies, and a curriculum to serve as a basic model for this necessary professional training is proposed.EDITOR' FOREWORD: This article is one of six residency training curricula written for psychiatric educators by members of the American Psychiatric Association's (APA) minority and underrepresented component committees. Commissioned by the APA Assembly and reviewed by the APA's Council on National Affairs and Board of Trustees, these curricula are intended to represent collectively a state-of-the-art description of psychiatric training regarding the needs of individuals from minority and traditionally underrepresented populations within the United States. They may be seen as acompanion work to the growing body of clinically oriented volumes on the subject of the interaction of psychiatry, culture, and ethnicity. This article, written by Terry S. Stein, M.D., who has taken a lead role in coordinating and editing the work of all six APA-commissioned curricula, is the first of what we hope will be a series of articles to be published in Academic Psychiatry. J.F.B.