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Report of Five Cases, Review of All Known XYY Subjects With Severe Acne, and Discussion of XYY Cytodiagnosis

John J. Voorhees, MD; James W. Wilkins, Jr., MD; Emmet Hayes, MA; E. Richard Harrell, MD

Arch Dermatol. 1972;105(6):913-919.

Abstract
The question of causality vs concomitance of nodulocystic acne (NCA) and XYY genotype is examined. The results of our previous pilot study on the frequency of the XYY genotype in prisoners (four in 100) and outpatients (two in 100) with NCA are discussed in relation to the 44% (seven in 16) frequency of NCA in three series of XYY subjects in whom the presence of NCA was sought and recorded. The 2% XYY frequency in NCA outpatients (11 times the 0.18% XYY incidence in neonatal males), 4% XYY frequency in prisoners with and none in prisoners without NCA, and 44% frequency of moderate to severe acne in known XYY's (14 times the 3% NCA incidence in XY boys) suggests an association between NCA and the XYY genotype. The XYY subjects appear to have NCA commonly, whereas any one NCA patient will only very rarely have an XYY genotype.

Author Affiliations
Ann Arbor, Mich

From the Department of Dermatology, University of Michigan Medical School, Ann Arbor. Dr. Voorhees is a Carl Herzog fellow of the American Dermatological Association.

Footnotes
Accepted for publication June 15, 1971.

Read in part before the third conference on the Clinical Delineation of Birth Defects, the Johns Hopkins Hospital, Baltimore, June 19, 1970; and in part before the 29th annual meeting of the American Academy of Dermatology, Chicago, Dec 5, 1970.

Reprint requests to Department of Dermatology, R6558 Kresge Medical Research Bldg, University of Michigan Medical School, Ann Arbor, Mich 48104 (Dr. Voorhees).

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