Neurological Abnormalities in XYY Males

Abstract

THE report by Jacobs et al.¹ on seven XYY males found among patients in an institution providing special security conditions of confinement for patients with violent or otherwise dangerous propensities was particularly surprising because only a few cases of this type of aneuploidy had been described previously. Price et al.² examined these seven XYY males and two others from the same institution, and found that none had physical abnormalities ; they noted, however, that six of the nine were 6 feet or more tall. In fifty males 6 feet or more tall who were classified as “mentally subnormal” and “antisocial”, Casey et al.³ found twelve XYY males; they discovered another four among fifty tall, “mentally ill”, antisocial patients, and two more among twenty-four tall criminals. Results of physical examination of these patients were not given. Telfer et al.⁴, who have not yet described in detail the physical findings in the five XYY males they have found, stressed that four of these patients had facial acne.