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  • Title: Macroorchidism and fragile X in mentally retarded males. Clinical, cytogenetic, and some hormonal investigations in mentally retarded males, including two with the fragile site at Xq28, fra(X)(q28).
    Author: Nielsen KB, Tommerup N, Dyggve HV, Schou C.
    Journal: Hum Genet; 1982; 61(2):113-7. PubMed ID: 6215327.
    Abstract:
    One hundred and seventy eight males resident in an institution for the mentally retarded were screened clinically for the presence of macroorchidism, using the standard orchidometer. In this way 52 males with a testicular volume of 25 ml and over were found. Of these, 11 had pronounced macroorchidism (above 25 ml). All 52 males were examined cytogenetically for the fragile X. Two patients with pronounced macroorchidism showed this abnormality. Although the other nine patients with pronounced macroorchidism were reexamined with FUdR-addition to blood cultures, no further cases positive for the fragile X were found. Also, the thyroid function as well as the prolactin level in serum were investigated in all 52 males. No significant abnormalities were found. The high incidence of macroorchidism in mentally retarded males is underlined; however, it is suggested that the definition of macroorchidism should take into account several parameters.
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