Objectives. New evidence linking lack of circumcision with sexually tr
ansmitted human immunodeficiency virus revives concerns about circumci
sion and other sexually transmitted diseases. This study was undertake
n to assess the relationship between circumcision and syphilis, gonorr
hea, chlamydial infection, genital herpes, nongonococcal urethritis, a
nd exophytic genital warts. Methods. A cross-sectional study of 2776 h
eterosexual men attending a sexually transmitted disease clinic in 198
8 was used to investigate the relationship between circumcision and se
xually transmitted diseases. Subjects with specific sexually transmitt
ed diseases and those without such diseases were compared after adjust
ment for age, race, zip code of residence, other sexually transmitted
diseases, and number of sexual partners. Results. A positive relations
hip was observed between uncircumcised status and both syphilis and go
norrhea. A negative relationship was found between warts and lack of c
ircumcision. No apparent relationship was noted between uncircumcised
status and genital herpes, chlamydial infection, or nongonococcal uret
hritis. Conclusions. Uncircumcised men were more likely than circumcis
ed men to have syphilis and gonorrhea and were less likely to have vis
ible warts.