Since my connection with the Howard University College of Medicine, that is, during thirty-three years, I have made a record of every Negro patient observed with dermatologic disease or syphilis.
One of the most striking observations of this study has been the paucity of early syphilitic infection with extragenital chancres. All told, there have been seen 600 patients with chancres and 3,100 with early secondary lesions; each of the latter was investigated for the site of the initial lesion. Only 19 extragenital chancres were found. Of these, 12 were situated on the lips, 2 on the tonsils, 1 on the tongue, 1 on the breast, 1 on the finger and 2 in the groin. In addition, there was 1 on the base of the penis, which can hardly be classified as extragenital. This gives the percentage of extragenital chancres in this series of Negroes as 0.51. Two other
HAZEN HH. EXTRAGENITAL SYPHILITIC INFECTION IN NEGROES. Arch Derm Syphilol. 1945;52(2):114. doi:10.1001/archderm.1945.01510260044009