The hard chancre is seen in:
The hard chancre /hunterian chancre/primary chancre in syphilis is a single, painless, indurated ulcer. NOTE: Other chancres in syphilis: Condom chancre- at root of penis, felon chancre - extragenital chancre in finger, chancre redux- lesion similar to primary at the site of chancre during relapse, Pseudochancre redux- gumma at the site of primary. Other chancres in venereology: Soft chancre- chancroid, mixed chancre- both hard and soft occuring simultaneously in an individual. Ref: Sexually transmitted infections, Bhushan Kumar, 2nd edition, page 433-435.
Syphilis
Chancroid
LGV
Granuloma inguinale