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- A51.1 Primary anal syphilis
- A51.2 Primary syphilis of other sites
- A51.3 Secondary syphilis of skin and mucous membranes
- A51.31 Condyloma latum
- A51.32 Syphilitic alopecia
- A51.39 Other secondary syphilis of skin
- Syphilitic leukoderma
- Syphilitic mucous patch
- Excludes1: late syphilitic leukoderma (A52.79)
- A51.4 Other secondary syphilis
- A51.41 Secondary syphilitic meningitis
- A51.42 Secondary syphilitic female pelvic disease
- A51.43 Secondary syphilitic oculopathy
- Secondary syphilitic chorioretinitis
- Secondary syphilitic iridocyclitis, iritis
- Secondary syphilitic uveitis
- A51.44 Secondary syphilitic nephritis
- A51.45 Secondary syphilitic hepatitis
- A51.46 Secondary syphilitic osteopathy
- A51.49 Other secondary syphilitic conditions
- Secondary syphilitic lymphadenopathy
- Secondary syphilitic myositis
- A51.5 Early syphilis, latent
- Syphilis (acquired) without clinical manifestations, with positive serological reaction and negative spinal fluid test, less than two years after infection.
- A51.9 Early syphilis, unspecified
A52 Late syphilis
- A52.0 Cardiovascular and cerebrovascular syphilis
- A52.00 Cardiovascular syphilis, unspecified
- A52.01 Syphilitic aneurysm of aorta
- A52.02 Syphilitic aortitis
- A52.03 Syphilitic endocarditis
- Syphilitic aortic valve incompetence or stenosis
- Syphilitic mitral valve stenosis
- Syphilitic pulmonary valve regurgitation
- A52.04 Syphilitic cerebral arteritis
- A52.05 Other cerebrovascular syphilis
- Syphilitic cerebral aneurysm (ruptured) (non-ruptured)
- Syphilitic cerebral thrombosis
- A52.06 Other syphilitic heart involvement
- Syphilitic coronary artery disease
- Syphilitic myocarditis
- Syphilitic pericarditis
- A52.09 Other cardiovascular syphilis
- A52.1 Symptomatic neurosyphilis