Secondary syphilis rash distribution includes which of the following?

• A. Diffuse maculopapular rash involving palms and soles
• B. Rash limited to trunk
• C. Vesicular rash on the face
• D. Pustular rash on limbs

Answer: (A)

Secondary syphilis typically presents with a diffuse maculopapular rash that characteristically involves the palms and soles. This palm-and-sole distribution is a classic clue that helps distinguish it from rashes that spare these areas. The rash is often nonpruritic and can be accompanied by other signs such as mucous patches, generalized lymphadenopathy, condyloma lata, and fever, appearing weeks to months after the initial chancre.

Rashes limited to the trunk are less characteristic of secondary syphilis and can be seen with many other conditions. Vesicular rashes on the face or pustular rashes on the limbs are more typical of other etiologies (such as varicella or dermatitis/infections) and do not best describe the common presentation of secondary syphilis. The hallmark distribution to include the palms and soles makes the first option the best answer.