35-year-old Raymond presents with a painless indurated ulcer on the penis with enlarged genital non-tender lymphnode. What is the diagnosis ?
**Core Concept**
The underlying clinical principle being tested is the diagnosis of a sexually transmitted infection (STI) based on its characteristic presentation. The **painless indurated ulcer** is a hallmark of certain STIs, and the presence of **enlarged genital lymph nodes** suggests a systemic response to infection.
**Why the Correct Answer is Right**
The correct diagnosis is likely **primary syphilis**, caused by the bacterium *Treponema pallidum*. The painless indurated ulcer, known as a **chancre**, is typically found at the site of initial infection and is accompanied by **regional lymphadenopathy**.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not typically present with a painless indurated ulcer.
**Option B:** Incorrect as it usually causes painful genital ulcers.
**Option C:** Incorrect because it is not commonly associated with this specific presentation.
**Option D:** Incorrect as it does not match the described clinical findings.
**Clinical Pearl / High-Yield Fact**
The presence of a painless indurated ulcer with regional lymphadenopathy is highly suggestive of **primary syphilis**.
**Correct Answer:** D. Primary Syphilis