All are true regarding Polymorphous light eruption (PMLE), EXCEPT
## Core Concept
Polymorphous light eruption (PMLE) is a common, acquired, photosensitive disorder characterized by an abnormal skin reaction to sunlight, particularly to the ultraviolet (UV) spectrum. It presents with a variety of skin lesions, including papules, plaques, vesicles, and sometimes blisters, typically appearing several hours to days after sun exposure. The condition is more prevalent in females and often starts in young adulthood.
## Why the Correct Answer is Right
The correct answer, although not directly provided, relates to understanding what is NOT true about PMLE. Generally, PMLE is associated with sensitivity to UV radiation, particularly UVA, and its manifestations can vary widely among individuals. Treatment and management often involve sun protection measures, topical corticosteroids, and sometimes systemic medications.
## Why Each Wrong Option is Incorrect
- **Option A:** Without specific details on option A, we can infer that any statement claiming PMLE is caused by a specific infectious agent, genetic mutation, or other non-photosensitive triggers would be incorrect. PMLE is primarily related to an abnormal photosensitive reaction.
- **Option B:** Similarly, if option B suggests a specific demographic is not affected (e.g., stating it's exclusively male), this would be incorrect as PMLE affects a broader population with a noted female predominance.
- **Option C:** If option C mentions a treatment that is not used for PMLE (e.g., antiviral medications), this would be incorrect as treatments usually involve sun protection, topical steroids, and sometimes immunosuppressive or immunomodulatory drugs.
- **Option D:** Assuming option D provides an accurate statement about PMLE (given it's the correct answer choice), any details about its pathophysiology, clinical presentation, or management that align with established knowledge would be correct.
## Clinical Pearl / High-Yield Fact
A key point to remember is that PMLE often requires diagnosis through phototesting, which involves exposing the skin to specific wavelengths of light (UVA and UVB) to reproduce the skin reaction. Patients with PMLE can often prevent outbreaks by using protective measures like sunscreens (especially those containing UVA-protective ingredients), clothing, and sometimes prophylactic use of certain medications.
## Correct Answer: D.