Cicatrisial alopecia is seen in:
**Core Concept**
Cicatrisial alopecia refers to a type of scarring hair loss caused by damage to the hair follicles, leading to permanent loss of hair. This condition is characterized by the formation of scar tissue, which replaces the hair follicles, resulting in permanent hair loss.
**Why the Correct Answer is Right**
Cicatrisial alopecia is often seen in conditions that cause inflammation and scarring, such as lichen planopilaris, discoid lupus erythematosus, and folliculitis decalvans. These conditions lead to the destruction of hair follicles, resulting in scarring and permanent hair loss. The inflammation and scarring process cause the formation of collagen, which replaces the hair follicles, leading to permanent hair loss.
**Why Each Wrong Option is Incorrect**
**Option A:** Telogen effluvium is a non-scarring hair loss condition characterized by excessive hair shedding due to hormonal changes, nutritional deficiencies, or stress. It does not cause permanent hair loss and is not a type of cicatrisial alopecia.
**Option B:** Alopecia areata is an autoimmune disease that causes non-scarring hair loss, characterized by the formation of antibodies against the hair follicles. While it can cause significant hair loss, it is not a type of cicatrisial alopecia.
**Option C:** Traction alopecia is a non-scarring hair loss condition caused by mechanical stress on the hair follicles, often due to hairstyles or tight hairstyles. It does not cause scarring or permanent hair loss.
**Clinical Pearl / High-Yield Fact**
Cicatrisial alopecia can be challenging to diagnose, as it may resemble other non-scarring hair loss conditions. A thorough medical history, physical examination, and biopsy may be necessary to confirm the diagnosis.
**Correct Answer:** D. Discoid lupus erythematosus is a classic example of a condition that can cause cicatrisial alopecia, characterized by scarring hair loss and the formation of characteristic skin lesions.