**Core Concept**
Munro's microabscesses are a histopathological feature seen in psoriasis, a chronic inflammatory skin condition characterized by abnormal keratinocyte proliferation and differentiation. They are small collections of neutrophils in the epidermis, playing a crucial role in the pathogenesis of psoriasis.

**Why the Correct Answer is Right**
Munro's microabscesses are formed due to the abnormal migration of neutrophils into the epidermis, which is a result of the interaction between activated keratinocytes and neutrophils. This interaction triggers the release of various cytokines and chemokines, leading to the recruitment of more neutrophils and the formation of microabscesses. The presence of Munro's microabscesses is a characteristic feature of psoriasis and is often seen in the involved skin areas.

**Why Each Wrong Option is Incorrect**
**Option A:** Not directly related to Munro's microabscesses, as they are not typically seen in this condition.
**Option B:** While eczema can have a similar appearance to psoriasis, Munro's microabscesses are not a characteristic feature of eczema.
**Option C:** Lichen planus is a different skin condition that can have a similar appearance to psoriasis, but Munro's microabscesses are not typically seen in lichen planus.

**Clinical Pearl / High-Yield Fact**
Munro's microabscesses are an important diagnostic feature of psoriasis, and their presence can help differentiate psoriasis from other skin conditions.

**Correct Answer: D. Psoriasis**