**Core Concept**
Spongiosis refers to the edema of the epidermis, particularly in the intercellular spaces between keratinocytes, leading to a sponge-like appearance under histopathological examination. This condition is often associated with various dermatological disorders and can be a hallmark of eczema or atopic dermatitis.

**Why the Correct Answer is Right**
Spongiosis occurs due to the disruption of the normal epidermal barrier function, allowing fluid to accumulate in the intercellular spaces. This is often a result of inflammation, which is a common feature in eczema and atopic dermatitis. The increased permeability of the epidermal junction and the release of cytokines and chemokines further contribute to the development of spongiosis.

**Why Each Wrong Option is Incorrect**
**Option A:** Psoriasis - While psoriasis is a chronic inflammatory skin disorder, spongiosis is not a characteristic feature of this condition. The primary histopathological findings in psoriasis include parakeratosis and Munro's microabscesses.
**Option B:** Seborrheic dermatitis - This condition is characterized by a distinctive scaly and oily appearance, but spongiosis is not a typical finding. The primary histopathological features of seborrheic dermatitis include a mixed inflammatory infiltrate and the presence of a hyphae in the affected area.
**Option C:** Lichen planus - Lichen planus is a chronic inflammatory skin disorder characterized by a distinctive "lacy" appearance. While it does involve the dermal-epidermal junction, spongiosis is not a primary feature of this condition. The primary histopathological findings in lichen planus include basal cell degeneration and a band-like inflammatory infiltrate.

**Clinical Pearl / High-Yield Fact**
Spongiosis is often seen in conditions where the epidermal barrier function is compromised, leading to increased permeability and fluid accumulation in the intercellular spaces. Recognizing spongiosis can help in the differential diagnosis of various dermatological disorders, particularly eczema and atopic dermatitis.

**Correct Answer:** C.