Tinea faciei is
**Core Concept**
Tinea faciei is a superficial fungal infection of the face caused by dermatophytes, which invade and digest keratin in the skin, leading to characteristic skin lesions.
**Why the Correct Answer is Right**
Tinea faciei is characterized by well-defined, round, or oval patches of scaling, erythema, and sometimes vesicles on the face, particularly on the cheeks, forehead, or chin. The infection is usually caused by Trichophyton or Microsporum species, which are common dermatophytes that infect the skin. The lesions in tinea faciei typically follow the lines of follicles or skin appendages, and the infection can be diagnosed clinically or with a potassium hydroxide (KOH) preparation, showing hyphae or spores.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the correct location for tinea faciei, which is limited to the face. Tinea corporis, on the other hand, affects the trunk and limbs.
**Option B:** This option is incorrect because it describes tinea capitis, which is a fungal infection of the scalp, particularly in children.
**Option C:** This option is incorrect because it refers to a bacterial infection, not a fungal one. Impetigo is a common bacterial infection of the skin, characterized by honey-colored crusts and well-demarcated borders.
**Clinical Pearl / High-Yield Fact**
Tinea faciei is often mistaken for other facial dermatoses, such as seborrheic dermatitis or rosacea. A potassium hydroxide (KOH) preparation is a simple and effective method for diagnosing tinea faciei, as it helps to visualize the fungal elements.
**Correct Answer: D. Tinea faciei**