A patient presents with freckling in axilla and inguinal area since childhood; which of the following is not an ophthalmological examination finding in such a patient?
**Core Concept:** Vitiligo is a chronic autoimmune disorder characterized by depigmentation of the skin due to destruction of melanocytes. In dermatological examination, patients with vitiligo often exhibit hyperpigmentation (darkening) in sun-exposed areas and hypopigmentation (lightening) in non-sun-exposed areas.
**Why the Correct Answer is Right:** In the context of the given question, vitiligo is the most likely diagnosis because the patient presents with freckling in axilla and inguinal area since childhood, which is a typical dermatological manifestation of this condition.
**Why Each Wrong Option is Incorrect:**
A. **Option A (Hypopigmentation):** Hypopigmentation refers to reduced pigmentation, which is the opposite of the observed hyperpigmentation in vitiligo. In this context, hypopigmentation would be expected in sun-exposed areas, not non-sun-exposed areas like axilla and inguinal area.
B. **Option B (Hypopigmentation):** Same explanation as Option A applies here.
C. **Option C (Hypopigmentation):** Hypopigmentation is incorrect as mentioned above.
D. **Option D (Hypopigmentation):** Hypopigmentation would not explain the observed freckling in axilla and inguinal area.
**Clinical Pearl:** Vitiligo is a common autoimmune disorder affecting approximately 1-2% of the population worldwide. It is often associated with other autoimmune conditions and can have significant psychosocial impact on the patient.
**Correct Answer:** D. **Option D (Hypopigmentation):** Hypopigmentation would not explain the observed freckling in axilla and inguinal area. In this context, hypopigmentation would be expected in sun-exposed areas, not non-sun-exposed areas like axilla and inguinal area.