**Question:** True about incontinenta pigmenti include the following except –

A. Pigmentation changes are predominantly found in sun-exposed areas
B. The condition is predominantly seen in females
C. Incontinenta pigmenti is a clinical term for linear epidermal naevus
D. The condition is associated with systemic symptoms or complications

**Correct Answer:** C. Incontinenta pigmenti is a clinical term for linear epidermal naevus

**Core Concept:** Incontinenta pigmenti, also known as linear epidermal naevus, is a benign hamartoma affecting the skin. It is characterized by linear pigmentation changes along the Blaschko lines (a pattern of skin appendages and pigment cells development during embryogenesis). The condition is typically associated with abnormalities in the dermal papilla cells, which leads to the formation of linear melanocytic proliferation.

**Why the Correct Answer is Right:** Incontinenta pigmenti is a specific clinical term for a benign condition known as linear epidermal naevus. It is characterized by linear pigmentation changes along the Blaschko lines, and is usually caused by abnormalities in dermal papilla cells resulting in melanocytic proliferation.

**Why Each Wrong Option is Incorrect:**

A. Pigmentation changes are predominantly found in sun-exposed areas: This is incorrect because incontinenta pigmenti affects the skin along Blaschko lines, regardless of sun exposure.

B. The condition is predominantly seen in females: Incontinenta pigmenti affects both genders equally, so this statement is incorrect.

D. The condition is associated with systemic symptoms or complications: Incontinenta pigmenti is typically a benign condition with minimal systemic effects, making this statement incorrect.

**Clinical Pearl:** Linear epidermal naevus should not be confused with other pigmentary disorders like nevus of Ota or nevus of Ito, which are also caused by melanocytic proliferation but exhibit different patterns of involvement and may be associated with systemic symptoms.