Which of the following dermatological condition is associated with mutation in K1 (Keratin 1) and K10 (Keratin 10) genes?
## **Core Concept**
The question tests knowledge of genetic mutations associated with specific dermatological conditions, focusing on keratin genes. Keratins are structural proteins crucial for skin integrity, and mutations in keratin genes can lead to various skin disorders. Specifically, this question addresses mutations in K1 (Keratin 1) and K10 (Keratin 10) genes.
## **Why the Correct Answer is Right**
Epidermolytic hyperkeratosis, also known as bullous congenital ichthyosiform erythroderma, is associated with mutations in the K1 and K10 genes. These genes encode keratins that are predominantly expressed in suprabasal epidermal cells. Mutations in these genes lead to abnormal keratin function, causing skin thickening, scaling, and blistering. This condition is characterized by hyperkeratosis, erythroderma, and often blistering in infancy.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not correspond to the condition associated with K1 and K10 gene mutations.
- **Option B:** Similarly, this option does not match the condition related to the specified keratin gene mutations.
- **Option D:** This option is also incorrect as it refers to a different condition not associated with mutations in K1 and K10 genes.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that epidermolytic hyperkeratosis is inherited in an autosomal dominant pattern, and genetic counseling is crucial for affected families. This condition often presents at birth or in early infancy with erythroderma and blistering, later evolving into thickened skin.
## **Correct Answer:** C. Epidermolytic hyperkeratosis.