Which disease, occurring only in females, is characterized by normal development until six to eighteen months of age followed by a quick deterioration of mental abilities?

Which disease, occurring only in females, is characterized by normal development until six to eighteen months of age followed by a quick deterioration of mental abilities?

• A. Tay Sachs disease
• B. Rett's syndrome
• C. Rasmussen's encephalitis
• D. Lennox Gastaut syndrome

Answer: (B)

Rett's syndrome is indeed the correct answer as it is a neurodevelopmental disorder that primarily affects females. It typically presents with normal growth and development during the first six to eighteen months of life, after which there is a noticeable regression in cognitive and motor skills. This deterioration is often marked by the loss of purposeful hand skills, the development of repetitive hand movements such as hand-wringing, and significant challenges with communication and social interactions. The unique gender-specific occurrence of Rett's syndrome, as well as its distinct developmental trajectory, clearly sets it apart from the other conditions listed. Conditions like Tay Sachs disease, while also involving cognitive decline, are not exclusive to females and typically present with different clinical features and timelines. Similarly, Rasmussen's encephalitis and Lennox-Gastaut syndrome involve seizures and cognitive impairment but do not specifically follow the developmental pattern characteristic of Rett's syndrome or occur exclusively in females.

Rett's syndrome is indeed the correct answer as it is a neurodevelopmental disorder that primarily affects females. It typically presents with normal growth and development during the first six to eighteen months of life, after which there is a noticeable regression in cognitive and motor skills. This deterioration is often marked by the loss of purposeful hand skills, the development of repetitive hand movements such as hand-wringing, and significant challenges with communication and social interactions.

The unique gender-specific occurrence of Rett's syndrome, as well as its distinct developmental trajectory, clearly sets it apart from the other conditions listed. Conditions like Tay Sachs disease, while also involving cognitive decline, are not exclusive to females and typically present with different clinical features and timelines. Similarly, Rasmussen's encephalitis and Lennox-Gastaut syndrome involve seizures and cognitive impairment but do not specifically follow the developmental pattern characteristic of Rett's syndrome or occur exclusively in females.