A 2-year-old intellectually disabled child is having blue eyes, blonde hair and fair skin. He also has a peculiar body odour. What is the diagnosis?
**Core Concept:**
The question is asking about the diagnosis of a 2-year-old intellectually disabled child with specific physical characteristics and an unusual body odour. The diagnosis is based on the combination of these features.
**Why the Correct Answer is Right:**
The correct answer is **C. Klinefelter syndrome (47, XXY)**. This condition is a genetic disorder caused by the presence of an extra X chromosome in males. In this case, the child has blue eyes, blonde hair, and fair skin, which are features common in individuals with Klinefelter syndrome. An intellectually disabled child with these characteristics is more likely to have this genetic disorder.
**Why Each Wrong Option is Incorrect:**
A. **Turner syndrome (45, X):** This is another genetic disorder where a female has an incomplete or missing X chromosome. The physical characteristics of Turner syndrome are different from those of Klinefelter syndrome, making this option incorrect.
B. **Brotherly affection:** This is a non-medical term and not relevant to the diagnosis process.
D. **Hormonal imbalance:** While hormonal imbalance can contribute to some of the physical features, the correct diagnosis is based on the genetic cause, not just hormonal imbalance.
**Clinical Pearl:**
Klinefelter syndrome is a common genetic disorder in males, affecting approximately 1 in every 500-600 male births. Early diagnosis and intervention can lead to improved quality of life for the child and their family.
**Correct Answer:** C. Klinefelter syndrome (47, XXY)
**Explanation:**
The child exhibits the combination of blue eyes, blonde hair, and fair skin, which are common features in individuals with Klinefelter syndrome. Additionally, the intellectually disabled status aligns with the cognitive impairment often associated with the condition. It is essential for clinicians to consider Klinefelter syndrome in the differential diagnosis when evaluating a male child with intellectual disability and specific physical characteristics. Early diagnosis and management can have a significant impact on the child's quality of life, and it is crucial for healthcare professionals to recognize and differentiate this syndrome from other disorders with similar symptoms.