A baby girl presents with bilateral inguinal masses, thought to be hernias but are found to be testes in the inguinal canals.Which karyoty pe would you expect to find in the child – (AIIMS Nov 04)
**Core Concept**
The question is testing the understanding of the embryological development of the genital system, specifically the presence of testes in the inguinal canals, which is a characteristic feature of **Cryptorchidism**. This condition is associated with an underlying chromosomal abnormality.
**Why the Correct Answer is Right**
The presence of testes in the inguinal canals suggests an abnormal descent of the testes during embryological development. The correct karyotype to expect in this child would be **47,XXY**, also known as **Klinefelter syndrome**. This condition occurs due to the presence of an extra X chromosome in males, which leads to impaired testicular development and function. The testes may not descend properly, resulting in cryptorchidism.
**Why Each Wrong Option is Incorrect**
* **Option A:** 46,XY is the normal male karyotype, and would not be expected in a child with testes in the inguinal canals.
* **Option B:** 45,X is the karyotype associated with Turner syndrome, a condition that affects females, and would not be expected in a child with testes in the inguinal canals.
* **Option D:** 48,XXXY is a variant of Klinefelter syndrome, but is less common than 47,XXY.
**Clinical Pearl / High-Yield Fact**
Klinefelter syndrome is a sex chromosome disorder that affects males, and is characterized by the presence of an extra X chromosome. It is associated with a range of clinical features, including tall stature, infertility, and an increased risk of breast cancer.
**Correct Answer:** C. 47,XXY