NOT a feature of Digeorge Syndrome
**Core Concept**
Digeorge Syndrome is a congenital disorder characterized by thymic hypoplasia, parathyroid gland aplasia or hypoplasia, and various degrees of cardiac anomalies. It is caused by a deletion in the 22q11.2 region of chromosome 22, leading to impaired development of the third and fourth pharyngeal pouches. This results in defects in the thymus, parathyroid glands, and other structures derived from these embryonic tissues.
**Why the Correct Answer is Right**
The correct answer will be a feature that is not typically associated with Digeorge Syndrome. The syndrome is characterized by a combination of thymic hypoplasia, leading to impaired T cell development and function, parathyroid gland aplasia or hypoplasia, resulting in hypocalcemia, and cardiac anomalies. The cardiac anomalies are usually conotruncal defects, such as tetralogy of Fallot, truncus arteriosus, or interrupted aortic arch.
**Why Each Wrong Option is Incorrect**
**Option A:** **Constitutional Delay** - This is not a feature of Digeorge Syndrome, which is a congenital disorder resulting from a chromosomal deletion.
**Option B:** **Hypocalcemia** - This is a common feature of Digeorge Syndrome due to parathyroid gland aplasia or hypoplasia.
**Option C:** **Cardiac Anomalies** - Conotruncal cardiac anomalies are a hallmark of Digeorge Syndrome.
**Option D:** **Short Stature** - While some individuals with Digeorge Syndrome may have growth retardation, it is not a universal feature of the condition.
**Clinical Pearl / High-Yield Fact**
Digeorge Syndrome is a classic example of a condition resulting from a chromosomal deletion, and it highlights the importance of genetic testing in the diagnosis of congenital disorders.
**Correct Answer: A. Constitutional Delay**