DiGeorge Syndrome:
- Cellular immunodeficiency disorder caused by deletion of a segment of chromosome 22 (22q11), affecting endodermal derivatives of the third and fourth pharyngeal pouches.
- Clinical Features (Remembered by CATCH):
- C – Cardiac defects
- A – Abnormal facies
- T – Thymic aplasia
- C – Cleft palate
- H – Hypocalcemia