Final answer:
The common chromosomal microdeletion causing Tetralogy of Fallot with pulmonary atresia or with an absent pulmonary valve is the 22q11 region.
Step-by-step explanation:
A microdeletion in the chromosomal region that is a common cause of Tetralogy of Fallot with pulmonary atresia or with an absent pulmonary valve is 22q11. Tetralogy of Fallot is a congenital heart defect with symptoms including heart murmurs, dyspnea, polycythemia, clubbing of fingers and toes, and issues with feeding in children. It includes four components: pulmonary infundibular stenosis, overriding aorta, ventricular septal defect, and right ventricular hypertrophy. Diagnosed through echocardiography, the condition requires extensive surgical repair for treatment. The mentioned chromosomal region, 22q11, is linked to a spectrum of cardiac anomalies, including Tetralogy of Fallot.