A child with cardiac defects, hypocalcemia, and distinct facial features such as a long face and small ears is most consistent with which syndrome, and what is the expected IQ range?

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Multiple Choice

A child with cardiac defects, hypocalcemia, and distinct facial features such as a long face and small ears is most consistent with which syndrome, and what is the expected IQ range?

The pattern described—a child with heart defects, hypocalcemia, and distinctive facial features such as a long face and small ears—points most strongly to 22q11.2 deletion syndrome (also known as DiGeorge or velocardiofacial syndrome). The deletion on chromosome 22q11.2 disrupts development of the third and fourth branchial pouches, leading to congenital heart defects (often conotruncal types), hypoparathyroidism with resulting hypocalcemia, and characteristic facial features. Cognitive outcomes in this syndrome are variable but commonly fall in the borderline to low-average range, with many individuals having learning difficulties. Other conditions listed do not typically present with this exact combination of cardiac defects, hypocalcemia, and the described facial gestalt, which is why this syndrome best fits the scenario.

The pattern described—a child with heart defects, hypocalcemia, and distinctive facial features such as a long face and small ears—points most strongly to 22q11.2 deletion syndrome (also known as DiGeorge or velocardiofacial syndrome). The deletion on chromosome 22q11.2 disrupts development of the third and fourth branchial pouches, leading to congenital heart defects (often conotruncal types), hypoparathyroidism with resulting hypocalcemia, and characteristic facial features. Cognitive outcomes in this syndrome are variable but commonly fall in the borderline to low-average range, with many individuals having learning difficulties. Other conditions listed do not typically present with this exact combination of cardiac defects, hypocalcemia, and the described facial gestalt, which is why this syndrome best fits the scenario.

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