Diamond-Blackfan anemia typically follows a(n) genetic inheritance pattern.
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A 1-month-old infant boy is brought to the office because a routine screening complete blood count (CBC) revealed a moderate anemia 1 week ago. Examination shows that the infant is small for his age (5th percentile for both weight and length) and has abnormal facies. On auscultation, a II/VI, harsh, holosystolic murmur is heard at the left of the sternum between the fourth and fifth. ribs. Repeat CBC is obtained.
Which of the following is the most likely diagnosis?