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Review Question - QID 109302

Germ Layer Derivatives Defects Mesodermal defects VACTERL QID: 109302 (M1.EB.17.4799)
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QID 109302 (Type "109302" in App Search)
A primigravid 28-year-old woman delivers a 38-week-old male infant via spontaneous vaginal delivery. She had no prenatal care during her pregnancy. At birth the infant has underdeveloped hands and radiograph reveals missing phalanges in the thumbs. Examination of the buttocks reveals a missing anus. Further work-up reveals flow between the two ventricles on echocardiography and a single kidney on preliminary abdominal ultrasound. The infant also has difficulty feeding that results in coughing and apnea. Which of the following tissues was most likely affected during embryologic development?
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