A 2-Year-Old Boy Is Brought to the Physician for the Evaluation

A 2-year-old boy is brought to the physician for the evaluation of fever, difficulty breathing, and coughing for the past week. In the past year, he has had four sinus infections, three upper respiratory tract infections, and an episode of severe bronchiolitis requiring hospitalization. is born with facial dysmorphia and a cleft palate. Further evaluation reveals a heart condition with a right-to-left shunt and the absence of a thymic shadow on x-ray. Examination of this patient's lymph nodes will most likely show poor development of which of the following structures?

A) Cortical follicles
B) Medullary sinuses
C) Medullary cords
D) Paracortex region
E) Subcapsular sinuses

Correct Answer:

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