system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 6-month-old boy is brought to the emergency department because of fever, fast breathing, and difficulty feeding for 2 days. His mother reports that he has had recurrent pneumonia and has been hospitalized for severe dehydration secondary to acute gastroenteritis caused by rotavirus infection three times in the past 4 months. He is at the 3rd percentile for both height and weight. Examination shows a generalized, erythematous, scaly rash and white patches on the tongue and buccal mucosa that bleed when scraped. The remainder of the examination shows no abnormalities. An x-ray of the chest shows bilateral interstitial infiltrates and an absent thymic shadow. Which of the following is the most likely cause of this patient's condition?
assistant
IL-2 receptor gamma chain defect