This rare disease has always been poorly defined and undergone several classifications and name changes over time. They are rare and perhaps have different names and diagnostic criteria in different parts of the world. To understand the disease further, there are now several international chILD networks, trying to define and develop treatments for this heterogenous disorder. They all have various clinical phenotypes but typically an infant or child will present with shortness of breath, chest X-ray changes comprising of diffuse infiltrates with a restrictive ventilatory defect and impaired gas exchange on lung function tests in those who …