Expected headings
"Plain radiographs"
"congenital anomalies (e.g. craniosynostosis syndromes, first arch syndromes, Down syndrome, osteodysplasia)"
"The most important differential diagnosis is that of silent sinus syndrome. In such cases atelectasis is progressive and is more likely to be associated with symptomatic orbital symptoms such as diplopia, hypoglobus and enophthalamus."