Shackelford G D, Siegel M J, McAlister W H
AJR Am J Roentgenol. 1978 Oct;131(4):603-5. doi: 10.2214/ajr.131.4.603.
Analysis of airway radiographs of 20 children with proven acute epiglottitis revealed that five (25%) had, in addition to supraglottic edema, localized subglottic edema radiographically indistinguishable from that seen in croup. In all five patients the etiologic organism was Hemophilus influenzae type B.