Necrotizing tracheobronchitis identified on an indium-111-white blood cell scan.

The clinical entity of necrotizing tracheobronchitis (NTB) is well described in the pediatric literature. The incidence of NTB in neonatal autopsies varies from 4% to 44%. More than 3 hr of assisted ventilation may be necessary for the development of NTB in neonates. A similar clinical problem was described as "hemorrhagic tracheitis" in two adults during high frequency jet ventilation and as a complication of conventional mechanical ventilation in an adult. We present here a rather unusual case of NTB in an adult on mechanical ventilation, in whom tracheobronchitis was diagnosed incidentally with an 111In white blood cell scan obtained for other purposes.