Lower respiratory tract illness due to Mycoplasma pneumoniae is typica
lly mild and self-limited. There are, however, numerous reports of ser
ious and life-threatening cases of mycoplasma pneumonia in adults. We
present a case involving a 4-year-old girl with severe mycoplasma infe
ction and necrotizing pneumonitis requiring lobectomy. A detailed path
ological report is provided. (C) 1997 Wiley-Liss, Inc.