Table 1

Proposed diagnostic criteria for classic cases of Mycoplasma pneumoniae-induced rash and mucositis

Mucocutaneous eruptionInvolvement of ≤10% body surface area
Number of mucosal sites involved≥2
Few vesiculobullous lesions, or scattered, atypicalYes
Targetoid lesions±
Clinical evidence of atypical pneumoniaFever, cough and auscultatory findings
Laboratory evidence of atypical pneumoniaIncrease in Mycoplasma pneumoniae (MP) IgM antibodies, MP in oropharyngeal or bullae cultures or PCR, and/or serial cold agglutinins