Pulmonary Toxicity Associated with Mycophenolate Mofetil

Characterization of Pulmonary Toxicity Patterns

• Simple pulmonary eosinophilia demonstrates nonsegmental consolidation or ground-glass opacity that is "transient and migratory" with spontaneous resolution within 4 weeks being common, as documented by the Fleischner Society 1, 3
• The migratory, transient pattern of ground-glass opacities that wax and wane is characteristic of simple pulmonary eosinophilia, not mycophenolate mofetil toxicity, according to the Fleischner Society position paper 1, 2, 3
• The Fleischner Society categorizes this waxing/waning behavior as the "simple pulmonary eosinophilia pattern" of drug-related pneumonitis, distinct from other patterns 1, 2, 3

Differential Diagnosis and Management

• If true waxing and waning ground-glass opacities are observed in a patient on mycophenolate mofetil, consider alternative diagnoses including infection, organizing pneumonia from other causes, or concurrent drug reactions from other medications, as suggested by Praxis Medical Insights 4