Pulmonary Cryptococcal Infection Complicating Gefitinib Therapy in a Patient With EGFR L858R‐Positive Lung Adenocarcinoma: A Case Report

Key Points

• To highlight the potential misattribution of pulmonary nodules in EGFR-mutant lung adenocarcinoma patients on gefitinib as disease progression rather than secondary infections.
• Case report on a patient with EGFR L858R-positive lung adenocarcinoma receiving gefitinib.
• Discussion on differential diagnosis for new pulmonary nodules during treatment.
• Identification of pulmonary cryptococcosis as a complication in the case, warranting careful diagnostic practices.