Synchronous multiple primary lung cancers with shared EGFR mutation but differential imaging findings and pathological subtypes: A case report.

Lung cancer is a leading cause of cancer mortality worldwide. As the incidence of lung cancer increases in recent years, the number of patients diagnosed with synchronous multiple primary lung cancers (SMPLC) is also rising. SMPLC diagnosis is often made based on the clinical course, imaging findings, and histologic and molecular features. Standard lobectomy is the main therapeutic modality for SMPLC. Because maximum retention of lung function is essential, sublobectomy is also a commonly used surgical strategy when appropriate. The question is how to optimize the sequence of lobectomy and sublobectomy for patients with SMPLC. Thoracoscope lobectomy for the primary lesion plus sublobectomy for the secondary lesions is the most commonly used approach. Here we present a case of SMPLC with sublobectomy followed by lobectomy.