EGFR Testing for Metastatic Non-Small Cell Lung Cancer with Jonathan W. Riess, MD, MS: Case 2

Riess case 2:

A 73-year-old woman with progressing EGFR+ adenocarcinoma.

• A 73-year-old woman diagnosed with stage IV adenocarcinoma
• Based on her EGFR+ status, she was treated with erlotinib
• After 9 months her disease progressed, along with the presence of minor symptoms
• Tissue biopsy was impeded by the tumor’s location; therefore, cell-free DNA testing was ordered
• Based on the positive results for a T790M mutation, the patient was switched to osimertinib.
• Her disease continues to be well-controlled on second-line therapy