Videos

Dr. Rodriguez turns to treatment burden, a central concern for Mr. Smith, who cannot drive because of seizure precautions, lives 45 minutes from clinic, and has a wife who works part-time. She describes the subcutaneous (SC) formulation of amivantamab and how it changes the administration schedule: dosing is approximately 5 minutes versus up to 4 to 5 hours for intravenous (IV) chemotherapy, and the maintenance interval moves from every 2 weeks to every 4 weeks (Q4W). Patients still come weekly during cycle 1, with maintenance visits less frequent thereafter.

Dr. Rodriguez addresses the wife’s concern about managing side effects at home. She frames the main toxicities of amivantamab in two categories. The first is infusion-related reactions (IRRs), which are reduced with the subcutaneous formulation. The second is the combination of cutaneous toxicity (rash, paronychia) and venous thromboembolism (VTE), which requires structured prophylaxis and a proactive plan for at-home management.

Dr. Rodriguez discusses CNS surveillance for Mr. Smith, who has selected subcutaneous (SC) amivantamab plus lazertinib for his 4 brain metastases. His wife asks how often he will need brain MRIs and what to watch for. Dr. Rodriguez contrasts current practice with the pre-targeted-therapy era, when she would have imaged at 6 to 8 weeks primarily to document response and offer radiation if a patient had not responded.

Dr. Rodriguez walks through the central nervous system (CNS) efficacy data for the three first-line options. She notes that MARIPOSA was specifically designed for close intracranial monitoring: patients with baseline brain metastases were imaged every 8 weeks, and patients without baseline brain metastases were also followed closely, which she cites as a reason for its National Comprehensive Cancer Network (NCCN) Category 1 recommendation.

Dr. Estelamari Rodriguez introduces the case of Mr. Smith, a 53-year-old man who presents with new-onset headaches and a witnessed seizure. He is a former light smoker (5 pack-year, quit 15 years ago) with type 2 diabetes and no hepatic, renal, or cardiac impairment, no history of venous thromboembolism (VTE), and an Eastern Cooperative Oncology Group (ECOG) performance status of 1.