Episode 032: Lung Cancer Series, Pt. 9: Metastatic NSCLC without driver mutations

Lung cancer is one of the most commonly diagnosed type of cancer and so it is fitting that we start the first of our disease-specific oncology series with this diagnosis. This week, we start our discussion on metastatic non-small cell lung cancer, focusing on NSCLC without driver mutations.


  • The approach to treatment of a patient with widespread metastatic NSCLC (mNSCLC) is very different than a patient without distant disease, which highlights why we do what we do:

    • Important to complete staging (discussed in prior episodes) to determine the extent of disease

    • Important to check molecular testing (looking for mutations in the cancer cells) and IHC for tumor proportion score (TPS) helps determine treatment options

  • Choosing a treatment is based on:

    • Histology - cannot use pemetrexed or bevacizumab in squamous cell

    • Platinum - Carboplatin is usually used (as opposed to our prior discussions about using Cisplatin because of LACE pooled analysis data)

      • Why is Cisplatin not a great idea? Cisplatin should not be used if patients have (high yield to know cisplatin eligibility criteria!!):

        • Poor performance status

        • Patients with eGFR <60

        • If a patient has baseline hearing loss

        • If a patient has baseline neuropathy

        • Patients with NYHF class III+

      • If patient is getting “palliative” / non-curative setting, you want to spare patients these terrible potential side effects

    • Immunotherapy - All patients with mNSCLC should have IO considered for treatment, unless they have contraindications. Considerations include:

      • Patients with EGFR and ALK mutations - patients with these mutations do NOT respond well to IO so should not use

      • TPS score:

        • Patients with score >50% can get IO monotherapy (spared chemotherapy)

          • KEYNOTE 024: approval for pembrolizumab monotherapy in patient with PDL1>50%

            • Study compared pembro to platinum doublet

            • OS 70% vs. 50% at one year

          • IMPOWER110: approval for atezolizumab monotherapy

            • Study compared atezo to chemotherapy

            • OS 64.9% vs 50% at 12 months

        • Patients with score <50% can get IO + chemotherapy

          • KEYNOTE 189: Showed that the addition of Pembrolizumab to carboplatin/pemetrexed followed by pembro/pemetrexed maintenance in mNSCLC with adenocarcinoma histology had impressive benefits

            • Carbo/taxol/pembro for squamous histology

          • Lots of other trials, check out NCCN for a comprehensive list

      • Putting this all together:

        • In PDL1 >50% WITHOUT SYMPTOMS: IO alone

        • In PDL1 >50% WITH SYMPTOMS: Chemo + IO

        • In PDL1 <50%: 

          • Lots of options, but usually some combination of chemotherapy + IO

          • Many people use Pembro, as it was first to market

  • Management of mNSCLC to the brain:

    • Recommend discussion with radiation oncology about role of SRS


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Episode 033: Lung Cancer Series, Pt. 10: Metastatic NSCLC with driver mutations

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Episode 031: Lung Cancer Series, Pt. 8: Surgical considerations in early stage NSCLC