Medical Oncology
Physician insights on cancer treatment protocols, immunotherapy, targeted therapies, and clinical trial updates.
Recent Discussions
In which group of patients you would send for RNAseq for translocations/fusions that might be missed by NGS in advanced NSCLC?
In patients who are never/rare smokers in whom tissue NGS is negative, I would strongly consider RNAseq of a recent or fresh biopsy. You can find the occult fusion (or missed MET) in about 15% of NGS negative, TMB low cases based on this recent very nice paper from MSKCChttps://www.ncbi.nlm.nih.gov/...
What neoadjuvant therapy would you choose for a post menopausal woman with ER negative, PR positive high grade node negative breast cancer?
Assuming that there is no reason to doubt the results of the hormone receptor testing, and her HER2 is negative, I would treat her the same way I would a triple-negative cancer—I would not bother to send Oncotype as it should be high with the negative ER, and I wouldn't believe it if it came back lo...
Are there circumstances where you would recommend every 6 week dosing schedule for pembrolizumab monotherapy?
FDA approval for q 6 week dosing of pembrolizumab is awaited but has yet to occur; this would represent a welcome change for our patients, as just happened with the recent approval of q 4 week dosing of atezolizumab. Without FDA approval we are not using pembrolizumab 6 week dosing at this time, and...
Which adjuvant chemotherapy regimen would you recommend for a peri-menopausal woman with synchronous stage IA primary breast tumors, one that is ER+HER2+ and the second ER+HER2-?
I would treat the patient with paclitaxel 80mg/m2 x 12 weeks plus trastuzumab for a year (Tolaney et al., Clin Oncol 2019). The more difficult question is the optimal anti-estrogen therapy: tamoxifen (TAM), TAM + ovarian suppression (OS), or aromatase inhibitor (AI) + OS. This is because the SOFT an...
In the setting of COVID-19, would you perform a SLNB for a patient incidentally found to have microinvasive ER+ ILC in contralateral prophylactic mastectomy following neoadjuvant chemotherapy for a locally advanced triple positive breast cancer?
I would not recommend SLN biopsy, independent of COVID-19. This patient's prognosis is overwhelmingly dependent on the locally advanced triple negative breast cancer, not the microinvasive ER positive breast cancer. Acknowledging that the ER positive cancer may have been larger than microinvasive be...
What is your preferred first line treatment option for a fit patient with non-squamous NSCLC who is PDL1 positive (1-49%) with no driver mutations?
This is a group of patients that often gets combination chemo-immunotherapy. However, during the pandemic, many institutions including my own treated patients on single agent immunotherapy (on the basis of the KN-042 study) to avoid chemotherapy-induced risks. My preference now is to discuss the INS...
Do you recommend routine surveillance MRI brain for asymptomatic patients with metastatic HER2+ breast cancer?
I do not perform routine screening or surveillance MRI of the brain for asymptomatic patients with HER2 positive metastatic breast cancer. But I do have a low threshold to order brain imaging in such patients for early/minimal symptoms. My reasons for not performing routine screening/surveillance MR...
Would weak PR positivity make you consider adjuvant endocrine therapy for a young pre-menopausal woman with a HER2 positive, ER negative breast cancer?
I would discuss the uncertainties, and would offer tamoxifen at the most (I would not subject the patient to the toxicities of OFS and AI). I would also have a low threshold to discontinue tamoxifen if there are toxicities. If there are minimal to no side effects, it may be worthwhile getting the th...
What is your approach for endocrine therapy in young women (<35 years old) with HR+/HER2+ breast CA with residual disease after TCHP who will start adjuvant T-DM1?
She would be given the options of tamoxifen or ovarian suppression with an AI for five years and then a discussion at that time based on where the data goes in that time. Tamoxifen would have fewer side effects but less effective reduction of PFS per extrapolation from the SOFT/TEXT trials. Ovarian ...
After WBRT, what systemic therapy would you favor for maximal CNS penetrance in a patient with triple negative metastatic breast cancer and multifocal CNS disease?
With patients such as this, I would usually recommend the following: 1. Genomic testing (Strata, Foundation 1, etc.) to look for a mutation that might be targetable with a TKI that crosses the blood brain barrier well 2. Re-testing of the CNS cytology for HER2, given that we do have multiple drugs w...