Cancer Research and Treatment

Case Report

Osimertinib Combined with Systemic Chemotherapy for EGFR Mutant, T790M-Negative, Non–Small Cell Lung Cancer Patients Who Develop Leptomeningeal Metastases with Extracranial Progression to Prior EGFR TKI: Hye Ryeon Kim, Hyunji Jo, Hongsik Kim, Joohyun Hong, Sehhoon Park, Hyun Ae Jung, Se-Hoon Lee, Jin-Seok Ahn, Myung-Ju Ahn; Cancer Res Treat. 2023;55(1):344-349. Published online March 26, 2022; DOI: https://doi.org/10.4143/crt.2021.1603

Leptomeningeal metastasis (LM) is a rare but fatal clinical condition with a short survival time. The incidence of LM from epidermal growth factor receptor mutant (EGFRm) non–small cell lung cancer (NSCLC) has increased due to the limited efficacy of first- or second-generation epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) in the central nervous system (CNS). Osimertinib is a third-generation, irreversible, CNS penetrant, oral EGFR TKI that demonstrates promising efficacy in CNS metastases regardless of T790M. Herein, we report four cases of T790M-negative EGFRm NSCLC patients treated with osimertinib combined with systemic chemotherapy, who progressed on prior EGFR TKI and developed LM with extracranial lesions. The combination treatment was well tolerated, and the mean overall survival from LM diagnosis was 14.7 months (95% confidence interval, 10.4 to 19.0). These results suggest that osimertinib combined with systemic chemotherapy would be a reasonable treatment option for T790M-negative EGFRm NSCLC patients who develop LM with extracranial progression to prior EGFR TKI. A further prospective study is warranted.

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Original Article

Head and Neck cancer

A Single-Arm, Prospective, Phase II Study of Cisplatin Plus Weekly Docetaxel as First-Line Therapy in Patients with Metastatic or Recurrent Salivary Gland Cancer: Hye Ryeon Kim, Su Jin Lee, Sehhoon Park, Hyun Ae Jung, Se-Hoon Lee, Han-Sin Jeong, Man Ki Chung, Myung-Ju Ahn; Cancer Res Treat. 2022;54(3):719-727. Published online November 1, 2021; DOI: https://doi.org/10.4143/crt.2021.1019

Abstract PDF PubReader ePub

Purpose
Salivary gland cancers (SGCs) are relatively rare but comprise various histologic subtypes, which complicates design of prospective trials. Systemic chemotherapy plays a limited role in treatment of SGCs, but cisplatin and docetaxel showed efficacy in a previous preclinical study. Here, we conduct a prospective, phase II study to evaluate the efficacy and toxicities of cisplatin plus weekly docetaxel in patients with metastatic or recurrent SGC.
Materials and Methods
We included patients with histologically confirmed SGCs of the following subtypes: mucoepidermoid carcinoma, adenocarcinoma, ductal carcinoma, or adenoid cystic carcinoma. Patients had no prior systemic chemotherapy for metastatic or recurrent tumors and at least one measurable lesion. Patients were treated with docetaxel 35 mg/m2 (D1, 8) and cisplatin 70 mg/m2 (D1) every 21 days.
Results
Forty-one patients were enrolled between April 2014 and October 2020. The median age was 58 years (range, 32 to 73 years). The most common histologic subtype was adenoid cystic carcinoma (63.4%), followed by ductal carcinoma (24.4%). The most common metastatic site was the lung (75.6%). The median treatment cycle was 5.5 (range, 3 to 8), and the objective response rate was 46.3%, with three complete responses. The median duration of response was 6.8 months (interquartile range, 4.0 to 10.2). The progression-free survival and overall survival were 9.4 months (95% confidence interval [CI], 8.4 to 10.5) and 28.2 months (95% CI, 22.7 to 33.6), respectively. There were no treatment-related deaths. The most common grade 3/4 adverse events were neutropenia (4.9%) and fatigue (4.9%).
Conclusion
Cisplatin plus weekly docetaxel is effective and tolerable with manageable toxicity as first-line therapy in patients with metastatic or recurrent SGC.

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