Abstract | LESSONS LEARNED: This phase II trial evaluated the efficacy of erlotinib for patients with non-small cell lung cancer with leptomeningeal metastasis. The 17 cerebrospinal fluid specimens that were available for epidermal growth factor receptor mutation analysis were all negative for the resistance-conferring T790M mutation. The cytological objective clearance rate was 30.0% (95% confidence interval: 11.9%-54.3%). The median time to progression was 2.2 months. The rate of cerebrospinal fluid penetration among these patients was equivalent to those in previous reports regarding leptomeningeal metastasis. BACKGROUND: Leptomeningeal metastases (LM) occur in approximately 5% of patients with non-small cell lung cancer (NSCLC) and are associated with a poor prognosis. However, no prospective study has identified an active chemotherapeutic drug in this setting. METHODS: Patients were considered eligible to receive erlotinib if they had NSCLC with cytologically confirmed LM. The objective cytological clearance rate, time to LM progression ( TTP), overall survival (OS), quality of life outcomes, and pharmacokinetics were analyzed. This study was closed because of slow accrual at 21 of the intended 32 patients (66%). RESULTS: Between December 2011 and May 2015, 21 patients (17 with activating epidermal growth factor receptor [EGFR] mutations) were enrolled. The 17 cerebrospinal fluid specimens available were all negative for the T790M mutation, which confers erlotinib resistance. The clearance rate was 30.0% (95% confidence interval [CI]: 11.9%-54.3%), the median TTP was 2.2 months, and the median OS was 3.4 months. Significantly longer TTP and OS times were observed in patients with mutant EGFR (p = .0113 and p < .0054, respectively). The mean cerebrospinal fluid penetration rate was 3.31% ± 0.77%. There was a good correlation between plasma and cerebrospinal fluid (CSF) concentrations, although there was no clear correlation between pharmacokinetic parameters and clinical outcome. CONCLUSION:
Erlotinib was active for LM and may be a treatment option for patients with EGFR-mutated NSCLC and LM.
|
Authors | Kaname Nosaki, Takeharu Yamanaka, Akinobu Hamada, Yoshimasa Shiraishi, Taishi Harada, Daisuke Himeji, Takeshi Kitazaki, Noriyuki Ebi, Takayuki Shimose, Takashi Seto, Mitsuhiro Takenoyama, Kenji Sugio |
Journal | The oncologist
(Oncologist)
Vol. 25
Issue 12
Pg. e1869-e1878
(12 2020)
ISSN: 1549-490X [Electronic] England |
PMID | 32654250
(Publication Type: Clinical Trial, Phase II, Journal Article)
|
Copyright | © AlphaMed Press; the data published online to support this summary are the property of the authors. |
Chemical References |
- Protein Kinase Inhibitors
- Erlotinib Hydrochloride
- ErbB Receptors
|
Topics |
- Carcinoma, Non-Small-Cell Lung
(drug therapy, genetics)
- ErbB Receptors
(genetics)
- Erlotinib Hydrochloride
(therapeutic use)
- Humans
- Lung Neoplasms
(drug therapy, genetics)
- Mutation
- Protein Kinase Inhibitors
(therapeutic use)
- Quality of Life
|