Dramatic intracranial response to osimertinib in a poor performance status patient with lung adenocarcinoma harboring the epidermal growth factor receptor T790M mutation: A case report

  • Authors:
    • Takehiro Uemura
    • Tetsuya Oguri
    • Minami Okayama
    • Hiromi Furuta
    • Yoshihiro Kanemitsu
    • Osamu Takakuwa
    • Hirotsugu Ohkubo
    • Masaya Takemura
    • Ken Maeno
    • Yutaka Ito
    • Akio Niimi
  • View Affiliations

  • Published online on: March 3, 2017     https://doi.org/10.3892/mco.2017.1181
  • Pages: 525-528
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Abstract

We herein report a case of dramatic intracranial response to osimertinib in a poor performance status patient with lung adenocarcinoma harboring the epidermal growth factor receptor (EGFR) T790M mutation encoded in exon 20. The patient was a 59-year-old woman with EGFR exon 19 deletion-positive lung adenocarcinoma, who relapsed with multiple brain metastases. Computed tomography‑guided biopsy of the left pleural tumor revealed adenocarcinoma harboring an EGFR exon 19 deletion and an EGFR T790M mutation encoded in exon 20. The patient was treated with osimertinib, a third-generation EGFR tyrosine kinase inhibitor. Two days after treatment initiation, the patient displayed profound disturbance of consciousness, possibly due to carcinomatous meningitis, and treatment had to be discontinued due to difficulty in taking osimertinib. However, the patient gradually started to recover consciousness and, after 3 days, she was again able to take osimertinib. One month after the initiation of osimertinib treatment, magnetic resonance imaging revealed an apparent reduction in brain metastases. The patient is currently under continued treatment with osimertinib. At the last follow‑up (February, 2017) she exhibited partial response to the treatment.
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April 2017
Volume 6 Issue 4

Print ISSN: 2049-9450
Online ISSN:2049-9469

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APA
Uemura, T., Oguri, T., Okayama, M., Furuta, H., Kanemitsu, Y., Takakuwa, O. ... Niimi, A. (2017). Dramatic intracranial response to osimertinib in a poor performance status patient with lung adenocarcinoma harboring the epidermal growth factor receptor T790M mutation: A case report. Molecular and Clinical Oncology, 6, 525-528. https://doi.org/10.3892/mco.2017.1181
MLA
Uemura, T., Oguri, T., Okayama, M., Furuta, H., Kanemitsu, Y., Takakuwa, O., Ohkubo, H., Takemura, M., Maeno, K., Ito, Y., Niimi, A."Dramatic intracranial response to osimertinib in a poor performance status patient with lung adenocarcinoma harboring the epidermal growth factor receptor T790M mutation: A case report". Molecular and Clinical Oncology 6.4 (2017): 525-528.
Chicago
Uemura, T., Oguri, T., Okayama, M., Furuta, H., Kanemitsu, Y., Takakuwa, O., Ohkubo, H., Takemura, M., Maeno, K., Ito, Y., Niimi, A."Dramatic intracranial response to osimertinib in a poor performance status patient with lung adenocarcinoma harboring the epidermal growth factor receptor T790M mutation: A case report". Molecular and Clinical Oncology 6, no. 4 (2017): 525-528. https://doi.org/10.3892/mco.2017.1181