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Radiation therapy for brain metastases from breast cancer

Abstract

Background

Breast cancer is one of the most common malignancies that metastasize to the brain. Radiation therapy plays a central role in the management of brain metastases.

Methods

The medical records of 36 patients with brain metastases from breast cancer who underwent whole-brain radiation therapy (WBRT) at Kyoto University Hospital between 1993 and 2001 were reviewed. The treatment outcomes were analyzed retrospectively.

Results

The median age at the time of diagnosis of brain metastases was 52 years. Only 4 patients (11%) had a single metastasis, while the others had multiple metastases. Uncontrolled extracranial metastases were present in 26 patients at the time of diagnosis of brain metastases. All patients received WBRT at a median dose of 31 Gy. Eight patients received conventional external-beam boost irradiation, and 2 received boost stereotactic radiosurgery (SRS). The overall median survival time was 7.9 months. Uncontrolled extracranial metastases except for bone metastases and old age were significantly associated with a poor survival rate. Twenty-six patients (82%) showed initial response, but 15 developed CNS failure, including 9 patients whose tumor recurred at the original site, 4 patients who developed tumors elsewhere in the brain and 3 patients who exhibited meningeal spread. The median duration of intracranial failure was 5.0 months. Whole-brain dose, and total tumor dose did not affect intracranial control.

Conclusions

Radiation therapy yielded a high initial response, but the duration of effect was limited with external beam irradiation alone. New treatment strategies such as adding SRS need to be studied further.

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Abbreviations

WBRT:

Whole-brain radiation therapy

SRS:

Stereotactic radiosurgery

CNS:

Central nervous system

CT:

Computed tomography

MR:

Magnetic resonance

RTOG:

Radiation Therapy Oncology Group

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Author information

Correspondence to Masakazu Ogura or Michihide Mitsumori or Setsuko Okumura or Chikako Yamauchi or Sachiko Kawamura or Natsuo Oya or Yasushi Nagata or Masahiro Hiraoka.

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Cite this article

Ogura, M., Mitsumori, M., Okumura, S. et al. Radiation therapy for brain metastases from breast cancer. Breast Cancer 10, 349–355 (2003). https://doi.org/10.1007/BF02967656

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Key words

  • Breast cancer
  • Brain metastasis
  • Whole-brain radiation therapy
  • Survival
  • Intracranial control