Cancer Research and Treatment

Stereotactic Radiotherapy for the Treatment of Brain Metastases: Dae Yong Kim, Yong Chan Ahn, Seung Jae Huh, Jung Il Lee, Do Hyun Nam, Seung Chyul Hong, Hyung Jin Shin, Kwan Park, Jong Hyun Kim; J Korean Cancer Assoc. 2000;32(1):148-155.

Abstract PDF: PURPOSE
To evaluate the clinical results of stereotactic radiosurgery (SRS) and frac- tionated stereotactic radiotherapy (FSRT) for metastatic brain tumors.
MATERIALS AND METHODS
Nineteen patients with brain metastases (34 lesions) were treated with LINAC-based SRS or FSRT with or without whole brain radiotherapy between October 1995 and February 1998. SRS was preferred to FSRT in cases with three or more lesions and poor performance status. FSRT was preferred to SRS in cases with lesions larger than 3 cm and lesions located near or at the eloquent areas such as thalamus, brain stem, and optic apparatus. Single isocenter was used both in SRS and FSRT, and the median peripheral dose in SRS was 15 Gy (range 13~20 Gy), while that in FSRT was 21 Gy (range 15~24 Gy) by 3 Gy per fraction.
RESULTS
Local control was achieved in 79% (27/34 treated lesions) and 1-year over- all survival rate was 58% with the median survival of 12 months. Lethal progressive brain metastases, both local and regional, were in four patients (27% of all deaths). No significant differences in local control and survival was observed with histology, age, sex, performance status, tumor volume, number of lesions, or treatment modality. Unacceptable acute or late complications did not occur.
CONCLUSION
Stereotactic radiotherapy including SRS and FSRT is effective, non-invasive therapy for brain metastases. This study suggests that stereotactic radiotherapy might be an alternative to surgical resection in selected patients of brain metastases.

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Linear Accelerator-Based Stereotactic Radiosurgery for Acoustic Neurinomas: Hong Seok Jang, Sei Chul Yoon, Tae Suk Suh, Mi Ryeong Ryu, Yeon Shil Kim, Moon Chan Kim, Jun Ki Kang, Kyung Sub Shinn; J Korean Cancer Assoc. 1997;29(6):992-999.

Abstract PDF: No abstract available

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Stereotactic Radiosurgery and Fractionated Stereotactic Radiotherapy for Intracranial Schwannoma: Dae Yong Kim, Yong Chan Ahn, Jung Il Lee, Do Hyun Nam, Jeong Eun Lee, Do Hoon Lim, Inhwan J Yeo, Seung Jae Huh, Young Joo Noh, Hyung Jin Shin, Kwan Park, Jong Hyun Kim; J Korean Cancer Assoc. 2001;33(1):27-33.

Abstract PDF: PURPOSE
To assess the radiologic response and cranial nerve morbidity in intracranial schwannoma patients treated with stereotactic radiosurgery (SRS) and fractionated stereotactic radiotherapy (FSRT).
MATERIALS AND METHODS
Twenty-six patients with intracranial schwannoma were treated with linear accelerator- based SRS or FSRT between February 1995 and October 1999. The origin of schwannoma was acoustic nerve in twenty-one patients, facial nerve in two, trigeminal nerve in two, and glossopharyngeal nerve in one. SRS were performed with the median peripheral dose of 14 Gy (range 12-16), and FSRT were done with the median peripheral dose of 25 2 Gy (range 50-60).
RESULTS
With a median follow-up period of 33 months (range 12-67), the local control rate was 100%. Tumorregression was noted in eleven patients, and tumor stabilization was found in the remaining fifteen. Useful hearing preservation was achieved in two of three patients. Facial nerve neuropathy was shown in two patients and one patients developed trigeminal nerve neuropathy.
CONCLUSION
Stereotactic radiotherapy including SRS and FSRT provided excellent local control in intracranial schwannoma. It shows the possibility of a high rate of hearing preservation and an acceptable neurotoxicity, although the number of patients are small and follow-up is relatively short.

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