• Journal of Korean Neurosurgical Society
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• 제53권3호
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• pp.190-193
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• 2013

A malignant peripheral nerve sheath tumor (MPNST) is a type of sarcoma that arises from peripheral nerves or cells of the associated nerve sheath. This tumor most commonly metastasizes to the lung and metastases to the spinal cord and brain are very rare. We describe a case of young patient with spinal cord and brain metastases resulting from MPNST. An 18-year-old man presented with a 6-month history of low back pain and radiating pain to his anterior thigh. Magnetic resonance imaging showed a paraspinal mass that extended from the central space of L2 to right psoas muscle through the right L2-3 foraminal space. The patient underwent surgery and the result of the histopathologic study was diagnostic for MPNST. Six months after surgery, follow-up images revealed multiple spinal cord and brain metastases. The patient was managed with chemotherapy, but died several months later. Despite complete surgical excision, the MPNST progressed rapidly and aggressively. Thus, patients with MPNST should be followed carefully to identify local recurrence or metastasis as early as possible.

• 대한영상의학회지
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• 제85권4호
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• pp.785-788
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• 2024

T2-fluid attenuation inversion recovery (이하 FLAIR) mismatch sign은 isocitrate dehydrogenase-mutant 성상세포종을 시사하는 영상 소견으로 알려져 있다. 이 증례 보고에서는 유방암 환자의 뇌에 생긴 점액성 뇌전이암이 T2-FLAIR mismatch sign처럼 보이는 사례를 소개한다. 특히 비조영증강 MRI에서 T2-FLAIR mismatch sign을 보이는 경우, 성상세포종 뿐만 아니라 뇌전이암을 감별진단에 염두에 두어야 한다.

• Radiation Oncology Journal
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• 제17권4호
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• pp.281-286
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• 1999

배경 및 목적 : 고형암의 뇌전이는 20$\~$40$\%$의 암환자에서 발생하고, 뇌전이 후 1년 생존율은 15$\%$정도로 예후가 불량하며 고식적 방사선치료 등에 의하여 70$\~$90$\%$의 환자에서 증상이 호전되나 대부분의 환자가 결국은 뇌전이로 인하여 사망하게 된다. 이에 고형암의 뇌전이로 방사선치료를 받은 환자를 후향적으로 조사하여 임상양상과 생존기간을 분석하고 예후인자를 파악하였다. 방 법 : 대상환자는 1987년 1월부터 1998년 1월까지 이화여자대학교 부속병원에서 고형암의 뇌전이로 고식적 전뇌 방사선치료를 받은 71예이었다 대상 환자의 중앙연령은 63세(24$\~$89세)였고 남자 50예, 여자 21예이었다. 고식적 치료 후 신경증상의 호전정도를 평가하고, 연령, 종양의 원발병소, 진단당시 뇌전이 동반 유무, 타장기 전이 유무, 뇌전이 병변 수, 치료방법에 따라 생존기간을 비교하였다. 결 과 : 뇌전이시 동반된 증상은 두통이 34예로 가장 많았으며 근력 약화 29예, 오심 구토 및 의식 변화 각 14예, 시력장애 8예, 구음장애 7예 순이었고 치료 후 신경증상의 호전은 64.9$\%$에서 관찰되었다. 뇌전이의 치료로 전체환자 중 7예에서는 뇌전이의 수술적 제거 후 전뇌 방사선치료를 받았고 나머지 64예는 전뇌 방사선치료만을 받았다. 전체환자의 중앙생존기간은 16주였고 1년 생존율은 IS.0%, 2년 생존율은 5.1$\%$였다. 타장기 전이가 없이 뇌전이 단독인 군(n=27)의 중앙생존기간은 33주로 타장기 전이가 있는 군의 10주에 비해 길었다(p=0.0018). 뇌전이 수가 단일 병소인 37예의 환자에서는 수술적 제거 후 방사선치료를 한 군(n=7)의 중앙생존기간이 40주로 방사선치료만 시행한 군의 16주에 비해 길었다(p=0.0438). 이 외에 연령, 원발암의 종류, 전신수행 상태, 진단당시 뇌전이 동반 유무, 뇌전이 병변 수에 따른 생존기간의 차이는 없었다. 결 론 : 고형암에서 뇌전이는 나쁜 예후인자이나 뇌로의 단독전이는 타장기 전이 동반에 비해 예후가 양호하므로 수술적 절제, 방사선치료 등의 다양한 방법을 이용한 보다 적극적인 치료로 생존율 및 삶의 질을 향상시킬 수 있을 것이다.

• Journal of Korean Neurosurgical Society
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• 제54권2호
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• pp.107-111
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• 2013

Objective : We investigated the effectiveness of stereotactic gamma knife Radiosurgery (GKR) for radioresistant brain metastases with the impact upon histology. Methods : Between April 2004 and May 2011, a total of 23 patients underwent GKR for 67 metastatic brain tumors from 12 renal cell cancers, 5 sarcomas and 6 melanomas. The mean age was 56 years (range, 18 to 79 years). Most of the patients were classified as the Radiation Therapy Oncology Group recursive partitioning analysis class II (91.3%). The synchronous metastasis was found in 6 patients (26.1%) and metachronous metastasis in 17 patients (73.9%). We analyzed the local control rate, intracranial progression-free survival (PFS) and overall survival (OS). Results : The mean tumor volume for GKR was 2.24 cc and the mean prescription dose was 19.4 Gy (range, 10 to 24) to the tumor margin. Out of metachronous metastases, the median duration to intracranial metastasis was 3.3 years in renal cell cancer (RCC), 2.4 years in melanoma and 1.1 years in sarcoma (p=0.012). The total local control rate was 89.6% during the mean 12.4 months follow-up. The six-month and one-year local control rate was 90.2% and 83% respectively. Depending on the pathology, the control rate of RCC was 95.7%, sarcoma 91.3% and melanoma 80.5% during the follow-up. The common cause of local failure was the tumor bleeding in melanoma. The median PFS and OS were 5.2 and 8.4 months in RCC patients, 6.5 and 9.8 months in sarcoma, and 3.8 and 5.1 months in melanoma. Conclusion : The GKR can be one of the effective management options for the intracranial metastatic tumors from the radioresistant tumors. The melanoma showed a poor local control rate compared to other pathologies because of the hemorrhage.

• 대한두경부종양학회지
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• 제34권1호
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• pp.9-13
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• 2018

Background/Objectives: Brain metastasis (BM) is a rare form of distant metastasis with papillary thyroid cancer (PTC). Patients with BM of PTC carry a poor prognosis. The aim of this study was to contribute to the understanding of this disease by analyzing patients with BM of PTC. Materials & Methods: Between March 2003 and December 2013, the patient database was conducted to identify thyroid cancer patients treated. Among the 22,758 thyroid cancer patients, 14 (0.06 %) were identified to have metastasis to the brain during follow-up. The medical records of 14 patients with BM were retrospectively reviewed, focusing on the following: patient characteristics, synchronous or previous distant metastasis, treatments including whole brain radiotherapy (WBRT), stereotactic radiosurgery (SRS) and surgery, and characteristics on radiologic findings, time interval between first diagnosis of primary thyroid cancer and BM and survival after BM. Results: The mean age at initial diagnosis and BM were $50.9{\pm}15.8years$ and $61.3{\pm}12.7years$. The mean duration between initial diagnosis and BM was $10.4{\pm}7.9years$. Patients were treated with varied combinations of surgery, SRS and WBRT except 4 patients who had refused treatment. The median overall survival (OS) time after BM diagnosis was 10 months (range 1 - 19). Patients receiving treatment (WBRT and/or surgery, SRS) had a significant longer median OS of 16.5 months in comparison to 3.5 months for those treated without treatment. (p = 0.005) Conclusion: Patients who received aggressive treatment had a longer OS than those with only supportive care. Treatment such as surgery, SRS and WBRT should be considered in patients with BM.

• Journal of Korean Neurosurgical Society
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• 제42권2호
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• pp.92-96
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• 2007

Objective : The authors have speculated that metastatic brain lesions from renal cell carcinoma (RCC) show diverse radiological patterns and tumor responses after Gamma knife surgery (GKS), and have hypothesized that these can be predicted from tumor radiological characteristics. The goal of the current study was to identify the radiological characteristics of RCC brain metastases and the predictors of initial radiosurgical response after GKS. Methods : A retrospective analysis was performed on 48 lesions in 18 patients with RCC brain metastasis treated by GKS. The radiological characteristics of these lesions in magnetic resonance images (MRI) were classified into 3 categories according to enhancement patterns in T1-weighted images and signal intensity characteristics in T2-weighted images. Responses to GKS were analyzed according to these categories, and in addition, other potential predictive factors were also evaluated. Results : MRI findings in the three categories were diverse, though numbers of the lesion were comparable. At 2-month MRI follow-ups after GKS, response rate was 54% and the local tumor control rate 83%. T2 signal intensity was found to be the principal predictive factor of response to GKS, namely negative predictive factor. Other variables such as age, sex, tumor volume, dose, duration from initial diagnosis to GKS, and previous systemic therapies failed to show significant relationships with treatment response by multivariate analysis. Conclusion : Careful evaluation of the radiological characteristics of brain metastases from RCC is important prior to GKS because MRI heterogeneity has predictive value in terms of determining initial tumor response.

• 대한암한의학회지
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• 제16권2호
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• pp.43-51
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• 2011

이번 증례에서 뇌전이가 동반된 IV기 비소세포성 폐암 환자에 대해 양한방 치료를 병행하여 VAS, FACT-L, FACIT-fatigue 등을 통하여 그 경과를 관찰한 바 방광자극증상 및 수면 등 삶의 질의 개선을 관찰할 수 있었다. 하지만 원활하지 못한 협진 체계로 인하여 환자 관리에 있어 문제점을 발견할 수 있었다. 향후 한방 치료를 통한 암환자 관리를 위해서는 접근성이 뛰어난 양한방 협진체계의 구축이 필수적인 것으로 사료된다.

• Clinical and Experimental Pediatrics
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• 제49권6호
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• pp.691-695
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• 2006

간모세포종은 15세 이하 연령에서 발생하는 간암 중 가장 흔하며 대부분 5세 미만에 발병된다. 진단시 폐전이가 동반되는 경우가 약 10%가 되나 심장이나 중추신경계에 전이된 보고는 상당히 드물며 예후도 좋지 못한 것으로 알려져 있다. 저자들은 약 4년 반 전 간모세포종으로 진단 받고 항암화학요법과 수술적 절제 후 추가 항암치료를 마치지 않고 추적관찰이 소실되었으나 그동안 무병 상태로 지내오다 폐와 좌측 심장, 중추신경계에 다발적으로 재발되어 다시 항암화학요법으로 치료를 시작한 후 호전을 보였으나 사정상 치료가 중단되어 있는 6세 여아에 대해 보고하는 바이다.

• 대한수의학회지
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• 제44권4호
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• pp.621-624
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• 2004

A 13-year-old female Miniature Pincher was euthanized after suffering from respiratory insufficiency and seizure. At necropsy, firm tan masses approsimately 4 to 5 cm in diameter were noted at the right caudal love and left cranial lobe of the lung. On cross sections of the cerebellum and the verebrum, several compressive firm round masses, 0.5 to 1 cm in diameter, were noted. similar looking nodules were also present in the mediastinal lymph nodes. Histopathologically, the neoplastic masses consisted of cuboidal shape epithelial cells that form glandular structure. The neoplastic cells have hyperchromatic nuclei with prominent nucleoli and moderate amount of cytoplasm. The degree of mitosis was high (4-6/400X). Multiple areas of necrosis, hemorrhage, and tumor emboli were also noted. Metastasis to the mediastinal lymph nodes, pancreas, and brain was confirmed. Based on the gross and histopathologic examinations, a diagnosis of primary metastatic pulmonary adenocarcinoma was made. Clinicaly recognized neurological signs were therefore due to brain metastasis.

• Investigative Magnetic Resonance Imaging
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• 제26권1호
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• pp.32-42
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• 2022

Purpose: To evaluate the clinical benefit of 2D contrast-enhanced T2 fluid-attenuated inversion recovery (CE-T2 FLAIR) image for detecting leptomeningeal metastasis (LM) in the brain metastasis work-up for lung cancer. Materials and Methods: From June 2017 to July 2019, we collected all consecutive patients with lung cancer who underwent brain magnetic resonance image (MRI), including contrast-enhanced 3D fast spin echo T1 black-blood image (CE-T1WI) and CE-T2 FLAIR; we recruited clinico-radiologically suspected LM cases. Two independent readers analyzed the images for LM in three sessions: CE-T1WI, CE-T2 FLAIR, and their combination. Results: We recruited 526 patients with suspected lung cancer who underwent brain MRI; of these, we excluded 77 (insufficient image protocol, unclear pathology, different contrast media, poor image quality). Of the 449 patients, 34 were clinico-radiologically suspected to have LM; among them, 23 were diagnosed with true LM. The calculated detection performance of CE-T1WI, CE-T2 FLAIR, and combined analysis obtained from the 34 suspected LM were highest in the combined analysis (AUC: 0.80, 0.82, and 0.89, respectively). The inter-observer agreement was also the highest in the combined analysis (0.68, 0.72, and 0.86, respectively). In quantitative analyses, CNR of CE-T2 FLAIR was significantly higher than that of CE-T1WI (Wilcoxon signed rank test, P < 0.05). Conclusion: Adding CE-T2 FLAIR might provide better detection for LM in the brain-metastasis screening for lung cancer.