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Liang Q, Ge P, Liu Y, Zhu X, Lu S, Pan C, Ji Z, Wang Q, Wang Y. Central nervous system clear cell meningioma: a systematic literature review. Neurosurg Rev 2024; 47:35. [PMID: 38183517 DOI: 10.1007/s10143-023-02251-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/05/2023] [Accepted: 12/12/2023] [Indexed: 01/08/2024]
Abstract
Clear cell meningiomas are a rare histological subtype of World Health Organization (WHO) grade II meningioma. Despite its relatively low frequency, clear cell meningioma has attracted considerable attention because of its unique pathological characteristics, clinical behavior, and challenging management considerations. The purpose of our systematic review is to provide clinicians with a better understanding of this rare disease. PubMed was searched for articles in the English language published from 1988 to 2023 June. The keywords were as follows: "clear cell meningioma," "clear cell" and "meningioma." We analyzed clinical manifestations, radiological manifestations, pathological features, comprehensive treatment strategies, and prognosis to determine the factors influencing recurrence-free survival (RFS). Recurrence-free survival curves of related factors were calculated by the Kaplan‒Meier method. The log-rank test and Cox univariate analysis were adopted to assess the intergroup differences and seek significant factors influencing prognosis and recurrence. Fifty-seven papers met the eligibility criteria, including 207 cases of clear cell meningioma (CCM), which were confirmed by postoperative pathology. The fifty-seven articles involved 84 (40.6%) males and 123 (59.4%) females. The average age at diagnosis was 27.9 years (range, 14 months to 84 years). Among the symptoms observed, headache, neurologic deficit, and hearing loss were the most commonly reported clinical manifestations. Most tumors (47.8%) were located in the skull base region. Most tumors showed significant enhancement, and homogeneous enhancement was more common. A total of 152 (74.1%) patients underwent gross total resection (GTR), and 53 (25.9%) patients underwent subtotal resection (STR). During the follow-up, the tumor recurred in 80 (39.4%) patients. The log-rank test and the Cox univariate analysis revealed that tumor resection range (GTR vs. STR) and adjuvant treatment (YES vs. NO) were significant predictors of recurrence-free survival (RFS). Clear cell meningioma is a rare type of meningioma with challenging diagnosis and therapy. The prognosis of this disease is different from that of regular meningiomas. Recurrence remains a possibility even after total tumor resection. We found that the surgical resection range and adjuvant treatment affected the recurrence period. This finding provides significant guidance for the treatment of clear cell meningioma.
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Affiliation(s)
- Qi Liang
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China
| | - Pengfei Ge
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China
| | - Yanhua Liu
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China
| | - Xiaoxi Zhu
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China
| | - Shan Lu
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China
| | - Chengliang Pan
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China
| | - Zhilin Ji
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China
| | - Qingxuan Wang
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China
| | - Yubo Wang
- Department of Neurosurgery, First Hospital of Jilin University, 71 Xinmin Street, Changchun, 130021, Jilin, People's Republic of China.
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Intradural Pediatric Spinal Tumors: An Overview from Imaging to Novel Molecular Findings. Diagnostics (Basel) 2021; 11:diagnostics11091710. [PMID: 34574050 PMCID: PMC8469574 DOI: 10.3390/diagnostics11091710] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/11/2021] [Accepted: 09/14/2021] [Indexed: 12/20/2022] Open
Abstract
Pediatric spinal tumors are rare and account for 10% of all central nervous system tumors in children. Onset usually occurs with chronic nonspecific symptoms and may depend on the intra- or extradural neoplastic location. Meningiomas, schwannomas, and neurofibromas are the most common intradural-extramedullary lesions, while astrocytomas and ependymomas represent the majority of intramedullary tumors. The new molecular discoveries regarding pediatric spinal cancer currently contribute to the diagnostic and therapeutic processes. Moreover, some familial genetic syndromes can be associated with the development of spinal tumors. Currently, magnetic resonance imaging (MRI) is the standard reference for the evaluation of pediatric spinal tumors. Our aim in this review was to describe the imaging of the most frequent intradural intra/extramedullary pediatric spinal tumors and to investigate the latest molecular findings and genetic syndromes.
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Yang J, Wan W, Liu W, Jiao J, Jia Q, Zhong N, Yang X, Xiao J. Two novel cases of spinal clear cell meningioma with vertebra involvement. J Orthop Sci 2021; 26:919-925. [PMID: 30545721 DOI: 10.1016/j.jos.2018.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 10/04/2018] [Accepted: 11/05/2018] [Indexed: 11/16/2022]
Affiliation(s)
- Jian Yang
- Department of Orthopedic Oncology, Changzheng Hospital, Navy Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Wei Wan
- Department of Orthopedic Oncology, Changzheng Hospital, Navy Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Weibo Liu
- Department of Orthopedic Oncology, Changzheng Hospital, Navy Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China; Department of Spine Surgery, Qingdao Central Hospital, Siliunan Rd 127#, Shibei District, Qingdao, Shandong Province, China
| | - Jian Jiao
- Department of Orthopedic Oncology, Changzheng Hospital, Navy Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Qi Jia
- Department of Orthopedic Oncology, Changzheng Hospital, Navy Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Nanzhe Zhong
- Department of Orthopedic Oncology, Changzheng Hospital, Navy Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China
| | - Xinghai Yang
- Department of Orthopedic Oncology, Changzheng Hospital, Navy Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China.
| | - Jianru Xiao
- Department of Orthopedic Oncology, Changzheng Hospital, Navy Medical University, Fengyang Rd 415#, Huangpu District, Shanghai, China.
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TSUCHIYA T, IKEDA S, ISOO A, SAKAKIBARA H, KUMADA S, KOMORI T, TAKAI K. Intraoperative Anatomical Findings in Pediatric Clear Cell Meningioma of the Lumbar Spine: Case Report and Literature Review. NMC Case Rep J 2021; 8:519-527. [PMID: 35079512 PMCID: PMC8769484 DOI: 10.2176/nmccrj.cr.2020-0356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 02/24/2021] [Indexed: 11/20/2022] Open
Abstract
Clear cell meningioma (CCM) is a WHO classification Grade II meningioma. It is a very rare disease, of which only 41 cases of spinal cord CCM in children have been reported to date. CCMs sometimes do not have the “dural attachment” that is usually found in meningiomas, and our understanding of the origin of CCMs is therefore controversial. We hereby present a case of pediatric CCM of the lumbar spine, in which we examined intraoperatively, the detailed anatomical location of the tumor. The case is a 10-year-old boy, who presented to our hospital with a 2-month history of lower back and bilateral lower extremity pain upon waking, which gradually worsened. Lumbar spine CT and MRI revealed an intradural extramedullary tumor at the L3 vertebral level, and surgery was performed to remove it. The tumor was in close contact with the dura mater, and also in contact with the cauda equina via the arachnoid. The tumor was likely located primarily between the dura mater and arachnoid. The pathological diagnosis was CCM, with an MIB-1 index of less than 1%. His back pain and bilateral lower extremity pain improved after surgery, and he was discharged from our hospital. Postoperative radiation therapy was not performed. Based on this case, we suggest that intraoperative examination of the anatomical location of these tumors and accumulation of relevant experience are important to elucidate the embryological mechanisms of this rare disease.
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Affiliation(s)
- Takahiro TSUCHIYA
- Department of Neurosurgery, Tokyo Metropolitan Neurological Hospital, Fuchu, Tokyo, Japan
| | - Syunsuke IKEDA
- Department of Neurosurgery, Tokyo Metropolitan Matsuzawa Hospital, Tokyo, Japan
| | - Ayako ISOO
- Department of Neurosurgery, Tokyo Metropolitan Neurological Hospital, Fuchu, Tokyo, Japan
| | - Hiroshi SAKAKIBARA
- Department of General Pediatrics, Tokyo Metropolitan Children's Medical Center, Fuchu, Tokyo, Japan
| | - Satoko KUMADA
- Department of Neuropediatrics, Tokyo Metropolitan Neurological Hospital, Fuchu, Tokyo, Japan
| | - Takashi KOMORI
- Laboratory Medicine and Pathology, Tokyo Metropolitan Neurological Hospital, Fuchu, Tokyo, Japan
| | - Keisuke TAKAI
- Department of Neurosurgery, Tokyo Metropolitan Neurological Hospital, Fuchu, Tokyo, Japan
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Hao Z, Hu S, Yu NZ. Rare intraspinal clear cell meningioma in children: a case report and literature review. J Int Med Res 2020; 48:300060520952266. [PMID: 33135529 PMCID: PMC7780564 DOI: 10.1177/0300060520952266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Meningioma of the spinal canal is very rare. Clear cell meningioma (CCM) with special histological features occurs more commonly in the spinal cord. A review of the published English-language literature identified 40 reported cases of children with intraspinal CCM and this current report presents an additional case of a 3-year-old child with confirmed lumbar CCM. The current case underwent gross total resection of the CCM. At 9 months after the operation, lumbar magnetic resonance imaging was undertaken and confirmed the absence of tumour recurrence. The child was able to walk normally again. During this period, the child did not receive adjuvant treatments such as radiotherapy and chemotherapy. An evaluation of the 41 cases demonstrated the following: (i) there was no significant difference between the recurrence rate of females and males; (ii) there was a significant difference in the recurrence rate based on the extent of resection (gross total resection versus partial resection); (iii) the recurrence rate in patients where the number of involved segments ≥3 levels was significantly higher than that in patients where the number of involved segments was 1–2 levels. For children with CCM, complete surgical resection might be an important characteristic for predicting the risk of the recurrence of CCM.
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Affiliation(s)
- Zheng Hao
- Department of Neurosurgery, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China.,Department of Emergency Trauma Centre, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Si Hu
- Department of Neurosurgery, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Nian-Zu Yu
- Department of Neurosurgery, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
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Zhang H, Ma L, Shu C, Dong LQ, Ma YQ, Zhou Y. Spinal Clear Cell Meningiomas: Clinical Features and Factors Predicting Recurrence. World Neurosurg 2019; 134:e1062-e1076. [PMID: 31765868 DOI: 10.1016/j.wneu.2019.11.093] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/14/2019] [Accepted: 11/15/2019] [Indexed: 01/29/2023]
Abstract
OBJECTIVE As a World Health Organization grade II tumor of the nervous system, clear cell meningioma (CCM) is an uncommon histologic variant of meningioma. Spinal CCMs are even rarer, with <100 spinal CCMs reported in the English literature. We present this study to characterize clinical manifestations of spinal CCMs and determine the factors predicting recurrence. METHODS A literature search was performed for relevant case reports and series in PubMed and Embase until September 1, 2019. These articles were reviewed to identify clinical features, treatment modalities, and prognosis of patients with spinal CCMs. RESULTS Eighty-four spinal CCMs were analyzed. Of these patients, 36 (42.9%) were young (age ≤18 years), and the mean age at resection was 24 years. Fifty-three patients (63.1%) were female and 31 (36.9%) were male. Most of the tumors (56/84, 66.7%) were located in the lumbar region. In 31 patients (36.9%) >2 segments in the craniocaudal direction were involved (number of involved segments ≥3 levels). Gross tumor resection was performed in 77 patients (91.7%). Twenty patients (23.8%) showed radiographic evidence of recurrence during follow-up. Recurrence-free survival at 1, 5, and 10 years after resection of spinal CCM was 87%, 71%, and 47%, respectively. Multivariate analysis showed that age ≤18 years (hazard ratio [HR], 3.64; P = 0.024), subtotal resection (HR, 3.43; P = 0.031), and segments involving ≥3 levels (HR, 5.66; P = 0.002) were associated with increased recurrence. CONCLUSIONS Spinal CCMs have their own unique clinical features compared with conventional spinal meningiomas and intracranial CCMs. Spinal CCMs have a predilection to affect younger patients, are prone to appear in the lumbar region, and have a high recurrence rate. Age ≤18 years, subtotal resection, and involvement of long segments (≥3 levels) are positive predictors of recurrence.
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Affiliation(s)
- Hui Zhang
- Department of Neurosurgery, Air Force Medical Center of the Chinese PLA, Beijing, China
| | - Li Ma
- Department of Anesthesiology, 7th Medical Center of the Chinese PLA General Hospital, Beijing, China
| | - Cheng Shu
- Department of Neurosurgery, Air Force Medical Center of the Chinese PLA, Beijing, China
| | - Lian-Qiang Dong
- Department of Neurosurgery, Air Force Medical Center of the Chinese PLA, Beijing, China
| | - Ya-Qun Ma
- Department of Anesthesiology, 7th Medical Center of the Chinese PLA General Hospital, Beijing, China.
| | - Yan Zhou
- Department of Neurosurgery, Air Force Medical Center of the Chinese PLA, Beijing, China
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Wu L, Fang J, Yang J, Jia W, Xu Y. Clinical features and surgical outcomes of spinal clear cell meningioma: An institutional experience. J Clin Neurosci 2019; 69:55-60. [DOI: 10.1016/j.jocn.2019.08.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/05/2019] [Indexed: 11/30/2022]
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Li J, Zhang S, Wang Q, Cheng J, Deng X, Wang Y, Hui X. Spinal Clear Cell Meningioma: Clinical Study with Long-Term Follow-Up in 12 Patients. World Neurosurg 2018; 122:e415-e426. [PMID: 30342264 DOI: 10.1016/j.wneu.2018.10.064] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 10/06/2018] [Accepted: 10/08/2018] [Indexed: 02/05/2023]
Abstract
BACKGROUND Clear cell meningioma (CCM) is a rare histologic subtype of meningioma. The features of CCMs have commonly been based on intracranial cases. However, CCMs in the spinal cord are even rarer, and their natural history, management, and prognosis remain ill-defined. METHODS From January 2006 to January 2018, 12 patients with spinal CCM were treated in our hospital. The clinical features, radiologic findings, diagnosis, treatment, and outcome of these patients were analyzed retrospectively. Additionally, we performed a review of the reported data on spinal CCMs. RESULTS CCMs accounted for 2.8% of all the spinal meningiomas treated in our hospital. The most common localization of this disease was the lumbar region (7 of 12). The mean age at diagnosis was significantly younger than that of patients with spinal meningiomas (28.8 ± 13.4 years vs. 54.0 ± 14.4 years). During the follow-up period, 5 patients (41.7%) experienced tumor recurrence. Kaplan-Meier analysis showed that younger patients had a significantly shorter progression-free survival time than older patients. The review of the reported data showed that 55 cases of spinal CCMs had been reported. Nineteen patients (38.0%) had developed local recurrence, with a 5-year progression-free survival rate of 33.3%. CONCLUSIONS Spinal CCMs are extremely rare tumors with a predilection to affect younger patients and have a high recurrence rate. Although gross total resection is considered to be the optimal treatment, radiotherapy could be considered for patients who had undergone subtotal resection or for younger patients, regardless of the extent of removal. Close follow-up of the entire neuraxis for years is crucial.
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Affiliation(s)
- Jiuhong Li
- Department of Neurosurgery, West China Hospital of Sichuan University, Sichuan, China
| | - Si Zhang
- Department of Neurosurgery, West China Hospital of Sichuan University, Sichuan, China
| | - Qiguang Wang
- Department of Neurosurgery, West China Hospital of Sichuan University, Sichuan, China
| | - Jian Cheng
- Department of Neurosurgery, West China Hospital of Sichuan University, Sichuan, China
| | - Xueyun Deng
- Department of Neurosurgery, Nanchong Central Hospital, The Second Clinical Medical College of North Sichuan Medical College, Nanchong, China
| | - Yanchao Wang
- Department of Neurosurgery, West China Hospital of Sichuan University, Sichuan, China
| | - Xuhui Hui
- Department of Neurosurgery, West China Hospital of Sichuan University, Sichuan, China.
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Kawasaki Y, Uchida S, Onishi K, Okanari K, Fujiki M. Pediatric nondura-based clear cell meningioma of the cauda equina: case report and review of literature. Br J Neurosurg 2018; 34:215-218. [PMID: 29363346 DOI: 10.1080/02688697.2018.1429565] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Although spinal meningiomas are uncommon in children, clear cell meningioma has been described as the most common variant of spinal meningiomas in the pediatric age group. 24 cases of pediatric spinal clear call meningioma have been reported in the literature. We report one case and review the literature regarding pediatric spinal clear cell meningioma.
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Affiliation(s)
- Yukari Kawasaki
- Department of Neurosurgery, Graduate School of Medicine, Oita University, Oita, Japan
| | - Susumu Uchida
- Department of Neurosurgery, Graduate School of Medicine, Oita University, Oita, Japan
| | - Kouhei Onishi
- Department of Neurosurgery, Graduate School of Medicine, Oita University, Oita, Japan
| | - Kazuo Okanari
- Department of Pediatrics, Graduate School of Medicine, Oita University, Oita, Japan
| | - Minoru Fujiki
- Department of Neurosurgery, Graduate School of Medicine, Oita University, Oita, Japan
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Li P, Yang Z, Wang Z, Zhou Q, Li S, Wang X, Wang B, Zhao F, Liu P. Clinical features of clear cell meningioma: a retrospective study of 36 cases among 10,529 patients in a single institution. Acta Neurochir (Wien) 2016; 158:67-76. [PMID: 26573513 DOI: 10.1007/s00701-015-2635-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 11/02/2015] [Indexed: 11/29/2022]
Abstract
BACKGROUND Clear cell meningioma (CCM) is a rare subtype of meningioma. We present the largest series of 36 CCMs and evaluate several prognostic factors of patient's clinical outcome. METHODS Thirty-six patients with pathologically confirmed CCM among a total of 10,529 meningioma patients were retrospectively reviewed. RESULTS CCM constituted 0.3 % of the intracranial meningiomas and 1.4 % of the intraspinal meningiomas. The male-to-female ratio (36 vs 64 %) for CCMs was similar to that for total meningiomas (28 vs 72 %) patients (chi-squared test, p = 0.3). The mean age at diagnosis of CCM patients (29.3 ± 18.4 years) was significantly younger than that of total meningiomas (49.8 ± 11.9 years) patients (t-test, p = 0). During the follow-up, 15 patients (42 %) suffered from tumor recurrence. The recurrence time ranged from 10 months to 12 years, with a median time of 29 months. Kaplan-Meier survival analysis showed that patients after total resection (Simpson grades I and II) had significantly longer progression-free survival (PFS) time than those after subtotal resection (Simpson grades III and IV) (log-rank test, p = 0.006). However, age (≤20 years or >20 years, p = 0.9), gender (p = 0.3), postoperative radiotherapy (p = 0.4), progesterone receptor staining (positivity or negativity, p = 0.2), and Ki-67 index (≤5 % or >5 %, p = 0.4) did not have significant effects on patients' PFS time. CONCLUSIONS The proportion of CCM in spinal meningiomas is likely to be much larger than that in intracranial meningiomas. CCMs should be resected totally when possible to decrease the risk of recurrence or prolong patient's PFS time.
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Affiliation(s)
- Peng Li
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, 6, Tiantan Xili, Dongcheng District, 100050, Beijing, China
| | - Zhijun Yang
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, 6, Tiantan Xili, Dongcheng District, 100050, Beijing, China
| | - Zhenmin Wang
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, 6, Tiantan Xili, Dongcheng District, 100050, Beijing, China
| | - Qiangyi Zhou
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, 6, Tiantan Xili, Dongcheng District, 100050, Beijing, China
| | - Shiwei Li
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, 6, Tiantan Xili, Dongcheng District, 100050, Beijing, China
| | - Xingchao Wang
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, 6, Tiantan Xili, Dongcheng District, 100050, Beijing, China
| | - Bo Wang
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, 6, Tiantan Xili, Dongcheng District, 100050, Beijing, China
| | - Fu Zhao
- Department of Neural Reconstruction, Beijing Neurosurgery Institute, Capital Medical University, Beijing, China
| | - Pinan Liu
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, 6, Tiantan Xili, Dongcheng District, 100050, Beijing, China.
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