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Xiaodong Pang, Chunyu Liu, Baogan Peng Department of Spinal Surgery, The Third Medical Center of Chinese PLA General Hospital, Beijing 100039, People’s Republic of ChinaCorrespondence: Baogan PengDepartment of Spinal Surgery, The Third Medical Center of Chinese PLA General Hospital, 69 Yongding Road, Beijing 100039, People’s Republic of ChinaTel +86-10-57976611Fax +86-10-57976937Email pengbaogan@163.comStudy Design: Retrospective study.Objective: To report the efficacy of anterior cervical surgery for the relief of cervicogenic headache (CEH) caused by cervical spondylosis.Methods: From January 2014 to December 2016, a total of 166 cases of cervical radiculopathy and/or myelopathy received anterior cervical decompression and fusion (ACDF) in our institution, among which 50 cases (mean age 44.7 years) were accompanied by CEH and followed up at 3, 6, 12, and 24 months postoperatively, respectively. Neck pain and headache scores according to neck disability index (NDI) were documented for all patients at regular intervals. The results measured at different follow-up time point were compared statistically.Results: All 50 patients reported neck pain and headache at the same time before surgery. The average NDIs for neck pain before and after surgery were 2.86 (95% CI: 2.7– 3.0) preoperatively, 0.98 (95% CI: 0.8– 1.1) at 3 months, 0.68 (95% CI: 0.5– 0.9) at 6 months, 0.62 (95% CI: 0.5– 0.8) at 12 months, and 0.60 (95% CI: 0.4– 0.8) at 24 months postoperatively, respectively. The average NDIs for CEH before and after surgery were 2.32 (95% CI: 2.2– 2.5) preoperatively, 0.62 (95% CI: 0.5– 0.8) at 3 months, 0.60 (95% CI: 0.4– 0.8) at 6 months, 0.56 (95% CI: 0.4– 0.7) at 12 months, and 0.50 (95% CI: 0.3– 0.7) at 24 months postoperatively, respectively. The neck pain and headache improved in all cases and the NDI score of neck pain or headache at each follow-up point after surgery was significantly different from that before surgery (P < 0.001). The simple correlation analysis between neck pain and headache was performed, and the Pearson coefficient r was 0.71, indicating a positive correlation between neck pain NDI and headache NDI. No serious surgical complications were found.Conclusion: Our study suggests that patients with cervical spondylosis complicated with CEH are always accompanied by neck pain. ACDF can not only relieve neck pain but also improve the accompanying CEH.Keywords: cervicogenic headache, neck pain, cervical spondylosis, anterior cervical decompression and fusion

13X zeolite exhibited high catalytic activity and selectivity in acetylene hydrochlorination at high temperatures above 300 °C. The activity of 13X may be derived from its unique zeolite structure, meanwhile Na+ and the active carbon deposit facilitated acetylene hydrochlorination. This finding presented a promising approach for the development of green non-mercury catalysts.

Introduction. Hemolymphangioma is an extremely rare malformation of the lymphatic and blood vessels. A limited number of hemolymphangioma cases occurring in the pancreas, extremities, spleen, and other organs have been reported until September 2017. To the best of our knowledge, no cases of hemolymphangioma in the occipitocervical region have been reported in the literature. Case Presentation. We reported the case of a 23-year-old male patient with an occipitocervical lesion presenting atypically as neck pain and stiffness over a period of five months. Although hemolymphangioma has historically demonstrated a female predilection (2.25 : 1 female to male) and presentation in the third to fourth decades of life, this case is an atypical manifestation occurring in a young male patient. The clinical characteristics and management choices of this uncommon case of hemolymphangioma in the occipitocervical region are discussed, and a review based on the available literature is also presented. Conclusion. Hemolymphangioma of the occipitocervical region is an uncommon presentation of a rare lesion. Although rare, hemolymphangioma should be considered a differential diagnosis for masses occurring in the occipitocervical region. Complete surgical resection is the treatment of choice and affords a good prognosis.

Traditional energy-saving dispatching is easy to cause spinning reserve centralized distribution, leding to the increase of reserve insecurity. And, it ignores the influence that reserve makes on the target coal consumption. To solve this problem, we Consider wind power, load forecasting error cases, lead into coal saving benefit, as well as power grid loss factor. The integrated goal include unit coal consumption and coal conversion. in order to the reliability of the system, introducing risk indicator, as a constraint, it constructs the model in certain risk situations of optimal reserve distribution. IEEE-RTS24 system was used as numerical cases. Research in the different risk limits required reserve capacity and system coal consumption. Analyze the impact of different factors the system coal consumption and the reserve capacity, As well as certain risk limits on each unit distribution of reserve capacity.