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CT scanning demonstrated osteophyte formation at the anterior aspect of the vertebral body. MRI showed a forward migration of the spinal cord with a ratio (C\/M ratio) between the anteroposterior diameter of the medulla-pons junction and the spinal cord at the apex of the kyphosis of 0.27. After 2 weeks of preoperative halo-gravity traction, anterior release and posterior fusion was performed. After surgery, cervical kyphosis was corrected to 0\u00b0, and cervical myelopathy improved. One year after surgery, the patient was neurologically intact, and bony union and improved cervical alignment were observed. Preoperative halo-gravity traction followed by combined anterior-posterior surgery led to safe and effective correction. Osteophyte formation at the anterior aspect of the vertebral body and the C\/M ratio were useful in predicting the progression of AICK.<\/jats:p>","DOI":"10.3171\/2018.11.spine18988","type":"journal-article","created":{"date-parts":[[2019,2,27]],"date-time":"2019-02-27T01:12:26Z","timestamp":1551229946000},"page":"783-787","source":"Crossref","is-referenced-by-count":6,"title":["Acute progressive adolescent idiopathic cervical kyphosis: case report"],"prefix":"10.3171","volume":"30","author":[{"given":"Yuki","family":"Yamamuro","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Satoru","family":"Demura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hideki","family":"Murakami","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Satoshi","family":"Kato","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noritaka","family":"Yonezawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noriaki","family":"Yokogawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroyuki","family":"Tsuchiya","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"key":"b1","series-title":"Spine (Phila Pa 1976)","doi-asserted-by":"publisher","first-page":"2389","DOI":"10.1097\/00007632-199911150-00017","article-title":"Correction of cervical kyphosis using pedicle screw fixation systems","volume":"24","author":"Abumi K","year":"1999","unstructured":"Abumi K, Shono Y, Taneichi H, Ito M, Kaneda K: Correction of cervical kyphosis using pedicle screw fixation systems. 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