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Myelopathy in a 16-year-old girl

2017, Journal of Clinical Neuroscience

The differential diagnoses may include ABC or other solid bone tumors such as osteosarcoma, giant cell tumor, chondroblastoma, Fig. 2. Postoperative cervical spine lateral (A) and anteroposterior views (B) demonstrating the reconstruction of C6 with solid fixation and fusion.

Journal of Clinical Neuroscience 44 (2017) 358–359 Contents lists available at ScienceDirect Journal of Clinical Neuroscience journal homepage: www.elsevier.com/locate/jocn Images in Neuroscience: Answer Myelopathy in a 16-year-old girl Chih-Ying Wu a, Jeng-Hung Guo a, Der-Yang Cho a,b,c, Guan-Chin Tseng d, Der-Cherng Chen a,⇑ a Department of Neurosurgery, China Medical University Hospital, China Medical University, No. 2 Yu-Der Road, Taichung 40402, Taiwan Department of Neurosurgery, Stroke Center, Center for Neuropsychiatry, China Medical University Hospital, No. 2 Yu-Der Road, Taichung 40402, Taiwan c Graduate Institute of Immunology, China Medical University, No. 2 Yu-Der Road, Taichung 40402, Taiwan d Department of Pathology, China Medical University Hospital, China Medical University, No. 2 Yu-Der Road, Taichung 40402, Taiwan b 1. Answer B. S-ABC. 2. Discussion The differential diagnoses may include ABC or other solid bone tumors such as osteosarcoma, giant cell tumor, chondroblastoma, Fig. 2. Postoperative cervical spine lateral (A) and anteroposterior views (B) demonstrating the reconstruction of C6 with solid fixation and fusion. DOI of question: http://dx.doi.org/10.1016/j.jocn.2017.03.050 ⇑ Corresponding author. Fax: +886 4 2234 4055. E-mail address: cmuhns1@gmail.com (D.-C. Chen). http://dx.doi.org/10.1016/j.jocn.2017.03.052 0967-5868/Ó 2017 Elsevier Ltd. All rights reserved. C.-Y. Wu et al. / Journal of Clinical Neuroscience 44 (2017) 358–359 359 Fig. 3. Blood-filled cystic spaces separated by fibrous tissue (Hematoxylin and eosin, 20) (A). Septa are composed of fibroblasts and scattered osteoclast-like giant cells and focal osteoid production. No cellular atypia can be observed (Hematoxylin and eosin, 100) (B). and chondromyxoid fibroma. Even if we could perform biopsy preoperatively to reach a diagnosis, gross total resection, and cervical fixation and fusion were still needed because of the progressing myelopathy and cervical instability. Thus, we performed posterior surgical gross total excision and screw fixation over C5 and C7 (Fig. 2). The lesion was well-demarcated from the adjacent dura. The permanent histopathological examination revealed bloodfilled cystic spaces separated by fibrous tissue. Septa were composed of fibroblasts, scattered multinucleated osteoclast-like giant cells, and focal osteoid production. No cellular atypia was found. The S-ABC was confirmed (Fig. 3). At the 12-month follow-up, no recurrence was found. She had no limb paresthesia, no limb weakness, and could walk without assistance. No other adjuvant therapy was needed. ABC is a pseudotumoral, blood-filled lesion of unknown etiology that has a blowout radiographic appearance [1]. S-ABC, first described in 1983, is a variant of ABC [2]. S-ABC is extremely rare in the cervical region, and like the conventional ABC, almost all S-ABC cases originated from the posterior elements of the vertebra [3]. On radiological examination, S-ABC may be difficult to differentiate from conventional ABC, telangiectasic osteosarcoma, and lytic expansile destructive bone lesions such as osteosarcoma, giant cell tumor, chondroblastoma, and chondromyxoid fibroma. Fine-needle biopsy could be useful in making a diagnosis, but in lesions with a major hemorrhagic component, fine-needle biopsy can be inaccurate [3]. Thus, open biopsy is more acceptable for definite diagnosis. The standard treatment in cervical S-ABC is still complex and controversial. The treatments include surgical resection, radiation, embolization, sclerotherapy, and cryotherapy. The best treatment for reducing local recurrence is total surgical resection. Our treatment goal is surgical decompression, specimen collection, and solid fixation and fusion to prevent post-laminectomy kyphosis. S-ABC is a benign disease but behaves aggressively, especially when the vertebral artery and a damaged cervical bony structure are involved [3,4]. Therefore, besides surgical resection, cervical architecture reconstruction with solid fixation and fusion should be considered. References [1] Mankin HJ, Hornicek FJ, Ortiz-Cruz E, et al. Aneurysmal bone cyst: a review of 150 patients. J Clin Oncol 2005;23:6756–62. [2] Sanerkin NG, Mott MG, Roylance J. An unusual intraosseous lesion with fibroblastic, osteoclastic, osteoblastic, aneurysmal and fibromyxoid elements: ‘‘solid” variant of aneurysmal bone cyst. Cancer 1983;51:2278–86. [3] Karampalis C, Lenthall R, Boszczyk B. Solid variant of aneurysmal bone cyst on the cervical spine of a child: case report, differential diagnosis and treatment rationale. Eur Spine J 2013;22:523–31. [4] Casabianca L, Journé A, Mirouse G, et al. Solid aneurysmal bone cyst on the cervical spine of a young child. Eur Spine J 2015;24:1330–6.