Case ReportsExtradural Dumbbell-shaped Hydatid Cyst of the Thoracolumbar Junction and Paravertebral Region Compressing the Left KidneyTiryaki, Mehmet MD; Süslü, Hikmet T. MD; Çeçen, Dilber Ayçiçek MD; Tatarli, Necati MDAuthor Information Department of Neurosurgery, Dr Lütfi Kirdar Kartal Education and Research Hospital, İstanbul, Turkey The authors declare no conflict of interest. Reprints: Hikmet T. Süslü, MD, Department of Neurosurgery, Dr Lütfi Kirdar Kartal Education and Research Hospital, Şemsi Denizer Cad. E-5 Karayolu Cevizli, Mevkii 34890 Kartal, İstanbul, Turkey (e-mail: firstname.lastname@example.org). Neurosurgery Quarterly: November 2016 - Volume 26 - Issue 4 - p 365-368 doi: 10.1097/WNQ.0000000000000173 Buy Metrics Abstract Although rare, hydatid cyst disease remains a serious parasitic infection in some developing and underdeveloped countries. Radiologically, the appearance of a dumbbell-shaped mass in the spine is highly suggestive of neurofibroma. Extradural spinal hydatid cyst, although very rare, may also have the same appearance. In this report, a case of hydatid cyst disease involving the T11 to L2 vertebrae with extensions through the neural foramina to the adjacent perirenal fascia and compressing the left kidney is presented. The clinical presentation of the patient was a loss of strength in the legs; this patient initially underwent surgery to decompress the spinal cord by laminectomy and posterior stabilization with bilateral T11 and L1 posterior pedicular screw fixation. Then a retroperitoneal approach to excisea paravertebral mass compressing the left kidney was carried out. The serology was positive for hydatid cyst. Hydatid cyst disease should be considered in the differential diagnosis of spinal mass lesions. Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved.