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P. O’Donnell, R. Tirabosco, S. Vujovic, W. Bartlett, T. W. Briggs, S. Henderson, et al., “Diagnosing an Extra-Axial Chordoma of the Proximal Tibia with the Help of Brachyury, a Molecule Required for Notochordal Differentiation,” Skeletal Radiology, Vol. 36, No. 1, 2007, pp. 59-65. doi:10.1007/s00256-006-0167-4

has been cited by the following article:

• TITLE: Chordomas and Their Consideration in the Radiographic Differential of Extra-Axial Lesions of the Central Nervous

  AUTHORS: Shih-Shan Lang, Jayesh P. Thawani, Anousheh Sayah, Sriram Venneti, Danielle Brewington, Eric L. Zager, Stephen J. Dante

  KEYWORDS: Chordoma; Primitive Notochord Tumor; Extra-Axial Tumor; Spine

  JOURNAL NAME: Open Journal of Modern Neurosurgery, Vol.2 No.3, July 19, 2012

  ABSTRACT: Due to the rare occurrence of chordomas extra-axially, these lesions have not earned a great deal of consideration in the clinical and radiographic differential diagnoses of extra-axial paraspinal lesions. We describe a case of a patient with a surgically resected extra-axial chordoma and review the radiologic characteristics of chordomas as an entity in the spectrum of extra-axial lesions. A 47-year-old man presented to our institution with four months of intermittent parethesias, pain, and subjective weakness in the left leg. MR imaging of the lumbar spine demonstrated a large heterogeneously- enhancing paraspinal lesion extending from the left L3-4 neural foramen into the psoas muscle. The patient underwent a CT-guided needle biopsy demonstrating features consistent with a chordoma. He then underwent a left retroperitoneal approach and en bloc resection of the lesion from the vertebral column. Pathology confirmed chordoma as the diagnosis. EACs are a rare but important consideration in the diagnosis of extra-axial lesions of the central nervous system.