Clinical Focus

  • Neurosurgery

Academic Appointments

Professional Education

  • Residency: Riverside University Health System Neurosurgery Re (2022) CA
  • Internship: Riverside University Health System Neurosurgery Re (2016) CA
  • Medical Education: Lake Erie College of Osteopathic Medicine (2015) PA

All Publications

  • Radiolucent carbon fiber-reinforced implants for treatment of spinal tumors- clinical, radiographic, and dosimetric considerations. World neurosurgery Takayanagi, A., Siddiqi, I., Ghanchi, H., Lischalk, J., Vrionis, F., Ratliff, J., Bilsky, M., Hariri, O. R. 2021


    The management of spine tumors is multimodal and personalized to each individual patient. Patients often require radiation therapy after surgical fixation. While titanium implants are used most commonly, they produce significant artifact, leading to decreased confidence in target-volume coverage and normal tissue sparing. Carbon-based materials have been found to have minimal effects on dose-perturbation in postoperative radiation therapy while demonstrating biostability and biocompatibility that is comparable to titanium implants. We conducted a systematic review on carbon-based screw and rod fixation systems in the treatment of spinal tumors utilizing Pubmed and Web of Sciences databases. We reviewed clinical studies with regards to safety of spine fixation with carbon fiber reinforced (CFR) implants, biomechanical studies, as well as radiation and dosimetric studies. The radiolucency of CFR-PEEK implants has potential to benefit spine tumor patients. Clinical studies have demonstrated no increase in complications with implementation of CFR-PEEK implants, and these devices appear to have sufficient stiffness and pullout strength. However, further trials will be necessary in order to determine if there is a clinically significant impact on local tumor control.

    View details for DOI 10.1016/j.wneu.2021.05.100

    View details for PubMedID 34062294

  • Cervical osteochondroma: surgical planning. Spinal cord series and cases Fowler, J. n., Takayanagi, A. n., Siddiqi, I. n., Ghanchi, H. n., Siddiqi, J. n., Veeravagu, A. n., Desai, A. n., Vrionis, F. n., Hariri, O. R. 2020; 6 (1): 44


    Osteochondromas are benign bone tumors which occur as solitary lesions or as part of the syndrome multiple hereditary exostoses. While most osteochondromas occur in the appendicular skeleton, they can also occur in the spine. Most lesions are asymptomatic however some may encroach on the spinal cord or the nerve roots causing neurological symptoms. While most patients with osteochondromas undergo laminectomy without fusion, laminectomy with fusion is indicated in appropriately selected cases of spinal decompression.We present a case of a 32-year-old male with history of multiple hereditary exostoses who presented with symptoms of bilateral upper extremity numbness and complaints of gait imbalance and multiple falls. He reported rapid progression of his symptoms during the 10 days before presentation. Computed tomography of the cervical spine revealed a lobulated bony tumor along the inner margin of the cervical 4 lamina. He underwent cervical 3 and 4 laminectomies, partial cervical 2 and 5 laminectomies and cervical 3-5 mass screw placement. Pathology was consistent with osteochondroma. The patient's symptoms had markedly improved at follow-up.According to our literature review, osteochondromas most commonly occur at cervical 2 and cervical 5. We present a case of an osteochondroma at a less common level, cervical 4. While most osteochondromas are addressed with laminectomy without arthrodesis, the decision of whether arthrodesis is necessary should be considered in all patients with osteochondroma as with any cervical decompression.

    View details for DOI 10.1038/s41394-020-0292-7

    View details for PubMedID 32467563

  • Multiple Extradural Spinal Meningiomas in a Patient with Acquired Immunodeficiency Syndrome: Case Report and Literature Review. World neurosurgery Ghanchi, H. n., Hariri, O. R., Takayanagi, A. n., Li, G. n. 2018

    View details for PubMedID 29966786