TY - JOUR
AR - SCR-2021-1-106
TI - Spinal Intraosseus Schwannoma: A Case Report
AU - Giorgio , Spatola
AU - Migliorati , Karol
AU - Liserre , Barbara
AU - Morassi , Mauro
AU - Giudice , Lodoviga
AU - Fazio , Marco
AU - Vivaldi , Oscar
AU - Franzin , Alberto
JO - Surgical Case Reports
PY - 2021
DA - Fri 15, Jan 2021
SN - 2613-5965
DO - http://dx.doi.org/10.31487/j.SCR.2021.01.06
UR - https://www.sciencerepository.org/spinal-intraosseus-schwannoma-a-case-report_SCR-2021-1-106 
KW - Intraosseous schwannoma, spinal schwannoma, neurosurgery
AB - Introduction: Schwannomas are the most frequent extramedullary intradural spinal tumors, accounting for
approximately 24% of all nerve sheath tumors in adults. In a lower percentage of cases they may be
extradural or transdural (1-19%). Intramedullary schwannomas and intraosseous schwannoma are quite rare
tumors representing.
Case Description: A 74-year-old woman presented intense low back pain for a few months, associated with
left cruralgia and dysesthesia spread to both lower limbs. Magnetic resonance and computed tomography
examination demonstrated an extramedullary intradural osteolytic lesion located in the posterior part of the
vertebral body and pedicles of L1. The patient underwent a first surgery 4 years earlier with complete
removal of the tumor but after about two years she had a recurrence. She was then subjected to a new
intervention of decompression, removal of the tumor and arthrodesis. The histological findings were
compatible with a classical schwannoma characterized by intraosseous growth and multifocal bone
infiltration.
Conclusion: We reported a rare case of intraosseous schwannoma presenting as a recurrence four years
after radical surgical removal of a classic lumbar schwannoma. Only 25 cases of these tumors have been
previously reported and none of them as an intraosseous recurrence.