Lumbar Solitary Osteochondroma with Lower Extremity Weakness: A Case Report

Takahiro Sato1, *, Hayato Kinoshita2, Takashi Kobayashi2, Naohisa Miyakoshi1
1 Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita010-8543, Japan
2 Akita Kosei Medical Center, 1-1-1 Nishibukuro Iijima, Akita011-0948, Japan

Article Metrics

CrossRef Citations:
Total Statistics:

Full-Text HTML Views: 687
Abstract HTML Views: 420
PDF Downloads: 385
ePub Downloads: 158
Total Views/Downloads: 1650
Unique Statistics:

Full-Text HTML Views: 409
Abstract HTML Views: 235
PDF Downloads: 221
ePub Downloads: 122
Total Views/Downloads: 987

Creative Commons License
© 2022 Sato et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan; Tel: +81 18-834-1111; E-mail:



Osteochondroma is the most common benign bone tumor. However, osteochondroma of the spine is relatively rare, accounting for only 4% to 7% of primary benign spinal tumors and less than 3% of all osteochondromas. Furthermore, symptomatic osteochondroma in the lumbar spine is much rarer. We herein describe a patient who was diagnosed with a lumbar solitary osteochondroma causing neurological symptoms of the lower extremities. The patient successfully underwent surgical removal of the lesion.

Case Presentation:

A 79-year-old man presented with a 3-year history of difficulty walking and gradual development of numbness in his left upper extremity, which further exacerbated his difficulty walking. Magnetic resonance imaging and computed tomography revealed spinal stenosis at C3/4, L4/5, and L5/S1 and an osseous solitary lesion. We performed a single-stage operation of both the cervical and lumbar spine. The osseous solitary lesion at L5/S1 was removed, and the pathological diagnosis was osteochondroma. After the operation, the patient’s upper extremity numbness and walking ability were improved.


We experienced a rare case of a neurologically symptomatic solitary osteochondroma in the lumbar spinal canal. Moreover, this lesion was found at the same time as cervical spondylosis causing numbness. Therefore, we must perform careful examinations and thoroughly evaluate imaging and postoperative pathological findings.

Keywords: Lumbar spine, Osteochondroma, Lower extremity weakness, Examinations, Pathological, Numbness.