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Primary malignant peripheral nerve sheath tumor of the cauda equina in a child case report
1Department of Orthopaedic Surgery, Kagoshima Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
Insights
Primary malignant peripheral nerve sheath tumors (MPNSTs) in the cauda equina of children have a poor prognosis. Aggressive treatment including surgery and radiation may be necessary, but outcomes remain challenging.
Area of Science:
- Pediatric Oncology
- Neurosurgery
- Orthopedic Surgery
Background:
- Malignant peripheral nerve sheath tumors (MPNSTs) are rare and aggressive neoplasms.
- Intradural MPNSTs of the cauda equina in children are exceptionally uncommon.
Observation:
- A case report details a 4-year-old boy with an intradural MPNST of the cauda equina presenting with low-back pain.
- Initial treatment involved surgical resection, followed by chemotherapy and radiation due to recurrence and metastasis.
Findings:
- Despite multimodal treatment, the patient experienced local recurrence, distant metastases, and ultimately succumbed to the disease.
- Clinical outcomes for primary intradural MPNSTs in pediatric patients are historically poor.
Implications:
- This case highlights the challenges in managing pediatric intradural MPNSTs.
- Combined surgical resection and high-dose postoperative radiation may offer the best, though still limited, therapeutic option.
Study Design:
A case report of primary malignant peripheral nerve sheath tumor (MPNST) of the cauda equina in a child is presented, and the literature is reviewed.
Objective:
To discuss the problems involved in the treatment of primary intradural MPNSTs.
Setting:
A department of orthopaedic surgery in Japan.
Methods:
A 4-year-old boy complained of low-back pain radiating to the left calf. MRI revealed an intradural tumor at L3-L5 level. Following laminectomy of L3, L4 and L5, the tumor was removed en bloc. Based on pathological and immunohistological findings, the tumor was diagnosed as an MPNST.
Results:
Although adjuvant chemotherapy was administered local recurrence and cerebral and spinal metastases of the tumor were found 6 months after the operation. Following additional incomplete removal of the recurrent tumor, radiation therapy was administered. Although recurrent and metastatic tumors disappeared or diminished in size by radiation, tumors increased in size thereafter, despite additional adjuvant chemotherapy. At 21 months after the first operation, he died of pneumonia.
Conclusions:
Reported clinical outcomes for patients with primary intradural MPNST are very poor. Although no gold standard for the treatment of tumors has been established yet, surgical removal of tumors combined with postoperative high-dose radiation may be recommended.