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Intrathoracic paraspinal malignant peripheral nerve sheath tumor
Ruay-Sheng Lai1, Shong-Ling Lin, Shu-Shong Hsu
1Division of Chest Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, ROC. rslai@vghks.gov.tw
Journal of the Chinese Medical Association : JCMA
|February 2, 2006
Summary
Malignant peripheral nerve sheath tumors (MPNSTs) are rare in the posterior mediastinum. This case highlights a delayed diagnosis of MPNST, emphasizing the need for accurate diagnosis and treatment.
Area of Science:
- Oncology
- Neurosurgery
- Radiology
Background:
- Schwannomas are common posterior mediastinum nerve sheath tumors, but malignant peripheral nerve sheath tumors (MPNSTs) are rare.
- Clinical and radiographic differentiation between benign and malignant nerve sheath tumors is challenging.
- MPNSTs present with hypercellularity, nuclear atypia, and mitotic activity histologically.
Observation:
- A 50-year-old female presented with a posterior mediastinal mass, experiencing a 2-year diagnostic delay.
- Initial radiographic findings were not definitive for MPNST.
- Histological examination post-surgical intervention confirmed MPNST.
Findings:
- Surgical resection is the primary treatment for MPNST.
- Postoperative radiation therapy significantly reduced local recurrence rates.
- The patient received postoperative radiation due to incomplete resection, showing a reduced residual mass on follow-up CT.
Implications:
- Accurate and timely diagnosis of MPNST is crucial for effective management.
- Multimodal treatment including surgery and radiation therapy improves outcomes.
- MPNSTs, despite aggressive treatment, carry an unfavorable prognosis.