Primary malignant peripheral nerve sheath tumor at unusual location

Area of Science:

• Oncology
• Surgical Pathology
• Sarcoma Research

Background:

• Malignant peripheral nerve sheath tumors (MPNSTs) are rare soft tissue sarcomas, typically originating near major nerve trunks in the limbs or trunk.
• Unusual anatomical locations for MPNSTs are infrequently documented in medical literature.

Purpose of the Study:

• To review and analyze previously reported cases of MPNSTs occurring in rare anatomical sites.
• To present two novel cases of MPNSTs in unusual locations and detail their management and outcomes.
• To consolidate information on the surgical treatment, adjuvant therapies, and patient outcomes for these rare presentations.

Main Methods:

• Comprehensive literature review of all reported MPNST cases in unusual body parts.
• Clinical case series detailing two patients with MPNSTs in the orbitotemporal and paraspinal regions.
• Analysis of tumor site, surgical intervention, adjuvant treatment protocols, and follow-up data.

Main Results:

• The review identified various rare sites for MPNST occurrence.
• The two presented cases, initially resembling neurofibroma, showed rapid progression.
• Both patients underwent successful gross total tumor removal followed by adjuvant radiotherapy, with no recurrence at 6-month follow-up.

Conclusions:

• MPNSTs can occur in rare anatomical locations, presenting diagnostic challenges.
• Aggressive surgical resection combined with adjuvant radiotherapy appears effective in managing these rare MPNSTs.
• Early recognition and prompt treatment are crucial for favorable outcomes in MPNST patients.