Work

Malignant peripheral nerve sheath tumor mimicking post-traumatic hematoma: A case report

Year: 2025

Type: article

Abstract: Malignant peripheral nerve sheath tumors (MPNSTs) are rare and aggressive soft tissue sarcomas that can mimic benign lesions. We report the case of a 44-year-old man who developed progressive swelling of the left thigh following a motorcycle accident two months earlier. The initial clinical impression was a post-traumatic hematoma; however, aspiration yielded no fluid. Ultrasonography revealed an irregular, heterogeneous lesion with cystic areas. No vascular flow was detected on color Doppler imaging, whereas superb microvascular imaging (SMI) demonstrated irregular, low-velocity microvascular signals within the solid components. Magnetic resonance imaging (MRI) showed heterogeneous signal intensity, diffusion restriction, heterogeneous enhancement, and extension into the adjacent muscle compartments. Histopathological and immunohistochemical analyses (focal S-100 and Desmin positivity) confirmed a diagnosis of high-grade MPNST. This case emphasizes the importance of considering malignancy in persistent or enlarging post-traumatic soft tissue lesions. Combined evaluation with SMI and MRI may enhance early suspicion of malignancy, enabling timely diagnosis and appropriate patient management.

Source: Radiology Case Reports

DOI: 10.1016/j.radcr.2025.10.084

Authors: Adil Aytaç, Uğur Dönmez, Bahar Yanık Keyik

Institution: Balıkesir University

Language: English

Topic: Neurofibromatosis and Schwannoma Cases

Subfield: Neurology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $600