Clinical Report: Case Study of Primary Sclerosing Epithelioid Fibrosarcoma

Overview

This report details a rare case of primary sclerosing epithelioid fibrosarcoma (SEF) located in the iliac fossa of a 53-year-old man. The diagnosis was confirmed through multimodal imaging and histopathological examination, with no evidence of recurrence during short-term follow-up.

Background

Sclerosing epithelioid fibrosarcoma (SEF) is an exceedingly rare and aggressive fibroblastic malignancy, representing less than 1% of all soft tissue sarcomas. Its primary occurrence in the retroperitoneal iliac fossa is exceptionally uncommon, posing significant diagnostic challenges due to overlapping imaging features with other tumors. Accurate diagnosis and management are critical, as SEF is relatively insensitive to chemotherapy and radiotherapy, necessitating radical surgical resection.

Data Highlights

No numerical or trial data available in the article.

Key Findings

• SEF is a rare fibroblastic malignancy with aggressive potential.
• This case represents the second documented instance of SEF in the iliac fossa.
• Imaging features included heterogeneous low density on CT and mixed hyperintensity on MRI.
• Histopathological examination confirmed the diagnosis of SEF.
• No local recurrence or metastasis was observed during 10 months of follow-up.

Clinical Implications

Clinicians should consider SEF in the differential diagnosis of deep-seated soft-tissue masses, especially in atypical locations like the iliac fossa. Accurate preoperative imaging and histopathological confirmation are essential for effective management, as radical surgical resection remains the primary treatment strategy.

Conclusion

This case underscores the importance of recognizing the imaging characteristics of SEF and the necessity for histopathological confirmation in atypical presentations. Continued monitoring is vital to detect any late recurrence or metastasis.

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