Recurrent malignant fibrous histiocytoma of the forearm: A rare soft tissue sarcoma: Recurrent malignant fibrous histiocytoma

Kağan Gökçe; Demet  Doğan; Merve  Yazıcı; Ayşe Nimet  Karadayı; Ahmet  Midi

doi:10.28982/josam.7873

Authors

Kağan Gökçe Okan University, Faculty of Medicine, Department of Surgery, Surgical Oncology Unit, İstanbul, Turkey https://orcid.org/0000-0003-4712-0512
Demet Doğan Okan University, Faculty of Medicine, Department of Radiology, İstanbul, Turkey https://orcid.org/0000-0003-0792-9042
Merve Yazıcı Okan University, Faculty of Medicine, 3rd Grade Student, İstanbul, Turkey https://orcid.org/0009-0002-0935-0114
Ayşe Nimet Karadayı Okan University, Faculty of Medicine, Department of Pathology, İstanbul, Turkey https://orcid.org/0000-0001-8659-2155
Ahmet Midi Bahcesehir University, Faculty of Medicine, Department of Pathology, İstanbul, Turkey https://orcid.org/0000-0002-6197-7654

DOI:

https://doi.org/10.28982/josam.7873

Keywords:

malignant fibrous histiocytoma, soft tissue sarcoma, magnetic resonance

Abstract

Malignant fibrous histiocytoma (MFH), while rare, is the most prevalent soft tissue sarcoma (STS) found in extremities. Its prognosis hinges on factors such as tumor size, invasion depth, and differentiation degree. For MFH and all STSs, wide surgical resection is the gold standard treatment method. In this study, a 48-year-old woman, initially diagnosed with lipoma and with a mass excised from her right forearm, later exhibited recurring MFH masses in the same location. Superficial tissue ultrasonography identified malignant soft tissue tumors in the lesion area. Positron emission tomography was used to stage the tumor preoperatively, revealing fluorodeoxyglucose uptake in the repeating lesions. Right forearm magnetic resonance imaging confirmed the malignant lesions. Post imaging, the patient underwent wide surgical excision, eliminating the fascia. Regular follow-up revealed no recurrence or metastasis at 6 months and 1 year. Excisions frequently occur without radiological imaging, based only on a preliminary lipoma or sebaceous cyst diagnosis. However, excisions should follow radiological imaging, particularly when soft tissue tumors beneath the skin appear benign.

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