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Solitary giant neurofibroma of the knee: a case report

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Introduction: Solitary neurofibroma is a rare tumor that occurs particularly in the head and trunk. It is mostly small and rarely exceeds 2 cm. Case Report: A 61-year-old female patient… Click to show full abstract

Introduction: Solitary neurofibroma is a rare tumor that occurs particularly in the head and trunk. It is mostly small and rarely exceeds 2 cm. Case Report: A 61-year-old female patient complained about an increasingly extended mass with pain in the right knee for about 14 months. Physical examination reveals a big, solid mass in front of the medial condyle, measuring about 14×12 cm. Tinel’s sign was positive on mass percussion. MRI showed a well-circumscribed oval mass with low signal on T1 and high signal on T2-weighted images. A surgical biopsy was performed, and immunohistochemistry confirmed the diagnosis of solitary neurofibroma. Surgical excisions were performed with good outcomes. Discussion: A giant solitary neurofibroma is exceptional. The knee location is even rarer. Immunohistochemistry is the only way to confirm the diagnosis. Conclusion: Giant neurofibromas need a complete surgical excision. Until today, there were no other alternative therapies for these tumors.

Keywords: case report; knee; mass; neurofibroma

Journal Title: Annals of Medicine and Surgery
Year Published: 2023

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