Multiple Schwannomas in sciatic nerve, a rare case report

Background : Schwannomas are the most common nerve sheath tumor and they are usually solitary enucleated lesions. Multiple schwannomas are a rare circumstance which may occur with or without other manifestation of neurofibromatosis. Methods: In this study we report a 45 years old man presenting with pain and swelling in the thigh and popliteal space without any manifestation of neurofibromatosis or neurologic problems. We performed surgery and we found four separated tumor in sciatic nerve which was characteristic for schwannoma and confirmed by pathologic findings. Conclusion: While multiple schwannomas frequently associated with neurofibromatosis, the current case reveal a patient with multiple schwannomas without manifestations of neurofibromatosis.