Hybrid Schwannoma/Neurofibroma of the Neck: A Case Report.

ABSTRACT

Neck hybrid schwannoma/neurofibromas are uncommon and classified as peripheral nerve sheath tumors (PNSTs). PNSTs develop from soft tissues, of which schwannoma, perineurioma, and neurofibroma are the most common. Hybrid PNSTs consist of more than 1 type of PNST, such as hybrid schwannoma/neurofibromas. The exact epidemiology and pathogenesis of these tumors are still largely unknown because of the limited studies on this topic. Such tumors can spread over the soft tissues, although most cases reported involve the subcutaneous layer or dermis. Some studies have suggested that hybrid schwannoma/neurofibromas may be associated with neurofibromatosis. We present a case of a 51-year-old female patient with a neck hybrid schwannoma/neurofibroma diagnosed by histopathology and immunohistochemistry. The patient was referred to the neurology department for neurofibromatosis screening, which reported negative results. After 12 months, the patient showed no evidence of tumor recurrence.