口腔内転移をきたした悪性神経鞘腫の１例

Abstract

Malignant schwannoma arises from the peripheral nervous system. Many of them arise in the leg and arms, and few arise in the oral region. Moreover, there are few reports of schwannoma metastasizing to the oral region from other regions. We report a case of malignant schwannoma that metastasized to the left mandibular gum from the right leg. The patient was a 45-year-old man. On examination, a malignant tumor of unknown origin was discovered, and it had metastasized to bone. On July 8, 1994, a widespread excision of the right leg with, right THA and TKA was carried out. The pathologic diagnosis was a malignant schwannoma; the origin was the right inguinal region. On February 27, 1995, the patient was hospitalized in the internal madicine department because of obstructive jaundice. The left lower gum had swollen considerably. On March 23, he visited our department. The clinical diagnosis was a hem atoma. On March 29, the tumor was removed with the patient under local anesthesia. The pathologic diagnosis was a malignant schwannoma that had metastasized to the oral region. His condition progressively worsened, and he died on April 10.