Facial nerve neurinoma is less common than trigeminal nerve and acoustic nerve neurinomas. Recently, reported cases of facial nerve neurinoma have increased due to progress in the diagnostic imaging. We report two cases of facial nerve neurinoma. Case 1 is a 45-year-old man. In June, 1997, he noted dripping of water from the right side of his mouth. A complete right facial palsy was observed on his first visit. He was diagnosed as having facial nerve neurinoma with CT, MRI and a biopsy with a fine needle aspiration. Case 2 is a 64-year-old man. In September, 1998, he noticed disturbance of right facial mov ement. A complete facial palsy developed upon his first visit. He was diagnosed as having facial nerve neurinoma with CT, MRI and a biopsy with a fine needle aspiration. Even though facial nerve neurinoma is a benign tumor, CT findings are not consistent and hard to interpret. MRI provides images more compatible with neurinoma. We concluded that MRI is a valuable addition to diagnose facial nerve neurinoma.

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The case report of the patient with what is called primary paranasal cyst, who had no history of nasal operation or facial injury was rare. Still more, the case of bilateral primary paranasal cysts was much rare. The patient was 74 years old female, and had the symptom of left nasal obstruction and diplopia. She underwent the operation of endoscopic sinus surgery. The histological finding of the cysts contained nasal gland, fibrous tissue, venous plexus, and chronic inflammatory cells infiltration in the submucosa. These findings corresponded to that of chronic sinusitis. At the surface of the mucosa there was squamous stratified epitherium or no epitherial component. As the existence of chronic inflammatory cells, ciliary epitherium might have degenerated to squamous epitherium. Furthermore there is no dental relative finding on the cysts' wall, both of these cysts were considered to be primary cysts.

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The purpose of this study is to know the detailed relationship between the treatment outcome of epithelial hyperplasia of the larynx and the laser surgery. Of 91 patients with epithelial hyperplasia, whitish coating on the laryngeal wound disappered within three months after the operation in 59 patients whereas it persisted more than three months in 32 patients. Of 59 patients a carcinoma appered in one patients while of 32 patients 11 patients showed carcinoma (p< 1 %), suggesting that when whitish coating on the laryngeal wound persisted more than three months after the operation some additional treatment would be necessary. This disappearance or persistence of whitish coating had no significant relationship with smoking or histopathological findings. The detailed observation of techniques during the laser surgery suggested that the hyperplastic lesion should be removed with the use of scalpel, having an enough safety margin, followed by laser cauterization of the resection stump.

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Olfactory neuroblastoma is a rare tumor. The tumors usually occur in the roof of the nasal cavity, and invade the paranasal sinuses. CT and MRI provide the imf ormation about the tumors and this local invasion. However, definite diagnosis can only be established by histopathology, because specific imaging characteristics do not exist. As to treatment, radical surgery, which may require a combined craniof acial approach, should be choiced. We treated a 55-year-old female with olfactory neuroblastoma. Her compliant was hyposmia. A tumor was found in the right nasal cavity. Intracranial infiltration was demonstrated by detail examinations. Patients with intracranial infiltration have an extremely poor prognosis. We performed chemotherapy, but it was not effective. Craniof acial surgery was performed and the tumor was totally removed. There has been no recurrence of the tumor for more than 2 years after surgery.

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