Odontogenic myxoma (OM) is a relatively rare, benign odontogenic tumor with locally aggressive behavior, but it is a nonmetastasizing neoplasm of the jaw bones. Although radical resection with an appropriate surgical margin is recommended, emerging evidence has suggested that a more conservative approach will result in acceptable recurrence rates with less morbidity if careful long-term follow-up is provided. A 56-year-old Japanese man with odontogenic myxoma of the left mandible was conservatively treated by surgical enucleation and curettage because he desired functional and cosmetic preservation. During a follow-up period of 100 months, the patient has remained clinically and radiologically free of recurrence. As far as we can ascertain, 20 reports published after 1990 described 37 patients with mandibular OM that had been treated by conservative surgery. Tumors recurred during a mean follow-up of 49.2±42.8 months in 7 (18.9%) patients, and only one of five patients who were followed up for over 100 months developed recurrence. The rate of recurrence decreased from 24.0% to 8.3% when follow-up exceeded 60 months. Although enucleation and curettage have proven effective, the risk of recurrence remains considerable and long-term follow-up is indispensable. More evidence of long-term outcomes after conservative surgery for OM is needed.

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Metastatic lung tumours rarely lead to development of pneumothorax, and no case of bilateral secondary pneumothorax due to lung metastases arising from tongue cancer has been reported. Here, we report a case of a patient with tongue cancer with lung metastases complicated by bilateral secondary pneumothorax soon after the completion of concurrent chemoradiotherapy. A 39-year-old man with cervical lymph node metastases originating from pT2N0M0 tongue cancer underwent neck dissection and postoperative concurrent chemoradiotherapy. Shortly after the completion of chemoradiotherapy, he developed bilateral secondary pneumothorax. Subsequently, he underwent partial lung resection for the pulmonary fistulae for diagnostic and therapeutic purposes; nodular lesions found in both the lungs. The diagnosis of secondary pneumothorax was based on histopathological findings. Although all pulmonary fistulae disappeared after partial lung resection, he died of the primary disease despite our best efforts to control the metastatic pulmonary lesions.

Background: Cervical schwannoma is a relatively rare disease, and it is difficult to experience many surgical cases because it may be followed up without surgery. We examined 100 patients who underwent inter-capsular resection for cervical schwannomas at our center and classified the patients according to the nerve of origin. Methods: We retrospectively reviewed 100 patients who underwent inter-capsular resection for cervical schwannoma at our center from April 2005 to September 2019. We examined the patient's characteristics including age, sex, tumor size (maximum diameter), origin nerve, preoperative symptoms, and postoperative neurological deficits for all cases. We classified the cases according to the nerve of origin and the occurrence of postoperative neurological deficits. Results: The occurrence of postoperative neurological deficit for all cases was as follows: "none" was 73%, "temporary paralysis" was 21%, and "permanent paralysis" was 6%. In the case of vagus nerve: "none" was 65.4%, "temporary paralysis" was 23.1%, "permanent paralysis" was 11.5%. In the case of sympathetic nerve: "none" was 64.7%, "temporary paralysis" was 29.4%, "permanent paralysis" was 5.9%. In the case of brachial plexus: "none" was 87.0%, "temporary paralysis" was 13.0%, "permanent paralysis" was 0%. In the case of cervical and accessory nerves: "none" was 86.4%, "temporary paralysis" was 13.6%, "permanent paralysis" was 0%. In the case of facial nerve: "none" was 0%, "temporary paralysis" was 80.0%, "permanent paralysis" was 20%. In the case of lingual nerve: "none" was 80.0%, "temporary paralysis" was 20.0%, "permanent paralysis" was 0%. Conclusions: Inter-capsular resection is useful for the treatment of cervical schwannoma and a simple comparison is difficult, but probably with good