Open and Closed Reduction of Temporomandibular Joint Dislocation due to Tongue Cancer Operation / 대한이비인후과학회지

Temporomandibular Joint (TMJ) dislocation due to tongue cancer operation has a potential risk factor in that it may become a chronic anterior dislocation. In this regard, the treatment methods of TMJ dislocation are more complicated than that of the usual manual reduction therapy. To prevent the reduction procedure from becoming more complicated, clinicians should check the TMJ status afterward the head and neck operations. But, even with caution, chronic dislocation can happen. To restore normal jaw relation in these patients, one can be treated by manual reduction, open surgery under general anesthesia, and by fastening of additional intermaxillary fixations. Here we report two successfully treated cases of TMJ dislocations due to tongue cancer operation, one treated by the conservative method, and the other by the open surgery method.

A Case of Liposarcoma Arising in Tracheoesophageal Groove / 대한이비인후과학회지

Liposarcoma is the second most common soft tissue sarcoma in adult, after malignant fibrous histiocytoma. But, the incidence of liposarcoma in the head and neck malignancies is approximately 1.8-6.3%. Primary liposarcoma of the thyroid gland is exceedingly rare with only six previous reports in the English literature. We report a case of liposarcoma in a 61-year-old male who had been misdiagnosed with thyroid nodule and follicular neoplasm suspected in fine needle aspiration cytology. Mass excision of the liposarcoma was performed. During the preoperative evaluation and operation, the author recognized that the tumor had origina-ted not from the thyroid gland, but from the tracheoesophageal groove. The histopathological examination revealed a combination type liposarcoma that was both well differentiated and myxoid. But a paramedian fixation was found in the left vocal cord palsy and injection la-ryngoplasty was performed. Postoperatively, radiotherapy was given to the neck region. Dur-ing the 36-month follow-up period, there was no evidence of the disease.