Laryngeal Chondrosarcoma Arising from the Cricoid Cartilage / 대한이비인후과학회지

Laryngeal chondrosarcoma is an uncommon cartilaginous tumor very rarely encountered in the head and neck but most commonly in the sarcoma of the larynx. They occur most often in middle aged and older men. The prognosis of this tumor is potentially poor and surgical resection is generally recommended for the treatment. No benefit of chemotherapy or radiotherapy in chondrosarcoma has been documented in the literature. A 57 year-old male visited our clinic with history of dyspnea and hoarseness. Direct laryngoscopy showed a submucoid, intraluminal mass in subglottic space arising from posterolateral part of the cricoid cartilage. Neck computed tomography revealed a large calcified mass in the larynx. The perioperative frozen section showed it to be grade I chondrosarcoma of the cricoid cartilage. Conservative surgery with complete excision of tumor was performed through laryngofissure approach after tracheostomy. Follow up assesment was performed under close check up at 12 months after the surgery, but we found neither recurrence nor metastasis.

Enterococcal Otogenic Brain Abscess / 대한이비인후과학회지

Despite advances in imaging and antibiotic treatment, brain abscess is still encountered occasionally and is one of the most significant life-threatening complications of otologic disease. Nowadays, mortality rates of up to 10 percent have been reported. Brain abscesses are developed up to 0.5 percent of cases of acute otitis media and 3 percent of cases of chronic suppurative otitis media. In this case, underlying middle ear pathology showed chronic otitis media with cholesteatoma. Successful management of otogenic brain abscess still includes medical and surgical treatment. Initial surgical treatment of abscess is very controversial today. Some authors prefer the surgical excision of brain abscess prior to the management of temporal bone, yet other authors prefer the surgery of temporal bone prior to the management of brain abscess. Although an enterococcus is a significant cause of human infections outside of the central nervous system but, enterococcal infections involving the central nervous system are uncommon clinical entities. Because of the relatively small number of individuals who develop brain abscess or meningitis due to an enterococcus, an appropriate therapy has not been well defined. We report a case of enterococcal otogenic brain abscess which was treated successfully using antibiotics, immediate radical mastoidectomy and later stereotactic abscess drainage with a review of literatures.

Two Cases of Neurilemmoma of the Cervical Vagus Nerve Including IntracapsularEnucleation of Nerve Preservation / 대한이비인후과학회지

Neurilemmomas is benign tumor originating from all kinds of cranial nerve except optic nerve and olfactory nerve, spinal nerve root and peripheral nerve. It superficially resembles neoplasm of fibroblastic origin, but has distinctive histological pattern and arise from the neuroectodermal sheath of schwann. Approximately 25% to 40% of all neurilemmomas are found in the neural structure of the head and neck. The tumor mostly develops in the acoustic nerve and there are several reports of neurilemmonas originating form tongue, pharynx, lip, larynx and palate etc. However, reports of Neurilemmoma originating from cervical vagus nerve have been extremely rare. We experienced two cases neurilemmoma of cervical vagus nerve that were treated with different surgical methods. In the first case, the tumor was extirpated by sacrificing the nerve trunk and in second case, it was enucleated by preserving the neural pathway using the microsurgical technique.