Pindborg Tumor on Hard Palate / 대한이비인후과학회지

Pindborg tumor occurs rarely, with a frequency ranging from 0.17% to 1.8% of all odontogenic tumor. It typically presents as a painless asymptomatic expansile mass, but it can result in mechanical effects. The treatment of Pindborg tumor in the past has varied, ranging from enucleation or curettage, to hemimandiblectomy or hemimaxillectomy. We experienced a case of Pindborg tumor treated by marsupialization with sufficient results. But since recurrence has been reported from 10% to 14%, we plan on close observation over at least 5 years.

The Usefulness of Rectified VEMP

OBJECTIVES: For a reliable interpretation of left-right difference in Vestibular evoked myogenic potential (VEMP), the amount of sternocleidomastoid muscle (SCM) contraction has to be considered. Therefore, we can ensure that a difference in amplitude between the right and left VEMPs on a patient is due to vestibular abnormality, not due to individual differences of tonic muscle activity, fatigue or improper position. We used rectification to normalize electromyograph (EMG) based on pre-stimulus EMG activity. This study was designed to evaluate and compare the effect of rectification in two conventional ways of SCM contraction. METHODS: Twenty-two normal subjects were included. Two methods were employed for SCM contraction in a subject. First, subjects were made to lie flat on their back, lifting the head off the table and turning to the opposite side. Secondly, subjects push with their jaw against the hand-held inflated cuff to generate cuff pressure of 40 mmHg. From the VEMP graphs, amplitude parameters and inter-aural difference ratio (IADR) were analyzed before and after EMG rectification. RESULTS: Before the rectification, the average IADR of the first method was not statistically different from that of the second method. The average IADRs from each method decreased in a rectified response, showing significant reduction in asymmetry ratio. The lowest average IADR could be obtained with the combination of both the first method and rectification. CONCLUSION: Rectified data show more reliable IADR and may help diagnose some vestibular disorders according to amplitude-associated parameters. The usage of rectification can be maximized with the proper SCM contraction method.

Two Cases of Large Auricular Keloids / 대한이비인후과학회지

Keloids are fibrous overgrowth resulting from abnormal wound healing processes at the site of cutaneous injury. It extends beyond the confines of the original wound, begins later after injury, and does not regress with time contrary to hypertrophic scar. The gold standard has not been established in the treatment of keloids, yet. Excision of keloid alone showed a high rate of recurrence (45-100%). Recently, we have experienced two keloidal masses in the auricle (one on helix, the other on lobule), which were treated with surgery and adjuvant steroid injection. We developed an anteriorly-based skin flap from the skin covering of the keloidal mass and used it for several reasons. We also used triamcinolone injection after the surgery. In this paper, we are presenting the result of these cases with a review of literature.

Two Cases of Mumps Involving Only Submandibular Glands / 대한이비인후과학회지

Mumps virus infections usually involve the parotid glands. It usually spreads from a human reservoir by airborne droplet of infected saliva. Therefore, early proper diagnosis and isolation of patients can help to inhibit dissemination of the disease. Diagnosis of mumps virus infection is mainly dependent on clinical inspection, palpation of the parotid and laboratory tests, because most mumps virus infections involve the parotid gland. Isolated submandibular gland involvement in mumps is rare and presents diagnostic challenge. We report unusual consecutive cases of mumps virus infections in two patients who were brothers, for whom bilateral submandibular glands were found to be involved paring parotid glands. These cases instruct us not to exclude mumps virus infection even in isolated uni/bilateral submandibular gland swelling.