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Primary squamous cell carcinoma of thyroid is a very rare malignant tumor with poor prognosis. It is usually diagnosed as an advanced disease infiltrating adjacent organs, and characterized by aggressive clinical course with an average postoperative survival time of less than 1 year. Recently, we had a 79- year-old woman with a painful neck mass who was diagnosed as primary squamous cell carcinoma of thyroid gland. She underwent total thyroidectomy and selective neck dissection(level Ⅲ, Ⅵ) with no further postoperative managements such as radiation therapy or chemotherapy; she died of poor general condition and pneumonia resulting from rapid progression of the lesion on the 38th day after surgery. We report this case with a review of relevant literatures.
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BACKGROUND AND OBJECTIVES: The present study aims to investigate whether the cochlear implant electrode array design affects the electrophysiological and psychophysical measures. SUBJECTS AND METHODS: Eighty five ears were used as data in this retrospective study. They were divided into two groups by the electrode array design: lateral wall type (LW) and perimodiolar type (PM). The electrode site was divided into three regions (basal, medial, apical). The evoked compound action potential (ECAP) threshold, T level, C level, dynamic range (DR), and aided air conduction threshold were measured. RESULTS: The ECAP threshold was lower for the PM than for the LW, and decreased as the electrode site was closer to the apical region. The T level was lower for the PM than for the LW, and was lower on the apical region than on the other regions. The C level on the basal region was lower for the PM than for the LW whereas the C level was lower on the apical region than on the other regions. The DRs on the apical region was greater for the PM than for the LW whereas the DR was narrower on the apical region than on the other regions. The aided air conduction threshold was not different for the electrode design and frequency. CONCLUSIONS: The current study would support the advantages of the PM over the LW in that the PM had the lower current level and greater DR, which could result in more localized neural stimulation and reduced power consumption.
Assuntos
Potenciais de Ação , Implantes Cocleares , Orelha , Eletrodos , Estudos RetrospectivosRESUMO
BACKGROUND AND OBJECTIVES@#Expanded polytetrafluoroethylene (ePTFE) is an alloplastic implant widely used in augmentation rhinoplasty. However, ePTFE implant is known to be vulnerable to postoperative infection and inflammation. We aimed to verify the safety of the material by analyzing the results of augmentation rhinoplasty using ePTFE carried out in a single institution for 10 years.SUBJECTS AND METHOD: From April 2009 to June 2018, 238 patients who underwent augmentation rhinoplasty with ePTFE were included in the study. There were 187 male patients and 51 female patients. Patients' medical records, preoperative and postoperative photographs were analyzed, and postoperative implant migration, inflammation, and infection were investigated.@*RESULTS@#Of the 238 patients, 10 underwent revision surgery, and 87 (36.6%) underwent concomitant osteotomy for the correction of the deviated nose. Of the 5 patients (2.1%) who showed postoperative implant migration, 4 patients belonged to the osteotomy patients group while 1 patient belonged to the no-osteotomy group. There was more frequent implant migration in patients who underwent osteotomy; however, there was no statistically significant difference (p=0.06). In all of the five patients, the degree of implant migration was minimal, therefore no patient required revision surgery. No inflammatory reaction or infection was found after surgery.@*CONCLUSION@#ePTFE is a safe material for augmentation rhinoplasty and is not susceptible to infection after surgery if used through appropriate surgical procedures