Chin ; Humans ; Polyethylene ; Transplants

Cephalometry ; Dentofacial Deformities ; Esthetics ; Humans ; Lip ; Nose ; Orthognathic Surgery ; Osteotomy ; Strikes, Employee

An esophageal schwannoma originating in a schwann cell of a neuron presents as a type of submucosal tumor. An esophageal schwannoma is extremely rare, with only 30 reported cases. It is usually a benign tumor. However, three cases with malignant findings and one case with local recurrence have been reported. Reviews of previous reports indicate that benign schwannomas are usually located in the upper esophagus and occur in middle aged-women. An esophageal schwannoma is usually asymptomatic but sometimes causes dysphagia as an initial symptom and dyspnea by trachea compression. The differentiation of a schwannoma from the other submucosal tumors is very difficult on a preoperative examination with the use of esophagoscopy, endoscopic ultrasound and computed tomography. A definite diagnosis of the tumor requires a histological examination and immunohistochemical staining. Positive immunostaining for s-100 protein supports the schwann cell origin of the tumor. We report a case of an esophageal schwannoma with intense FDG uptake as detected on PET-CT.
Deglutition Disorders ; Dyspnea ; Esophagoscopy ; Esophagus ; Neurilemmoma ; Neurons ; Recurrence ; S100 Proteins ; Trachea

Over the last several years, eosinophilic esophagitis in adults is an increasingly recognized disease in various parts of world. A 77-year-old male with a gastric submucosal tumor was referred to our department for endoscopic ultrasonography. During the examination, there was some resistance in inserting the echoendoscope into the esophagus. Detailed endoscopic examination of the esophagus showed narrow lumen and scattered whitish plaques, and biopsy of the esophagus revealed more than 20 eosinophils per high-power field. We diagnosed this case as eosinophilic esophagitis and treated successfully by topical steroid. We report a case of eosinophilic esophagitis found incidentally during endoscopic ultrasonography for a gastric submucosal tumor.
Adult ; Aged ; Biopsy ; Endosonography ; Eosinophilic Esophagitis ; Eosinophils ; Esophagus ; Humans ; Male

Recently, various attempts have been made to apply diverse types of nanoparticles in biotechnology. Silica nanoparticles (SNPs) have been highlighted and studied for their selective accumulation in diseased parts, strong physical and chemical stability, and low cytotoxicity. SNPs, in particular, are very suitable for use in drug delivery and bioimaging, and have been sought as a treatment for ischemic diseases. In addition, mesoporous silica nanoparticles have been confirmed to efficiently deliver various types of drugs owing to their porous structure. Moreover, there have been innovative attempts to treat ischemic diseases using SNPs, which utilize the effects of Si ions on cells to improve cell viability, migration enhancement, and phenotype modulation. Recently, external stimulus-responsive treatments that control the movement of magnetic SNPs using external magnetic fields have been studied. This review addresses several original attempts to treat ischemic diseases using SNPs, including particle synthesis methods, and presents perspectives on future research directions.

PURPOSE: Asthenia universalis is a common symptoms complaint found in the emergency department (ED) especially among the elderly. However, emergency physicians often find it difficult to initiate evaluation given lack of research in this field. The aim of this study is to evaluate the clinical characteristics of asthenia universalis in elderly patients and compare them to adult patients presenting to the ED for similar complaints. METHODS: Patients who presented to the ED with asthenia universalis between March 2004 through February 2005 were obtained using data warehouse from electronic medical records. We excluded patients with underlying illness such as neurosis, organic diseases, depression, in addition to patients who refused to participate. Characteristics of the elderly group (> 64 years) were compared with the adult group (15~64 years) based on clinical and laboratory findings. Chi-square test a Fisher's test was used for nominal variables and a Mann-Whitney U test or Students t-test for continuous variables was used. RESULTS: During the study period asthenic patients comprised 0.81% (566/ 69,922) of total ED visits. Of those 566 patients, 82 patients were included in the study of which 25 were male and 56 female. Both genders were equally distributed between the two groups studied (elderly vs. adult). 58.3% of patients had an underlying medical illness (elderly group 81.1%, adult group 46.2%). The clinical impressions included infections or inflammation disorders (30.5%), endocrine disorders (17.1%), and psychiatric illnesses excluding depression (15.9%). Laboratory findings revealed a higher prevalence of hyponatremia (p=0.008), hypokalmia (p=0.033) and hypoalbuminemia (p=0.036) in the elderly group. CONCLUSION: In elderly patients presenting with asthenia universalis to the ED, a higher prevalence of underlying infections and endocrine disorders were present compared to adult patients presenting with asthenia universalis. In addition, the elderly more frequently had associated laboratory abnormalities to include hyponatremia, hypokalemia, hypoalbuminenia when compared to the adult patients.
Adult* ; Aged* ; Asthenia* ; Depression ; Electronic Health Records ; Emergencies* ; Emergency Service, Hospital ; Female ; Humans ; Hypoalbuminemia ; Hypokalemia ; Hyponatremia ; Inflammation ; Male ; Prevalence

BACKGROUND/AIMS: Laterally spreading tumors (LSTs) are similar in color to the adjacent mucosa, so they are difficult to recognize. This study aimed to investigate the features of LSTs by morphologic classification and find effective diagnoses and treatments. METHODS: This retrospective study was done between March 2006 and August 2008. We reviewed patients' medical records, endoscopic findings, and histological findings. RESULTS: A total of 151 patients met criteria for LSTs. Eighty-seven lesions (57.6%) were of the granular type. The most frequent location was ascending colon (37.1%), followed by rectum and sigmoid colon (36.4%). The cecum is a common site in the granular type, but the transverse colon is common in the nongranular type. The overall malignancy rate was 21.2%, and the malignant rate increased in proportion to size. Malignant rates were higher for the mixed nodular type (25.9%) and pseudo-depressed type (41.2%) than for the homogeneous granular type (3.0%) or flat elevated type (10.0%). CONCLUSIONS: LSTs showed different clinicopathologic characteristics according to their morphologic classification. The homogenous type has a lower malignant potential. Piecemeal resection for those with a large diameter is possible, while the pseudo-depressed and mixed nodular types have a higher malignant potential and should receive en-bloc resection as soon as possible.
Cecum ; Colon, Ascending ; Colon, Sigmoid ; Colon, Transverse ; Colorectal Neoplasms ; Humans ; Medical Records ; Mucous Membrane ; Rectum ; Retrospective Studies

BACKGROUND: Carcinoma of the ampulla of Vater is rare and its pathogenesis is unclear. The role of epigenetic changes in the APC or CDH1, in the Wnt pathway, has not been reported in ampullary carcinomas. METHODS: We performed immunohistochemistry on 73 sporadic ampullary carcinomas to identify Wnt-related molecules (APC, beta-catenin, E-cadherin, c-erbB2, cyclin D1) and examined mutations in the CTNNB1, loss of heterozygosity of 5q21, and the methylation status of the CpG island of APC and CDH1. RESULTS: Thirteen tumors (17.8%) showed abnormal nuclear localization of beta-catenin; this was more prominent in the intestinal type than in the pancreaticobiliary type (p=0.01). The loss of APC correlated with the loss of beta-catenin or c-erb B2 (p<0.01). The prognosis was worse in the group with APC loss than when APC was maintained (p<0.05). There was no mutation identified in CTNNB1. Six (24%) out of 25 informative cases had 5q21 allelic loss. CpG island methylation in APC and CDH1 was detected in 33 (45.2%) and 29 (31.5%) cases, respectively. CONCLUSIONS: The absence of mutations in CTNNB1 and the epigenetic alteration of APC and CDH1, might be characteristic changes in the Wnt/beta-catenin signaling pathway during the carcinogenesis of ampullary carcinomas.
Ampulla of Vater* ; beta Catenin ; Cadherins ; Carcinogenesis ; CpG Islands ; Cyclins ; Epigenomics* ; Immunohistochemistry ; Loss of Heterozygosity ; Methylation ; Prognosis ; Wnt Signaling Pathway

The invasive cervical cancer associated with pregnancy is rare case, but the most common cancer among the malignancy associated with pregnancy. The diagnosis and the symptoms are not different from the non-pregnancy case, but vaginal bleeding which is the main symptom of cervical cancer is often misconceived for usual complication of pregnancy, and could delay the diagnosis. Pregnancy provides ideal times for cervical cancer screening, since pelvic examination could be easily performed. So all pregnant patients should have a cytology at the initial antenatal visit. The treatment is not significantly different from the non-pregnancy, but when we determine the treatment plan, the start time of treatment is most important point and it was affected by the gestational age at diagnosis and strong desire of the patients. We report 3 cases of invasive cervical cancer associated with pregnancy since 1998, and we delayed the treatment until postpartum in 2 cases.
Diagnosis ; Gestational Age ; Gynecological Examination ; Humans ; Mass Screening ; Postpartum Period ; Pregnancy* ; Uterine Cervical Neoplasms* ; Uterine Hemorrhage

BACKGROUND: Various methods based on gold nanoparticles (AuNPs) have been applied to enhance the photothermal effect. Among these methods, combining gold nanoparticles and stem cells has been suggested as a new technique for elevating the efficiency of photothermal therapy (PT) in terms of enhancing tumor targeting effect. However, to elicit the efficiency of PT using gold nanoparticles and stem cells, delivering large amounts of AuNPs into stem cells without loss should be considered. METHODS: AuNPs, AuNPs-decorated silica nanoparticles, and silica-capped and AuNPs-decorated silica nanoparticles (SGSs) were synthesized and used to treat human mesenchymal stem cells (hMSCs). After evaluating physical properties of each nanoparticle, the concentration of each nanoparticle was estimated based on its cytotoxicity to hMSCs. The amount of AuNPs loss from each nanoparticle by exogenous physical stress was evaluated after exposing particles to a gentle shaking. After these experiments, in vitro and in vivo photothermal effects were then evaluated. RESULTS: SGS showed no cytotoxicity when it was used to treat hMSCs at concentration up to 20 lg/mL. After intravenous injection to tumor-bearing mice, SGS-laden hMSCs group showed significantly higher heat generation than other groups following laser irradiation. Furthermore, in vivo photothermal effect in the hMSC-SGS group was significantly enhanced than those in other groups in terms of tumor volume decrement and histological outcome. CONCLUSION Our results suggest that additional silica layer in SGSs could protect AuNPs from physical stress induced AuNPs loss. The strategy applied in SGS may offer a prospective method to improve PT.