1.Benign Epithelial Changes of Endometrium: Based on 450 hysterectomy specimens obtained from Jan. 1994 to Dec. 1994.
Hye Kyung LEE ; Myung Jin JOO ; Kwang Min LEE ; Dong Kyu CHUNG
Korean Journal of Pathology 1996;30(11):966-971
To evaluate the incidence and clinico-pathologic correlation of benign epithelial changes of endometrium, we tried to classify the changes into squamous cell change, ciliary change, eosinophilic cell change, papillary surface epithelial change, and mucinous cell change by the criteria of Hendrickson. Based on the 450 hysterectomy specimens obtained from Jan. 1994 to Dec. 1994 in PMC, the incidence of the cell changes was as follows: squamous cell change: 1.1%, eosinophilic cell change: 6.8%, mucinous cell change: 6.6%, ciliary change: 10.4%, papillary surface epithelial change: 16.4%. Squamous cell change was noted in severe endometritis or endometrial hyperplasia and papillary surface epithelial proliferation was mainly associated with plasma cell infiltration in adenomyosis or leiomyoma. Eosinophilic change and ciliary change were sometimes concomitantly found in dilated glands of the basal layer or in the invaded glands of adenomyosis. The results of this study suggested a correlation of benign epithelial changes with endometritis, adenomyosis, leiomyoma and dysfunctional uterine bleeding.
Incidence
2.Influence of implant-abutment interface design, implant diameter and prosthetic table width on strength of implant-abutment interface: three-dimensional finite element analysis.
Se Woong OH ; Jae Ho YANG ; Sun Hyung LEE ; Jung Suk HAN
The Journal of Korean Academy of Prosthodontics 2003;41(4):393-404
STATEMENT OF PROBLEM: Higher incidence of prosthetic complications such as screw loosening, screw fracture has been reported for posterior single tooth implant. So, there is ongoing research regarding stability of implant-abutment interface. One of those research is increasing the implant diameter and prosthetic table width to improve joint stability. In another part of this research, internal conical type implant-abutment interface was developed and reported joint strength is higher than traditional external hex interface. Purpose. The purpose of this study is to compare stress distribution in single molar implant between external hex butt joint implant and internal conical joint implant when increasing the implant diameter and prosthetic table width : 4mm diameter, 5mm diameter, 5mm diameter/6mm prosthetic table width. MATERIAL AND METHOD: Non-linear finite element models were created and the 3-dimensional finite element analysis was performed to see the distribution of stress when 300N static loading was applied to model at 0., 15., 30.off-axis angle. RESULTS: The following results were obtained: 1. Internal conical joint showed lower tensile stress value than that of external hex butt joint. 2. When off-axis loading was applied, internal conical joint showed more effective stress distribution than external hex butt joint. 3. External hex butt joint showed lower tensile stress value when the implant diameter was increased. 4. Internal conical joint showed lower tensile stress value than external hex butt joint when the implant diameter was increased. 5. Both of these joint mechanism showed lower tensile stress value when the prosthetic table width was increased. CONCLUSION: Internal conical joint showed more effective stress distribution than external hex joint. Increasing implant diameter showed more effective stress distribution than increasing prosthetic table width.
Incidence
3.Two Cases of Congenital Renal Hypoplasia.
Jun Ho CHANG ; Oh Tac WHANG ; Tae Eun CHOUNG ; Kwang Soo JUN ; Eung Jib KWAN
Korean Journal of Urology 1971;12(4):409-412
The incidence of congenital unilateral renal hypoplasia is extremely rare.Two cases of congenital unilateral renal hypoplasia were presented with review of literature.
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4.Histotopographic Observations on Metaplastic Changes of the Gallbladder Mucosa.
Eun Sil YU ; Yong Il KIM ; Sang Kook LEE
Korean Journal of Pathology 1985;19(1):58-66
Fifty three surgically resected gallbladders(49 cases of chronic cholecystitis with or without cholelithiasis, 4 cases of incidentally resected gallbladders) and 14 autopsy cases were subjected to the histotopographic analysis to identify the nature and distribution of metaplastic mucosal changes, and to determine the possible histogenesis of these mucosal lesions and diagnostic implication as a parameter of chronic cholecystitis. 1) Antral type glands were demonstrated in 47(88.7%), goblet cells in 19(35.8%) and surface epithelial changes in 27(50.9%) of total surgical specimens, indicating the benign metaplastic changes of the gallbladder mucosa toward the gastric or intestinal type. 2) Topographic distribution illustrated the extension of antral type gland to the middle and upper one third portions of the gallbladder mucosa in 37 cases, each. Goblet cells in the middle and upper one third of the mucosa were demonstrable in 13 cases(68%) an 8 cases(42%), respectively. 3) Average age by degree of extension was 50.0 years in Grade O-I, 50.1 years in Grade II and 56.4 years in Grade III. 4) Among 53 surgically resected gallbladders, gallstone was found in 31 cases, in which was a significant correlation between the distribution of metaplastic changes by degree of extent and cholelithiasis. 5) There was no statistical significance between incidence of metaplastic changes of the gallbladder and degree of inflammatory reaction by means of chronic and/or acute inflammatory cell infiltration and Rokitansky-Aschoff sinus formation. 6) Only two out of fourteen autopsy cases demonstrated focal and spotty presence of goblect cells. It is of authors assumption that the lining epithelium of the gallbladder undergos various types of metaplastic changes in the diseased conditions, in which cholelithiasis is included as one of preceding factor. And also, the diagnostic implication of epithelial metaplasia as an expression of chronic cholecystitis is discussed.
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5.Empty sella: incidence and significance in MR.
Young AHN ; Hyun Sook HONG ; Jae Sung PARK ; Dae Ho KIM ; Hae Kyung LEE ; Moo Chan CHUNG ; Deuk Lin CHOI ; Ki Jung KIM
Journal of the Korean Radiological Society 1991;27(6):773-777
No abstract available.
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6.Alcoholic Liver Cirrhosis with Multiple Pulmonary Consolidations.
Young Soo AHN ; Sang Moo LEE ; Jong Eun JOO
Tuberculosis and Respiratory Diseases 2002;53(1):79-84
Pulmonary nocardiosis is an infrequent but severe infection due to the microorganism, Nocardia spp, which may behave as both an opportunists and as a primary pathogens. Usually nocardiosis is found in patients under immunosuppressive regimens for organ transplans, chemotherapy for a malignancy and corticosteroids. The experience of pulmonary nocardiosis in the medical literature is limited to just case reports, with a few series including extrapulmonary nocardiosis. It is believed that the incidence of this infection has been increasing since 1960. The diagnosis is difficult because of the nonspecific clinical manifestations, the lack of laboratory evidence, and the non-specific radiographic findings. Here, we report a case of pulmonary nocardiasis in a 66 year-old patient with alcoholic liver cirrhosis who has suffered from acutely developed dyspnea and general edema. The nocardia species. was cultured from a specimen obtained by a percutaneous transthoracic needle biopsy.
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7.Low-grade Immature Teratoma of the Ovary with Gliomatosis Peritonei: A case report.
Korean Journal of Pathology 1994;28(3):322-324
Immature teratoma accounts for less than I percent of all ovarian teratomas and occurs commonly in young individuals, the peak incidence being in the second decade. It contains a variable mixture of mature and immature tissues in which neuroectodermal elements almost always predominate. Gliomatosis peritonei, miliary implants of mature glial tissues on the peritoneum or omentum, is an infrequently reported complication of mature or immature ovarian teratomas. We describe the first case in Korea of a 12-year-old girl with an immature teratoma and numerous glial peritoneal implants.
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8.Optic Nerve Glioma with Neurofibromatosis.
Na Hye MYONG ; Seung Sook LEE ; Yun Lim SHU ; Je G CHI
Korean Journal of Pathology 1993;27(5):524-530
Optic nerve gliomas manifest either as a solitary form or a component of von Recklinghausen's neurofibromatosis. The reported incidence of coexistence with neurofibromatosis varies from 12% to 70%. Usually there are no significant cytological differences between the gliomas that accomapny the disease and those that are deemed to be solitary manifestations. The only possible difference between them is the apparently more common association, with the former, of extensive arachnoid hyperplasia and of a more florid local gliomatous infiltration into the leptomeninges, altogether resulting in perineural thickening. Our cases were 8 and 6 years old girls, respectively, presented with slowly progressive proptosis for 4 years and visual disturbance for 2.5 months. There were multiple cafe au lait spots on their trunks, and case 2 showed Lisch nodules in the iris. MRI of brain revealed unilateral optic nerve thickening with involvement of chiasm or multiple intracranial lesions. Resection of optic nerve tumor was performed. Microscopically, variable degree of tumorous change was seen. Most typically enlarged area was composed of intraneural and perineural portions surrounded by a layer of intact dura. Intraneural tumor revealed proliferation of elongated, spindle-shaped pilocytic astrocytes in intertrabecular spaces and distention of the pial septa with fibrovascular thickening. Another segment had areas with reactive gliosis. Perineural tissue was considerably thickened and, associated with proliferation of meningothelial cells and fibroblasts intermingled with astrocytes and Rosenthal fibers. There were increase of the optic nerve diameter and distention of the overlying dura. Foci of arachnoid cell hyperplasia were noted in both cases, although differed in degree. Immunohistochemically, the tumor cells expressed glial fibrillary acidic protein in intraneural and perineural portions particularly in case 2.
Incidence
9.Spindle Cell Carcinoma in Larynx: A case showing bone formation.
Hye Kyung AHN ; Hye Rim PARK ; Young Euy PARK
Korean Journal of Pathology 1993;27(3):293-295
Spindle cell carcinoma of the upper aerodigestive tract mucosa was usually presented as polypoid mass and shows squamous cell carcinoma or dysplasia in the surface and underlying spindle cell proliferation. The spindle cell area discloses a variable pattern of sarcoma including rare osteosarcoma of 0~20% incidence. The histogenetic origin of the spindle cell component is now considered a metaplasia of squamous cell carcinoma. We experienced a case of spindle cell carcinoma of larynx showing massive underlying bone formation with proliferation of osteoclast-like cells in 75 year-old man. The immunohistochemical study demonstrates positive reaction with cytokeratin in area of squamous cells and with vimentin in area of spindle cells and osteoclasts. There are very focal reactivity for high molecular weight cytokeratin in spindle cell area.
Incidence
10.Combined Clear Corneal Phacoemulsification and Pars Plana Vitrectomy.
Byung Ro LEE ; Jeong Hee HWANG ; Yoon Jung LEE
Journal of the Korean Ophthalmological Society 2005;46(7):1138-1143
PURPOSE: To report the technical effectiveness, outcome, and incidence of complications of combined clear cornea phacoemulsification with intraocular lens implantation and pars plana vitrectomy. METHODS: Single-center prospective, non-comparative, consecutive case series. Twenty-three eyes of 23 patients underwent combined clear cornea phacoemulsification and pars plana vitrectomy for various vitreoretinal disorders due to cataracts by a single surgeon between July 2003 and August 2004. Surgical feasibility, intraoperative and postoperative complications and outcome of clear cornea incisions in all combined procedure were evaluated. RESULTS: No significant adverse effect of clear corneal wound on pars plana vitrectomy procedures was noted in any of the patients. Operatively and postoperatively, no significant complications related to clear corneal wound were noted, even with the variations of pars plana vitrectomy procedures for cases with and without gas-fluid exchange and intravitreal tamponade. CONCLUSIONS: Clear corneal incisions is a safe and more reasonable alternative in combined phacoemulsification with intraocular lens implantation and pars plana vitrectomy. For a more comprehensive conclusion, a comparative study with scleral tunnel incisions may be necessary.
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