PURPOSE: Although most researchers agree that platelet-rich plasma (PRP) is a good source of autogenous growth factors, its effect on bone regeneration is still controversial. The purpose of this study was to evaluate whether increasing angiogenic factors in the human PRP to enhance new bone formation through rapid angiogenesis. MATERIAL AND METHODS: In vitro, the human platelets were activated with application of shear stress, 20 microgram/ml collagen, 2 mM CaCl2 and 10U thrombin/1 x 109 platelets. Level of vascular endothelial growth factor (VEGF) and platelet microparticle (PMP) in the activated platelets were checked. In the animal study, human angiogenic factors-enriched PRP was tested in 28 athymic rat's cranial critical bone defects with beta-TCP. Angiogenesis and osteogenesis were evaluated by laser Doppler perfusion imaging, histology, dual energy X-ray densinometry, and micro-computed tomography. RESULTS: In vitro, this human angiogenic factors-enriched PRP resulted in better cellular proliferation and osteogenic differentiation. In vivo, increasing angiogenic potential of the PRP showed significantly higher blood perfusion around the defect and enhanced new bone formation around acellular bone graft material. CONCLUSION: Angiogenic factor-enriched PRP leads to faster and more extensive new bone formation in the critical size bone defect. The results implicate that rapid angiogenesis in the initial healing period by PRP could be supposed as a way to overcome short term effect of the rapid angiogenesis.
Angiogenesis Inducing Agents ; Animals ; Blood Platelets ; Bone Regeneration ; Calcium Phosphates ; Cell Proliferation ; Collagen ; Durapatite ; Humans ; Intercellular Signaling Peptides and Proteins ; Osteogenesis ; Perfusion ; Perfusion Imaging ; Platelet-Rich Plasma ; Rats, Nude ; Transplants ; Vascular Endothelial Growth Factor A

Subfalcial herniation secondary to a unilateral supratentorial space occupying lesion is frequently seen on the brain CT scan, however, the development of distal anterior cerebral artery infarction following compression of the terminal branches of the pericallosal artery against the falx during the period of subfalcial herniation is uncommon. For the last three years, we have experienced three cases of distal anterior cerebral artery infarction caused by subfalcial herniation on the brain CT scan. All patitnts had acute subdural hematomas resulting in subfalcial herniation on the first CT scan and subsequently developed focal infarctions in the ipsilateral paracentral lobule. The patients did not improve clinically and died several days after operation. The development of such infarction may reflect severe cerebral injury and portend a poor clinical outcome.
Anterior Cerebral Artery* ; Arteries ; Brain ; Hematoma, Subdural, Acute ; Humans ; Infarction* ; Infarction, Anterior Cerebral Artery ; Tomography, X-Ray Computed

No abstract available.
Drug Therapy* ; Humans ; Uterine Cervical Neoplasms*

OBJECTIVES: The diagnosis of ASCUS(atypical squamous cells of undetermined significance) and LSIL(low-grade squamous intraepithelial lesion) was introduced in 1988 by the Bethesda system for reporting cervical/vaginal cytologies. A significant proportion of women referred for colposcopy with low grade cervical cytologic abnormalities(ASCUS and LSIL) will have high grade cervical intraepithelial neoplasia(CIN II or CIN III) and therefore require adequate management. The purposes of this study were to evaluate the usefulness of high risk type HPV(human papillomavirus) DNA detection using PCR(polyerase chain reaction) in patients with low grade cervical cytologic abnormalities in the prediction of high grade CIN and invasive cancer and to determine the clinical triage in the management of low grade cervical cytologic abnormalities. METHODS: We reviewed 18,942 cases of Papanicolau smears that were performed at our hospital from Jan. 1995 to Mar. 1999. Colposcopically directed biopsy or LLETZ(large loop excision of transformation zone) or hysterectomy were performed on 318 patients with abnormal PAP smears of low degree. HPV PCR testing of high risk types(16 and 18) was also performed on 115 patients. RESULTS: Histologic outcome of ASCUS included 43 cases(38.4%) of high grade CIN and invasive cancer, and that of LSIL included 65 cases(47.5%) of high grade CIN and invasive cancer. In cases of high risk HPV type, 19 patients(73.1%) were at age over 30 years. A highly significant correlation was found between a positive test for high risk types of HPV and finding of high grade CIN and invasive cancer. Among 51 women with ASCUS, a positive test for high risk type had a sensitivity and specificity of 40.0% and 86.1%, and positive predictive value(PPV) and negative predictive value(NPV) of 54.5% and 77.5%, respectively. In 64 women with LSIL, a positive high risk type test was associated with sensitivity and specificity of 30.0% and 94.1%, and PPV and NPV of 81.8% and 60.4%, respectively. CONCLUSION: Our results suggest that high risk type HPV may be positively predictive of and may act as a surrogate marker for high grade CIN and invasive cancer in women with low grade cervical cytologic abnormalities. The management of women with a low grade cervical cytologic abnormalities should be active such as colposcopically directed biopsies.
Biomarkers ; Biopsy ; Colposcopy ; Diagnosis ; DNA* ; Female ; Humans* ; Hysterectomy ; Polymerase Chain Reaction ; Sensitivity and Specificity ; Triage

No abstract available.
Appendicitis* ; Child* ; Humans

OBJECTIVE: The aim of this study was to identify human papilloma virus(HPV) infection in cervical lesions by using polymerase chain reaction in situ hybridization(PCR-ISH) and to compare the results of PCR-ISH with conventional in situ hybridization(ISH) METHODS: Forty-seven randomly chosen neutral-buffered formalhyde-fixed cervical biopsies in which cervical intraepithelial neoplasia and invasive cervical cancer had been diagnosed were tested for HPV DNA by PCR-ISH and ISH. The method of PCR-ISH includes deparaffinization of specimens, PCR amplification of DNA, in situ hybridization and detection of amplified products. RESULTS: The positivity rate of ISH was 36% for all biopsies and 26%, 40% for CIN and invasive cancer respectively. By using PCR-ISH the positivity was 80%, 84% respectively. All PCR-ISH positive cases were ISH positive and no ISH positive was PCR-ISH negative. CONCLUSION: In our study HPV DNA, undetectable by standard in situ hybridization, was detectable by PCR in situ hybridization. Our study shows that PCR in situ hybridization is highly sensitive method for detection of HPV in cervical neoplastic specimens with morphological evidence.
Adenomyosis ; Biopsy ; Cervical Intraepithelial Neoplasia ; DNA ; Endometriosis ; Female ; Humans ; In Situ Hybridization* ; Papilloma ; Polymerase Chain Reaction* ; Uterine Cervical Neoplasms

No abstract available.
Carcinoma, Squamous Cell* ; Cisplatin* ; Drug Therapy, Combination* ; Female ; Ovary* ; Paclitaxel*

OBJECTIVE: This study was performed to evaluate the effects of mutiple indications and age on the likelihood of finding cervical lesion in large loop excision of transformation zone(LLETZ). METHOD: We reviewed the medical records of 471 evaluable LLETZ of cervix for cervical neoplasia at the Yonsei University College of Medicine, from April 1996 to August l998. The indications for the LLETZ were grouped as being for treatment(biopsy-proven disease)(indication A), significant discrepancy among cytologic and histologic results(indication B), unsatisfactory colposcopic finding(transformation zone not fully visualized)(indication C), possible microinva- sion(indication D), and combinations of the above. RESULTS: The prevalence rates of cervical lesion in performed LLETZ for indication A alone, for indication B alone, for a combination of indication A and C, for a combination B and C, and for indication D alone were 85.7%, 56.5%, 82.3%, 42.6%, 95%, respectively. The data were then reanalyzed to determine the likelihood of finding high-grade disease on LLETZ specimen. Overall, those with preoperative high-grade cytologic or histologic characteristics were much more likely to have high grade disease(78.1%) than were those with preoperative low-grade cytologic or histologic characteristics(27.2%)(p<0.001). The influence of age on the likelihood of identifying diasease on the LLETZ is undertermined. CONCLUSION: Neither age nor the preoperative grade of disease are good discriminators of the likelihood that disease will be found on a LLETZ specimen, However, patients with preoperative high-grade disease are much more likely than those with preoperative low-grade disease to have high-grade dysplasia or invasive cancer on LLETZ.
Cervix Uteri ; Female ; Humans ; Medical Records ; Prevalence

To evaluate the clinical efficacy of emergency cervical cerclage in the treatment of advanced cervical incompetence, a prospective clinical trial was performed in 18 patients with advanced cervical incompetence at 20 to 25 weeks gestation. Modified McDonalds operation with or without transabdominal amniocentesis was used for cervical cerclage. Pregnancy was prolonged for a sufficient time to deliver viable fetuses in 56.3% of patients. The median procedure-to-delivery interval was 8.6 (range 0.1 to 20.5) weeks for the entire group, and 13.9 (range 6.5 to 20.5) weeks for 9 patients who achieved live birth. The median gestational age at delivery was 38.6 (range 28.3 to 41.0) weeks for the live infants. The median birthweight of the live infants was 3062 g (range 1050 to 3620 g). The lack of significant matemal morbidity combined with the results for the fetus-infant supports further efforts in this area.
Amniocentesis ; Cerclage, Cervical ; Emergencies* ; Fetus ; Gestational Age ; Humans ; Infant ; Live Birth ; Pregnancy ; Prospective Studies

Based on the theory that benign prostatic hypertrophy may be induced by androgenic effect of testosterone derivatives, especially 5-alpha - dihydrotestosterone, on prostatic tissue, Chlormadinone acetate(CMA), potent oral synthetic antiandrogen was investigated in the treatment of benign prostatic hypertrophy. Twenty-two patients of prostatic hypertrophy were studied over six months period with a special reference to uroflowmetry and following results were obtained : 1) Chlormadinone acetate induced improvement of obstructive urinary symptoms in terms of uroflowmetric measurement. 2) It is very worthwhile to initiate medical treatment before undergoing any surgical intervention or when surgery is contraindicated.
Chlormadinone Acetate* ; Dihydrotestosterone ; Humans ; Prostatic Hyperplasia* ; Testosterone