A Study on Pregnancy and Social Welfare of Unmarried Mother / 대한산부인과학회지

OBJECTIVE: To find out general characteristics, common problems, outcomes of delivery of unmarried mothers and related social factors, and to provide basic information based on the results in order to change social systems and to have a correct understanding of unmarried mothers. METHODS: We studied 196 unmarried mothers who delivered from Jan. 2003 to Aug. 2004. All data were collected by survey whose groups were divided into three by ages, and they were analyzed by Fisher's exact test obstetrically and socially. It verified 95% significant level. RESULTS: Cesarean section rate was 14.3% which is remarkably lower than married mothers. However, it is getting higher (p=0.003) as they are older, and the rate of group of 30s is similar to that of married mothers. Also, the average birth weight of unmarried mothers' babies is 3,056 gm and it is similar to that of married mothers. They took prenatal care only 3.27 times and 22% of them did not commence it until the 3rd trimester. Fifty seven percent drank alcohols, 51% smoked, and 49% used drugs during pregnancy. Most unmarried mothers who took this survey had a lower level and economic status. After delivery, 16.3% of them raise their babies and 83.7% of them had their babies adopted through welfare facilities. CONCLUSION: We conclude that it is necessary to have a social system, welfare facilities, and financial supports that educate contraceptive measures to potential unmarried mothers, let them recognize their situations, and protect them.

Identification of Target Genes in the Endometrial Carcinomas with Microsatellite Mutator Phenotype / 대한산부인과학회지

OBJECTIVE: Recent molecular genetic studies have revealed that two major types of genomic instabilities, chromosomal instability and microsatellite instability (MSI), exist in the endometrial carcinomas. Tumors with microsatellite mutator phenotype (MMP) are caused by defects in DNA mismatch repair genes. MMP tumors are believed to progress by accumulating frameshift mutations in coding microsatellite sequences of various cancer related genes including tumor suppressor genes, apoptosis related genes and DNA repair genes. Thus, the identification of the specific target genes in the MMP endometrial carcinomas is important for the elucidation of molecular pathogenesis of endometrial carcinomas. METHODS: We classified the MMP endometrial carcinomas and evaluated the frameshift mutations of the 11 genes containing coding microsatellite sequences by using 34 endometrial carcinomas and 4 MMP endometrial carcinoma cell lines. RESULTS: MSI was found in 6 of 34 endometrial carcinomas. In the endometrial carcinoma tissues, frequent mutations were found in TAF1B (68%), HT001 (50%), SLC23A1 (50%) and ACVR II (50%) in the MMP endometrial carcinoma tissues. The other 7 genes were infrequently mutated. Mutations of these target genes were more frequent in MMP endometrial carcinoma cell lines. CONCLUSION: we identified specific target genes in MMP endometrial carcinomas. These data demonstrate the mechanism of tumor progression in the MMP endometrial carcinomas.

Analysis of X Chromosome Inactivation in Women with Premature Ovarian Failure / 대한산부인과학회잡지

OBJECTIVE: Premature ovarian failure (POF) is a highly heterogenous condition, and its etiology remains unknown in approximately two-thirds of cases. POF can be caused by Turner syndrome, genetic disease, iatrogenic agents such as chemotherapy and radiotherapy, infection and autoimmune disease. X chromosome inactivation is the random process in females during early embryogenesis to achieve dosage compensation with males. But skewed X chromosome inactivation occurs in the female carriers, secondary to cell-autonomous selection against cells in which the abnormal X chromosome is active. Highly skewed X chromosome inactivation is likely to occur in POF which caused by subcytogenetic X chromosome deletion or translocation and X-linked gene mutation. The present study was performed to investigate whether highly skewed inactivation of X chromosome is observed in POF. METHODS: Eighty-six women with premature ovarian failure were studied and eighty-three normal women were enrolled as a control group. X chromosome inactivation pattern were determined by studying methylation pattern of androgen receptor gene. RESULTS: Seventy-six of the 86 POF patients were informative for X chromosome inactivation assay, 8 (10.5%) of them showed highly skewed X chromosome inactivation. In the age matched control group, 3 (4.1%) out of the 74 subjects showed highly skewed X chromosome inactivation. However, this finding is not statistically significant (p=0.2274). Among highly skewed X inactivation, one case of premature ovarian failure revealed 46,XX,del(X)(p21) by high resolution band karyotyping. Therefore highly skewed X inactivation can provide clues to evaluate the causes in POF. CONCLUSION: This study suggests that screening of skewed X chromosome inactivation for the POF will be useful to detect subcytogenetic X chromosome deletion or translocation and X-linked gene mutation associated with POF.

Minilaparotomy for Adnexal Surgery / 대한산부인과학회잡지

OBJECTIVE: This study investigates the morbidity of adnexal surgery through minilapatotomy by comparing with adnexal surgery through laparotomy. METHODS: From January 2000 to December 2001, 84 patients with adnexal diseases were managed through minilaparotomy and 80 patients treated with adnexal surgery through laparotomy. RESULTS: Fifty-three (69.0%) of the adnexal diseases were ectopic pregnancies. Fifty-seven patients (67.9%) were treated with salpingectomy. Other patients were treated with the following operations: salpingotomy (3 cases, 3.6%); salpingostomy (3 cases, 3.6%); fimbrioplasty (2 case, 2.4%); ovarian cyst enucleation (4 cases, 4.8%); ovarian resection (6 cases, 7.1%); parovarian cystectomy (5 cases, 6.0%); salpingooophorectomy (4 case, 4.8%). The average operation time for minilaparotomy was 30.5 +/- 9.2 minutes. The average bowel function recovery time for minilaparotomy was 28.2 +/- 15.6 hours (p<0.05). The average postoperative pain control was 29 cases (34.5%) lower than that of controls (p<0.05). The average postoperative hospital stay for minilaparotomy was 3.4 +/- 1.0 days (p<0.05). The procedure morbidity was lower than that of controls. CONCLUSION: It is suggested that minilaparotomy is a quick, convenient method to decrease patient morbidity and postoperative stay and that it could be considered an alternative to laparotomy for the treatment of adnexal diseases.

Mutational Analysis of Growth Differentiation Factor-9 Gene in Korean Women with Premature Ovarian Failure / 대한산부인과학회잡지

The clinical models for studying ovary-determining genes may be premature ovarian failure (POF). POF is a condition causing amenorrhea, hypoestrogenism, and elevated gonadotropins in women under 40 years old. FSH receptor, LH receptor, inhibin, GDF-9 (growth differentiation factor-9), BMP-15 (bone morphogenetic protein-15), DIAPH2 (diaphanous gene) and XPNPEP2 (X-prolyl aminopeptidase) genes were proposed as a possible candidate gene, but until recently, only mutations in FSH receptor, LH receptor and inhibin genes have been identified in POF patients. Therefore mutation screening of another POF gene necessary to reveal the principal causative genes of POF. OBJECTIVE: The present study was performed to analyze the mutation of GDF-9 gene in Korean patient with POF and to investigate whether mutation of these gene is a likely main cause of POF. METHODS: Eighty-six women with POF were studied and thirty-six normal women were enrolled as control. Mutation screening of these genes were performed by denaturing HPLC and were confirmed by automatic sequencing. RESULTS: Three different mutations of GDF-9 gene were identified in Korean women with POF; Arg3Cys mutation in one patient, Leu40Val mutation in one patient, Asp57Tyr mutation in 10 patients and 5 normal controls. Arg3Cys mutation and Leu40Val mutation were likely cause of disease. Frequencies of Arg3Cys mutation and Leu40Val mutation were 1.2%, respectively. Asp57Tyr mutation was common polymorphism in Korean women. All mutations was a novel mutation found in the present study. CONCLUSION: POF was resulted by mutations of GDF-9 gene, but mutations of GDF-9 gene are not likely main causes of POF because of low frequency of mutations.

Three Kinds of Problem-Based Learning Formulas Experienced in Konkuk University College of Medicine / 한국의학교육

We performed three kinds of problem-based learning (PBL) formulas in all of forty-one 3rd grade students after the final examination of the first semester from June 28, 1999 to July 9, 1999 at Konkuk University College of Medicine to investigate which formula is the most efficient and helpful in medical education and polyclinic course. The PBL formulas applied were the typical face-to-face PBL accompanied by mini-lecture (Type I) or by distribution of the guidelines without lecture (Type II) and cyber PBL using web-based module and discussion over cyber space (Type III). Response of students was surveyed using some questionnaires and the evaluation results of each PBL were analyzed with Pearson's correlation test. All participating students were satisfied with the face-to-face PBL especially in applying time of PBL, using discussion to solve the problem, and studying with tutors. In cyber PBL, in spite of excellency of the contents, limitations in discussion over cyber space and computer skills, misunderstanding of computer system, and additional cost for private PC rent seemed to decrease the satisfaction with this PBL. Experience in Type II PBL was turned out to be the most helpful and discussion among fellow students in PBL to be the most useful experience for incoming polyclinic course. There were no significant correlations between the evaluation results of face-to-face PBL and cyber PBL or between the evaluation results of each type of PBL and the average credit of that semester, suggesting that evaluation of the newly acquired knowledge through PBL using tools such as Triple Jump, OSCE (objective structured clinical examination), and MEQ (modified essay question) should be included in assesment of academic achievement in addition to the evaluation of activities during PBL.

Modified ACL Reconstruction Technique: Femoral Tunnel Preparation through the Anteromedial Portal / 대한정형외과학회잡지

Recent development and advances in arthroscopic surgical techniques for Anterior Cruciate Ligament(ACL) reconstruction have led to the single-incision techniques. Several potential pitfalls in the classic single-incision techniques were found and it has become necessary to develop a new, simpler method to overcome these problems. Seventy-five cases of arthroscope-assisted ACL reconstruction were prospectively studied. The radiologic results were compared between the group in which femoral tunnel preparation was performed by the tibia tunnel(classic technique, 35 cases) and the group in which the anteromedial portal was employed(modified technique, 40 cases). Significantly better results were obtained at the angle formed by the bone graft and the interference screw, the angle between the femoral tunnel axis and the anatomic axis of the femur, and the angle between the femoral tunnel axis and tibial tunnel axis in the modified technique(P<0.05). This study presents a modified arthroscope-assisted ACL reconstruction technique that uses the anteromedial portal for femoral tunnel preparation and insertion of interference screw. In the modified ACL reconstruction technique, the femoral tunnel preparation and femoral graft fixation were accomplished in the same direction and the femoral tunnel preparation was performed regardless of the tibial tunnel preparation, this allows the surgeon to handle the arthroscope freely and advance more posteriorly to get a better view of the posterior cortex.