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Biomedical subjects

I Szigetvári

Publications and source records attributed to I Szigetvári.

At least 19 recordsLinked to original sources
PubMed2001

High anti-paternal cytotoxic T-lymphocyte precursor frequencies in women with unexplained recurrent spontaneous abortions.

A number of cases of unexplained (idiopathic) recurrent spontaneous abortions may be attributable to immunological mechanisms. Several lines of evidence indicate that some immunocompetent effector cell populations play an important role in the pathogenesis of unexplained miscarriages. However a suitable method is lacking for defining an existing immunological background of recurrent spontaneous abortions. We tried to find a useful cellular immunological method, that is suitable for predicting the eventual immunological cause in the case of unexplained recurrent spontaneous abortions. We have examined the anti-paternal cytotoxic T-lymphocyte precursor frequencies by cell-mediated lympholysis and limiting dilution analysis in the peripheral blood of women with recurrent spontaneous abortions in order to reveal the functional role of this cell population in spontaneous abortions. An extremely high partner allo-antigen-specific cytotoxic T-lymphocyte precursor frequency was determined in the case of all those habitual aborters, where no other than an immunological cause could be responsible for the abortions. This phenomenon supports the important role of the T-lymphocytes in this disorder. We suggest that the immunological background of recurrent spontaneous miscarriages might be determined on the basis of a very high cytotoxic T-lymphocyte precursor frequency. This diagnostic test might be useful in selecting patients for immunotherapy.

Abortion, Habitual↗
PubMed2000

Placental site trophoblastic tumor. Clinical and pathological report of two cases.

Placental site trophoblastic tumor (PSTT) is the rarest disease of the gestational trophoblast. Our two cases will be interesting not only because of the rarity of the disease, but because both were recognized before operation. Since the tumor cells are lined up tightly side by side, this disease must be distinguished primarily from tumors of epithelial origin. The authors highlight that the diagnosis should rely on intense hPL-positivity as well as the ultrastructural image of the tumor. In histologically equivocal cases, the determination of hPL, hCG, and MIB-1 immunologic markers can be recommended as routinely performed morphological examinations. Serum hCG monitoring is recommended to follow the evolution of the tumor.

Adult↗
PubMed1998

Ovarian cysts in children and adolescents: their occurrence, behavior, and management.

STUDY OBJECTIVE: To evaluate the characteristics and symptoms of ovarian cysts, their connection with the methods of treatment, and the effectiveness of the therapy. METHODS: A retrospective analysis of data on girls with ovarian cysts was performed at a university clinic. Participants included 119 girls in whom 144 ovarian cysts were found by ultrasound examination performed either routinely or for a specific purpose. One group of patients received gestogen to facilitate resolution of the cyst and as treatment of menstrual disorder. Others received clomiphene citrate exclusively as therapy for menstrual irregularity. Aside from this, patients were treated by surgical intervention, or only follow-up sonography was performed. The site, number, size, and type of the cysts were examined. The indications for ultrasonography and the effectiveness of the treatment were analyzed. RESULTS: The ovarian cysts were mostly unilateral, unilocular, and simple, with the size varying between 3 cm and 5 cm in diameter in 90 cases, more than 5 cm in 41 cases, and less than 3 cm in 13 cases. A number of cysts were found incidentally on ultrasound. Girls were scanned most often because of irregular bleeding (80 cases). Hormonal treatment was given in 105 cases, whereas in 35 cases only follow-up sonography was performed. Cysts resolved spontaneously in 4.5 weeks on average, or in 3 weeks after hormonal treatment. Surgical therapy was necessary for nine patients. The indication for surgery was the detection of complex cysts indicative of dermoid type, size of the cysts, severe pelvic pain, or failure of the cyst to resolve or decrease in size spontaneously or in response to treatment as determined by follow-up sonography. All of the cysts were benign on pathological evaluation. CONCLUSION: Most ovarian cysts in girls could be managed conservatively, even the larger ones greater than 5 cm in diameter. Only exceptional cases required surgical therapy. Hormonal treatment shortened the duration of the cysts somewhat, but not significantly, and thus was useful mainly in the treatment of concomitant menstrual disorders.

Adolescent↗
PubMed1998

Sonographic diagnosis of a retroperitoneal dermoid cyst in a young girl.

We describe the detection and management of a retroperitoneal dermoid cyst in a young girl. Transabdominal ultrasound revealed in the pelvis a complex mass with anechogenic and echogenic components characteristic of a dermoid cyst. Initially, it was presumed to be of ovarian origin, because extragonadal dermoid cysts are very rare in adolescence; however, the findings on physical examination were normal. Laparoscopy was performed but failed to identify a cyst. Ultrasound examination was repeated intraoperatively and confirmed the presence of the cyst, which was then removed by laparotomy from the retroperitoneum. This case illustrates the significance of ultrasonography in the diagnosis of a rare condition in adolescent gynecology and demonstrates the possibility of performing ultrasound scanning intraoperatively to confirm the presence of a mass which was not identified by laparoscopy.

Adolescent↗
PubMed1995

The polymorphic human TLX-B/CD46/MCP system and its implications in transplantation and reproduction.

TLX antigens have been found on most peripheral blood cells, trophoblasts, seminal vesicle cells and sperms. These antigens seem to be associated with the membrane cofactor protein (MCP) and the CD46 antigen. Alloantibodies to TLX antigens with Fc tau RII-blocking features were obtained by transfusion of leucocytes or platelets. Preliminary population studies revealed that alloantibodies to TLX/CD46/MCP recognize four overlapping specificities. The terminology TLX-B was introduced with specificities TLX-B1, B2, B3, B4 and frequencies obtained in the population were: 38%, 46%, 42% and 26%, respectively. Family studies showed an independent segregation of the TLX and HLA alleles. At the cellular protein on trophoblast, the alloantibody detected a glycoprotein of 66-67 kDa molecular mass, which may correspond to the alpha chain of the TLX/CD46/MCP isotypes. A direct association of the alloantibody with Fc tau RII could be excluded thus its FcR blocking feature is probably based on an indirect functional effect. After transfusion and in pregnancy the induction of TLX alloantibody production depended on the mismatching in the TLX/CD46/MCP phenotypes. Probable associations were revealed in the case of recurrent habitual abortion between the lack of Fc tau R blocking antibody production and the matched TLX specificities of the couples. After transfusion, TLX alloantibody production with Fc tau R and MLR blocking function was induced only when the recipient was lacking the TLX specificities expressed on the donor cells. Suppression of MLR was found only when TLX specificity in sera corresponded to the TLX specificity of the effector cell. The immunopathological importance of these findings in transplantation and reproductive medicine has yet to be clarified.

Abortion, Habitual↗
PubMed1994

[Detection of gamma-interferon mRNA in JEG-3 choriocarcinoma cell line by means of polymerase chain reaction].

To investigate the pathogenesis of choriocarcinoma the authors employed a newly developed gene amplification method by reverse polymerase chain reaction for the detection of gamma-interferon messenger RNA in JEG-3 choriocarcinoma cell line. Polymerase chain reaction products were analysed by agarose gel electrophoresis. Using 1 Kb DNA ladder as a marker, 84 base-pair fragment was selectively amplified correlating with published gamma-interferon gene fragment length. Because cDNA contains a virtually complete copy of the mRNA this method provides an evidence for the expression of gamma-interferon gene in JEG-3 choriocarcinoma cell line. Based on these results a potential autocrine mechanism may be present in JEG-3 choriocarcinoma cell line.

Choriocarcinoma↗
PubMed1992

Tetraploidy in human placenta. A dilemma in molar and non-molar pregnancies.

17 cases of partial molar pregnancy were analysed cytogenetically by the direct-preparation method. Eight partial moles were triploid, 7 diploid/tetraploid mosaic, and 2 tetraploid. In the course of prenatal cytogenetic screening, out of 1,263 chorionic villus samplings, 2 tetraploid and 1 diploid/tetraploid cases were found. These cases of partial moles do not fit into the usual patterns of triploid partial moles. The findings presented here suggest that different causative factors may be involved in the origin of molar degenerations. These results also call to attention that tetraploidy is an existent and relatively common abnormality.

Adult↗
PubMed1990

Updated screening protocol for abortion services.

We performed 2976 first-trimester abortions at our outpatient center in 1986. In 16 cases (0.54%), products of conception could not be confirmed histologically, although history, bimanual pelvic examination, and urine pregnancy test were suggestive of pregnancy. In 1987-1988, we prospectively evaluated 6689 women presenting for first-trimester abortions. Adding sonography and a semiquantitative serum hCG test to our earlier protocol, we were able to date and locate accurately 6510 pregnancies (97.3%) at the first visit. The remaining 179 patients (2.7%) required only one follow-up visit for final evaluation. This protocol reduced the number of visits for accurate evaluation of pregnancy and eliminated the risk of unnecessary curettage and unplanned second-trimester abortions.

Abortion, Induced↗
PubMed1988

[Partial mole with lung metastases and multiple abnormalities of the fetus].

The authors report on a patient with partial mole, multiple malformations and lung metastases requiring chemotherapy. This case shows that the partial hydatidiform mole must therefore be carefully monitored by serial beta-hCG titres following evacuation to ensure the achievement of complete sustained remission.

Abnormalities, Multiple↗
PubMed1986

[Modern treatment of hydatidiform mole].

Authors describe their experiences in forty seven cases of molar pregnancy. Modern techniques (hCG beta-subunit radioimmunoassay, computerized tomography, pelvic angiography, ultrasonography, prophylactic chemotherapy) are described with regard to diagnosis and treatment of hydatidiform mole. The advantages of trophoblastic disease centers are emphasized.

Abortion, Induced↗