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Biomedical subjects

Z Singer

Publications and source records attributed to Z Singer.

16 recordsLinked to original sources
PubMed1991

Transabdominal placental biopsy in the second and third trimester of pregnancy.

Transabdominal placental biopsy under ultrasound guidance was carried out in 260 cases in the second trimester and 50 cases in the third trimester of pregnancy. Placental tissue was aspirated using an 18 or 20 gauge needle. In a total of 310 placental biopsies in the second and third trimester, 100 were performed because of suspicious ultrasonographic findings. Placental biopsy is simple in the presence of severe oligohydramnios where fetal blood sampling is usually more difficult. Oligohydramnios and polyhydramnios were the ultrasonographic findings in 50% of cases and were found to be associated with 30% of abnormal chromosomal findings. There was one (0.3%) abortion within two weeks following placental biopsy. Placental biopsy did not affect the outcome of the pregnancy.

Biopsy, Needle↗
PubMed1990

New technique for processing paraffin-embedded tissue for Y chromosome fluorescence identification of trophoblastic disease.

A new reprocessing technique for Y chromosome fluorescent body (q 12 region) detection of trophoblastic disease in previously paraffin-embedded tissues is described. Deparaffinized sections were treated with pronase and trypsin for digestion, followed by hydrolysis with HCl and acetic acid, staining with quinacrine hydrochloride fluorochrome and mounting in Sørensen's phosphate buffer (pH 5.5). Use of the technique resulted in sufficient fluorescence quality and better accuracy for Y and X heterochromatin scoring. The technique yielded the same results in retrospective formalin-fixed, paraffin-embedded trophoblastic specimens as in fresh tissues. The combinations of enzymes and acids and the dosages necessary for optimal results are discussed.

Female↗
PubMed1988

HLA and red blood group antigens in pregnancy disorders.

Total of 356 women with various types of pregnancy disorders as well as their husbands were classified in four groups regarding the type of the disorder as follows: 1. Recurrent spontaneous abortions (RSA) of unknown etiology (N = 105) and RSA - primary aborters only (N = 84); 2. Blighted ovum (N = 80); 3. Rh immunization in pregnancy (N = 90); 4. ABO immunization in pregnancy (N = 47). Two groups of couples were used as controls: 1. Couples randomly taken from forensic medicine cases of paternity evaluation (N = 104); 2. Couples having two or more children with HLA immunization in pregnancy (N = 78). The couples from all groups were typed for red blood group antigens of ABO, Rhesus, MNSs, Kell, Duffy, Lewis, Kidd and P systems and also for HLA antigens. Significantly higher frequency of antigen HLA-A9 was found in women with RSA (corr. p = 0.0003) and in women with pregnancy disorders caused by Rh immunization (corr. p = 0.0136). In couples with RSA the degree of HLA compatibility was significant (p = 0.0048) and the reactivity of spouses in MLR was significantly decreased (p = 0.0001). Significantly, more low responders in MLR were also found among the women with RSA as compared to the controls (p = 0.0217). Two possible pathologic mechanisms may explain the association between HLA antigens and RSA: 1. immunological defects which are linked to HLA-D/DR region causing malfunction of immunosuppressive mechanisms during pregnancy; 2. endocrinological defect which is linked to HLA region as 21-OH hydroxylase deficiency gene.

Female↗
PubMed1979

[Endocrinological aspect of galactorrhea and lactation in relation to the cytology of breast secretion].

The concentration of prolactin in the plasma and the cytologic smears of the mammary extraction were analysed in 67 patients with galactorrhea. In 38 patients galactorrhea was couple with amenorrhea. Out of 67 patients with galactorrhea, 32 had hyperprolactinemia (68.6 +/- 14.4 ng/ml) along with low estrogen (14.6 +/- 3.8 ug/24 hours) and aonadotropin (FSH 6.2 +/- 2.0, LH 8.5 +/- 2.6 mIU/ml) values. In 48 out of 67 patients galactorrhea seceded under the therapy of Parlodel (bromocriptine). Out of 13 patients waiting pregnancy, 9 showed a restitution ofa the ovulatory cycle and 2 became pregnant. In the group of parturients it proved possible to suppress ablactation by estrogenic-and androgenic preparations (Ablacton) without a decrease in the prolactin concentration, while Parlodel brought about ablactation with a decrease of the prolactin concentration to normal values as early as 24 hours following the application of its first dose. In 6 patients with hyperprolactinemia and low estrogaen and gonatropin values an increase in the concentration of LH and FSH after 100 micrograms LH--RH i. m. was observed. In the cytologic smears of the mammary excretion there were no atypical or malignant cells.

Adolescent↗
PubMedDate not supplied

[The effect of vaginal administration of interferon on squamous intraepithelial cervical lesions].

Human papillomavirus vaginal and/or cervical infections were found in 1.98 percent of mostly younger female general populations and in 26.6 percent of cases with abnormal Pap smears. Antiviral treatment with human leukocyte interferon (HLI-alpha) vaginalettes was introduced at the beginning of 1987. In 30 cases a daily dose of 1 x 10(6) IU HLI during two 21-day menstrual cycles was applied. In 137 controls without therapy and the treated group a 12-month follow-up was performed. Every third month the regression, persistence or progression of the cervical squamous intraepithelial lesion (SIL) was determined by cytology and colposcopy. Most of the cases with progression were histologically confirmed. For ethical reasons the placebo treatment of the control group with an identical spectrum of disease was not feasible. Therefore, a secondary analysis and the 2 test were used. Up to now the results show a significant regression (21 out of 30, X2 = 4.51, P less than 0.05) in the treated group and progression (23 out of 137, X2 = 18.41, P less than 0.01) in controls. HLI vaginalettes are easily applicable, without any side-effects.

Administration, Intravaginal↗