Trabalhos Originais Archives - Page 2 of 51 - Revista Brasileira de Ginecologia e Obstetrícia
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):413-418
DOI 10.1590/S0100-72032003000600005
PURPOSE: to determine the existence of association between blood pressure rise and plasma ANP and BNP levels in pregnancies complicated by preeclampsia, considering the existence of a hypertensive state before pregnancy and supportive drug influence on these hormones. METHODS: in a case-control transversal study, 86 pregnant women were assessed regarding arterial pressure level and plasma ANP and BNP levels. Clinical and laboratory tests were carried out to diagnose preeclampsia and the use of hypotensive drugs and magnesium sulfate was considered. Hormone determinations were obtained through radioimmunoassay, after extraction in C18 Sep-pak columns. Correlation was investigated by means and regression analysis in the whole group of pregnant women and in specific groups, considering prior hypertension. RESULTS: plasma ANP values were 41.5±7.3, 78.4±13.1 and 89.2±13.4pg/mL (p<0.00001) and plasma BNP values were 79.5±15.8, 176.7±42.2 and 208.3±63.5 pg/mL (p=0.005), respectively, for mean blood pressure =107 mmHg, 107-139 mmHg and =140 mmHg. It was verified that the positive correlation between plasma ANP concentrations and pressure levels in preeclampsia did not depend on the existence of a hypertensive state before pregnancy (p<0.0001: preeclampsia and p<0.01: preeclampsia superimposed on chronic hypertension), whereas BNP dosages were not associated with the arterial pressure in the group with arterial hypertension prior to pregnancy (p=0.004: preeclampsia and p=0.18: preeclampsia superimposed on chronic hypertension). CONCLUSION: aggravation of hypertension in preeclampsia correlates with serum ANP and BNP concentrations, although BNP values may be influenced by the existence of a prior hypertensive state.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):413-418
DOI 10.1590/S0100-72032003000600005
PURPOSE: to determine the existence of association between blood pressure rise and plasma ANP and BNP levels in pregnancies complicated by preeclampsia, considering the existence of a hypertensive state before pregnancy and supportive drug influence on these hormones. METHODS: in a case-control transversal study, 86 pregnant women were assessed regarding arterial pressure level and plasma ANP and BNP levels. Clinical and laboratory tests were carried out to diagnose preeclampsia and the use of hypotensive drugs and magnesium sulfate was considered. Hormone determinations were obtained through radioimmunoassay, after extraction in C18 Sep-pak columns. Correlation was investigated by means and regression analysis in the whole group of pregnant women and in specific groups, considering prior hypertension. RESULTS: plasma ANP values were 41.5±7.3, 78.4±13.1 and 89.2±13.4pg/mL (p<0.00001) and plasma BNP values were 79.5±15.8, 176.7±42.2 and 208.3±63.5 pg/mL (p=0.005), respectively, for mean blood pressure =107 mmHg, 107-139 mmHg and =140 mmHg. It was verified that the positive correlation between plasma ANP concentrations and pressure levels in preeclampsia did not depend on the existence of a hypertensive state before pregnancy (p<0.0001: preeclampsia and p<0.01: preeclampsia superimposed on chronic hypertension), whereas BNP dosages were not associated with the arterial pressure in the group with arterial hypertension prior to pregnancy (p=0.004: preeclampsia and p=0.18: preeclampsia superimposed on chronic hypertension). CONCLUSION: aggravation of hypertension in preeclampsia correlates with serum ANP and BNP concentrations, although BNP values may be influenced by the existence of a prior hypertensive state.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):419-423
DOI 10.1590/S0100-72032003000600006
PURPOSE: to evaluate the perinatal outcomes of pregnancies complicated by oligohydramnios, not due to premature rupture of membranes (PRM), diagnosed until the 26th week of gestation. PATIENTS AND METHODS: we analyzed retrospectively the cases of oligohydramnios that occurred from January 1994 to December 2000, and were diagnosed until the 26th week of gestation. Oligohydramnios was present when the amniotic fluid index was less or equal to 5.0 cm. After diagnosis the patients were followed-up with serial ultrasound evaluation, with emphasis on the maintenance of the oligohydramnios state. When remission of the oligohydramnios occurred, patients remained in the study. Cases due to PRM, fetal death detected on the first examination and the women who gave birth in another institution were excluded from the study. Concerning the patients, the presence of clinical and obstetric diseases was investigated. As regards the newborns, we evaluated birth weight, time of admission/death, occurrence of death or malformations. RESULTS: twenty-seven cases of oligohydramnios were analyzed. Thirteen fetuses had congenital anomalies, and among them, eight had anomalies of the urinary tract, four of the nervous system and one had cystic hygroma. Fourteen patients had a clinical or an obstetric disease, mainly hypertension (10 cases). In addition, we found three cases of placenta previa and one case of thyropathy. There were thirteen fetal deaths and fourteen neonatal deaths. CONCLUSION: oligohydramnios not due to PRM, occurring in the second trimester of gestation, independent of the etiology or the presence of congenital anomalies, was associated with a fatal perinatal result.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):419-423
DOI 10.1590/S0100-72032003000600006
PURPOSE: to evaluate the perinatal outcomes of pregnancies complicated by oligohydramnios, not due to premature rupture of membranes (PRM), diagnosed until the 26th week of gestation. PATIENTS AND METHODS: we analyzed retrospectively the cases of oligohydramnios that occurred from January 1994 to December 2000, and were diagnosed until the 26th week of gestation. Oligohydramnios was present when the amniotic fluid index was less or equal to 5.0 cm. After diagnosis the patients were followed-up with serial ultrasound evaluation, with emphasis on the maintenance of the oligohydramnios state. When remission of the oligohydramnios occurred, patients remained in the study. Cases due to PRM, fetal death detected on the first examination and the women who gave birth in another institution were excluded from the study. Concerning the patients, the presence of clinical and obstetric diseases was investigated. As regards the newborns, we evaluated birth weight, time of admission/death, occurrence of death or malformations. RESULTS: twenty-seven cases of oligohydramnios were analyzed. Thirteen fetuses had congenital anomalies, and among them, eight had anomalies of the urinary tract, four of the nervous system and one had cystic hygroma. Fourteen patients had a clinical or an obstetric disease, mainly hypertension (10 cases). In addition, we found three cases of placenta previa and one case of thyropathy. There were thirteen fetal deaths and fourteen neonatal deaths. CONCLUSION: oligohydramnios not due to PRM, occurring in the second trimester of gestation, independent of the etiology or the presence of congenital anomalies, was associated with a fatal perinatal result.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):425-430
DOI 10.1590/S0100-72032003000600007
PURPOSE: to determine whether prenatal sonographic findings and uterine contractions can predict neonatal motor outcome in fetuses with open spina bifida. METHODS: we evaluated retrospectively 53 fetuses with open spina bifida from 1993 to 2001. These fetuses were born and followed-up at the fetal medicine units of the Hospital São Paulo ("Universidade Federal de São Paulo") and the "Hospital Santa Joana". The influence of the alterations observed through ultrasound scan on neonatal muscular strength (macrocrania, microcrania, level of the spinal column opening, clubfoot and type of fetus position) was evaluated. The influence of uterine contractions on neonatal motor outcome was also evaluated. All deliveries were made through cesarian section. c² and Fisher tests were used for categorical comparisons. A p<0.05 was considered significant. RESULTS: Fifty-three cases of isolated open spina bifida were studied. Alterations of the cranial circumference size and the level of the lesion did not interfere in the neonatal motor perfomance. However, clubfoot and breech position showed to be predictors of an unfavorable neurological prognosis (p<0.05). Twenty-tree (43%) infants had clubfoot. Eighteen (78.3%) of these had abnormal leg movements. No infant in breech presentation (n=10) showed normal motor function. The presence of uterine contractions and the premature membrane rupture, observed in 13 fetuses (87%), were also linked to the alteration of neonatal muscular strength (p<0.05). CONCLUSION: clubfoot and breech presentation are ultrasonographic findings useful in predicting neurological neonatal outcome. Uterine contractions and premature membrane rupture are associated with poor motor neonatal outcome.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):425-430
DOI 10.1590/S0100-72032003000600007
PURPOSE: to determine whether prenatal sonographic findings and uterine contractions can predict neonatal motor outcome in fetuses with open spina bifida. METHODS: we evaluated retrospectively 53 fetuses with open spina bifida from 1993 to 2001. These fetuses were born and followed-up at the fetal medicine units of the Hospital São Paulo ("Universidade Federal de São Paulo") and the "Hospital Santa Joana". The influence of the alterations observed through ultrasound scan on neonatal muscular strength (macrocrania, microcrania, level of the spinal column opening, clubfoot and type of fetus position) was evaluated. The influence of uterine contractions on neonatal motor outcome was also evaluated. All deliveries were made through cesarian section. c² and Fisher tests were used for categorical comparisons. A p<0.05 was considered significant. RESULTS: Fifty-three cases of isolated open spina bifida were studied. Alterations of the cranial circumference size and the level of the lesion did not interfere in the neonatal motor perfomance. However, clubfoot and breech position showed to be predictors of an unfavorable neurological prognosis (p<0.05). Twenty-tree (43%) infants had clubfoot. Eighteen (78.3%) of these had abnormal leg movements. No infant in breech presentation (n=10) showed normal motor function. The presence of uterine contractions and the premature membrane rupture, observed in 13 fetuses (87%), were also linked to the alteration of neonatal muscular strength (p<0.05). CONCLUSION: clubfoot and breech presentation are ultrasonographic findings useful in predicting neurological neonatal outcome. Uterine contractions and premature membrane rupture are associated with poor motor neonatal outcome.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):431-436
DOI 10.1590/S0100-72032003000600008
PURPOSE: to analyze maternal death cases that occurred at the "Hospital de Clínicas de Porto Alegre", a reference university hospital for high-risk pregnancies in the state of Rio Grande do Sul, Brazil. METHODS: we carried out a retrospective study of medical records of 10- to 49-year-old women who died at the hospital between 1980 and 1999. Deaths related to pregnancy and puerperium were analyzed independently of the kind and duration of pregnancy. The causes were classified into direct obstetric, indirect obstetric and nonobstetric, according to their association with pregnancy, delivery and puerperium disorders. RESULTS: a total of 81 patients with a mean age of 28.5 years were studied. The maternal mortality rate was 109 per 100,000 live births. Direct obstetric causes made up 61.7% of deaths. Indirect causes made up 23.5% of deaths. Nonobstetric causes made up 15.0% of the total. Among direct obstetric causes, arterial hypertension (18.5%), post-cesarean infection (16%), and septic abortion (12.3%) were the most prevalent. The main maternal mortality events among indirect obstetric causes were cardiopathy (8.6%), acute fatty liver disease (3.5%), and systemic lupus erythematosus (2.5%). Among the nonobstetric causes, malignant neoplasia (7.4%) and AIDS (3.7%) were the most important. CONCLUSIONS: the prevailing causes of maternal death have not changed in the last two decades. The main cause is still hypertension. There is an expressive number of deaths related to cesarean section and infections. The high prevalence of direct obstetric causes shows the low maternal mortality prevention capacity of our health care system.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):431-436
DOI 10.1590/S0100-72032003000600008
PURPOSE: to analyze maternal death cases that occurred at the "Hospital de Clínicas de Porto Alegre", a reference university hospital for high-risk pregnancies in the state of Rio Grande do Sul, Brazil. METHODS: we carried out a retrospective study of medical records of 10- to 49-year-old women who died at the hospital between 1980 and 1999. Deaths related to pregnancy and puerperium were analyzed independently of the kind and duration of pregnancy. The causes were classified into direct obstetric, indirect obstetric and nonobstetric, according to their association with pregnancy, delivery and puerperium disorders. RESULTS: a total of 81 patients with a mean age of 28.5 years were studied. The maternal mortality rate was 109 per 100,000 live births. Direct obstetric causes made up 61.7% of deaths. Indirect causes made up 23.5% of deaths. Nonobstetric causes made up 15.0% of the total. Among direct obstetric causes, arterial hypertension (18.5%), post-cesarean infection (16%), and septic abortion (12.3%) were the most prevalent. The main maternal mortality events among indirect obstetric causes were cardiopathy (8.6%), acute fatty liver disease (3.5%), and systemic lupus erythematosus (2.5%). Among the nonobstetric causes, malignant neoplasia (7.4%) and AIDS (3.7%) were the most important. CONCLUSIONS: the prevailing causes of maternal death have not changed in the last two decades. The main cause is still hypertension. There is an expressive number of deaths related to cesarean section and infections. The high prevalence of direct obstetric causes shows the low maternal mortality prevention capacity of our health care system.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):437-442
DOI 10.1590/S0100-72032003000600009
PURPOSE: to study the evolution of the resistance and pulsatility indices, maximum velocity, final diastolic velocity and time of acceleration of the middle cerebral artery of fetuses between 22 and 38 weeks of gestation. METHODS: a prospective and longitudinal observational study was conducted on 33 fetuses of normal pregnant women evaluated between 22 and 38 weeks of pregnancy. The gestational age was determined on the basis of the date of the last menstruation and/or by ultrasound examination during the first trimester. Doppler ultrasound examination was performed by a single observer using an Image Point 1800 (Hewlett Packard) apparatus equipped with a multiple frequency transducer. For the acquisition of the Doppler tracing of the middle cerebral artery, the sample indicator was calibrated for a sample volume of 1 mm³ and placed on the anterior middle cerebral artery as close as possible to the skullcap. The insonation angle was kept between 5º and 19º and the filter was adjusted to a frequency of 50-100 Hz. The newborn infants were evaluated in order to confirm that the fetuses were vigorous and adequate for gestational age. RESULTS: the results obtained for the resistance and pulsatility indices revealed a 2nd-degree equation, representing a parabola whose values for the resistance index were 0.81 during the 22nd week and 0.75 during the 38th week. The pulsatility index was 1.59 during the 22nd week and 1.45 during the 38th week. Maximum systolic velocity increased progressively along pregnancy, with values of 26.3 cm/s during the 22nd week and 57.7 cm/s during the 38th week. Final diastolic velocity increased progressively from the 26th week (5.21 cm/s) to term (14.6 cm/s). Acceleration time increased significantly only between 26 and 30 weeks, with values of 0.04 s during the 26th week and 0.05 s during the 30th week. CONCLUSION: it was concluded that the evolution of the resistance and pulsatility indices and of maximum systolic velocity were similar to those of most studies described in the literature. Acceleration time presented few modifications during the evaluated gestational weeks.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):437-442
DOI 10.1590/S0100-72032003000600009
PURPOSE: to study the evolution of the resistance and pulsatility indices, maximum velocity, final diastolic velocity and time of acceleration of the middle cerebral artery of fetuses between 22 and 38 weeks of gestation. METHODS: a prospective and longitudinal observational study was conducted on 33 fetuses of normal pregnant women evaluated between 22 and 38 weeks of pregnancy. The gestational age was determined on the basis of the date of the last menstruation and/or by ultrasound examination during the first trimester. Doppler ultrasound examination was performed by a single observer using an Image Point 1800 (Hewlett Packard) apparatus equipped with a multiple frequency transducer. For the acquisition of the Doppler tracing of the middle cerebral artery, the sample indicator was calibrated for a sample volume of 1 mm³ and placed on the anterior middle cerebral artery as close as possible to the skullcap. The insonation angle was kept between 5º and 19º and the filter was adjusted to a frequency of 50-100 Hz. The newborn infants were evaluated in order to confirm that the fetuses were vigorous and adequate for gestational age. RESULTS: the results obtained for the resistance and pulsatility indices revealed a 2nd-degree equation, representing a parabola whose values for the resistance index were 0.81 during the 22nd week and 0.75 during the 38th week. The pulsatility index was 1.59 during the 22nd week and 1.45 during the 38th week. Maximum systolic velocity increased progressively along pregnancy, with values of 26.3 cm/s during the 22nd week and 57.7 cm/s during the 38th week. Final diastolic velocity increased progressively from the 26th week (5.21 cm/s) to term (14.6 cm/s). Acceleration time increased significantly only between 26 and 30 weeks, with values of 0.04 s during the 26th week and 0.05 s during the 30th week. CONCLUSION: it was concluded that the evolution of the resistance and pulsatility indices and of maximum systolic velocity were similar to those of most studies described in the literature. Acceleration time presented few modifications during the evaluated gestational weeks.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2000;22(7):401-411
DOI 10.1590/S0100-72032000000700002
Purpose: to analyze the relationship between White's classification and the histopathological, changes occurring in the placentas of diabetic pregnant women, performing a qualitative comparison of histopathological changes in the placentas of nondiabetic pregnant women with those in diabetic ones (classes A and A/B), clinical, short duration (classes B and C), and clinical with vasculopathy (classes D to FRH), studying the influence of the quality of glycemic control and of gestational age on placental changes in the three groups of diabetic pregnant women. Patients and methods: specimens of placentas were collected from all diabetic pregnant women seen between 1991 and 1996 in the Maternity Section of the Hospital das Clínicas, Faculdade de Medicina de Botucatu, stained using the hematoxylin-eosin technique, and submitted to a histopathological examination. The quality of glycemic control was analyzed by the glycemia average of gestation and classified as adequate or inadequate, with a limit of 120 mg/dl. Gestational age was individualized as term and preterm. Results: forty-two newborns (43.3%) were born at term and the remaining were preterm (56.7%). The prematurity rate was higher for women with clinical diabetes (classes B and C; D to FRH). Some histopathological alterations were observed only in placentas from diabetic pregnant women: cystoid degeneration, chorial edema, intima edema, dysmaturity, Hofbauer cell hyperplasia, villitis, ghost cells, two vessels in the umbilical cord, and endarteritis. Conclusions: histopathological changes in the placentas of pregnant women with gestational diabetes (classes A and A/B), clinical, short duration (classes B and C), and clinical with vasculopathy (classes D to FRH) were similar to those in the nondiabetic ones, and, therefore, were independent of White's clinical classification. The histopathological changes in the placentas of pregnant women with gestational diabetes (classes A and A and B), clinical, short duration (classes B and C), and clinical with vasculopathy (classes D to FRH) were not related to gestational age at birth and to the quality of glycemic control of the mother. The comparison between histopathological changes and the increased number of preterm newborns in clinical diabetes, class D to FRH, suggest early placental ageing in clinical diabetes patients.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2000;22(7):401-411
DOI 10.1590/S0100-72032000000700002
Purpose: to analyze the relationship between White's classification and the histopathological, changes occurring in the placentas of diabetic pregnant women, performing a qualitative comparison of histopathological changes in the placentas of nondiabetic pregnant women with those in diabetic ones (classes A and A/B), clinical, short duration (classes B and C), and clinical with vasculopathy (classes D to FRH), studying the influence of the quality of glycemic control and of gestational age on placental changes in the three groups of diabetic pregnant women. Patients and methods: specimens of placentas were collected from all diabetic pregnant women seen between 1991 and 1996 in the Maternity Section of the Hospital das Clínicas, Faculdade de Medicina de Botucatu, stained using the hematoxylin-eosin technique, and submitted to a histopathological examination. The quality of glycemic control was analyzed by the glycemia average of gestation and classified as adequate or inadequate, with a limit of 120 mg/dl. Gestational age was individualized as term and preterm. Results: forty-two newborns (43.3%) were born at term and the remaining were preterm (56.7%). The prematurity rate was higher for women with clinical diabetes (classes B and C; D to FRH). Some histopathological alterations were observed only in placentas from diabetic pregnant women: cystoid degeneration, chorial edema, intima edema, dysmaturity, Hofbauer cell hyperplasia, villitis, ghost cells, two vessels in the umbilical cord, and endarteritis. Conclusions: histopathological changes in the placentas of pregnant women with gestational diabetes (classes A and A/B), clinical, short duration (classes B and C), and clinical with vasculopathy (classes D to FRH) were similar to those in the nondiabetic ones, and, therefore, were independent of White's clinical classification. The histopathological changes in the placentas of pregnant women with gestational diabetes (classes A and A and B), clinical, short duration (classes B and C), and clinical with vasculopathy (classes D to FRH) were not related to gestational age at birth and to the quality of glycemic control of the mother. The comparison between histopathological changes and the increased number of preterm newborns in clinical diabetes, class D to FRH, suggest early placental ageing in clinical diabetes patients.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2000;22(7):413-419
DOI 10.1590/S0100-72032000000700003
Purpose: to analyze maternal complications and perinatal results of triplet pregnancies. Method: retrospective study of maternal and perinatal data on all triplets weighing >500 g delivered in a period of 8 years at Maternidade Escola de Vila Nova Cachoeirinha. Results: between 1990-1998, 18 women gave birth to triplets, representing 1 in every 2,060 deliveries. The main complications were preterm delivery (94.4%) and preeclampsia (44.4%) and 83.3% of these patients needed hospitalization before delivery, for 1-50 days, most in order to inhibit preterm labor. Cesarean section was performed in 88.9%, the mean gestational age at birth was 34.2 weeks (+ 1.8), mean weight 1,827 g (+ 421), 20.4% weighed <1,500 g and 75.9% weighed 1,500-2,499 g. Birth weight discrepancy (> 25%) occurred in 38.9% of these pregnancies and 35.2% of the 54 fetuses were small for gestational age. Eighty-six percent of live-born infants had neonatal morbidity and 3.7% had evident congenital anomalies. Perinatal mortality was 16.7%, 7.4% due to intrauterine demise and 9.3% due to neonatal death. The mean duration of hospitalization in the neonatal ward was 18.5 days; late neonatal sepsis was the main cause of death. Conclusion: triplet pregnancies had high a incidence of obstetric complications, demanded prolonged maternal hospitalization and ended almost always in surgical delivery. Intrauterine and neonatal death rates were high, neonatal morbidity was detected in almost all live-born infants and their hospitalization was long, exposing these prematures to infection, their main cause of death. Triplet pregnancies carry high maternal and fetal risks and should be managed at tertiary facilities.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2000;22(7):413-419
DOI 10.1590/S0100-72032000000700003
Purpose: to analyze maternal complications and perinatal results of triplet pregnancies. Method: retrospective study of maternal and perinatal data on all triplets weighing >500 g delivered in a period of 8 years at Maternidade Escola de Vila Nova Cachoeirinha. Results: between 1990-1998, 18 women gave birth to triplets, representing 1 in every 2,060 deliveries. The main complications were preterm delivery (94.4%) and preeclampsia (44.4%) and 83.3% of these patients needed hospitalization before delivery, for 1-50 days, most in order to inhibit preterm labor. Cesarean section was performed in 88.9%, the mean gestational age at birth was 34.2 weeks (+ 1.8), mean weight 1,827 g (+ 421), 20.4% weighed <1,500 g and 75.9% weighed 1,500-2,499 g. Birth weight discrepancy (> 25%) occurred in 38.9% of these pregnancies and 35.2% of the 54 fetuses were small for gestational age. Eighty-six percent of live-born infants had neonatal morbidity and 3.7% had evident congenital anomalies. Perinatal mortality was 16.7%, 7.4% due to intrauterine demise and 9.3% due to neonatal death. The mean duration of hospitalization in the neonatal ward was 18.5 days; late neonatal sepsis was the main cause of death. Conclusion: triplet pregnancies had high a incidence of obstetric complications, demanded prolonged maternal hospitalization and ended almost always in surgical delivery. Intrauterine and neonatal death rates were high, neonatal morbidity was detected in almost all live-born infants and their hospitalization was long, exposing these prematures to infection, their main cause of death. Triplet pregnancies carry high maternal and fetal risks and should be managed at tertiary facilities.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2000;22(7):429-433
DOI 10.1590/S0100-72032000000700005
Purpose: to study the monoclonal antibody MIB-1 in the normal breast epithelium adjacent to a fibroadenoma in women in the luteal phase of the menstrual cycle treated with tamoxifen. Patients and methods: the proliferative activity of the mammary epithelium adjacent to the fibroadenoma was studied by immunohistochemistry based on immunoexpression of the monoclonal antibody MIB-1. The study was randomized and double blind and was conducted on 44 women with fibroadenomas, divided into 3 groups: A (n = 16; placebo), B (n = 15; tamoxifen, 10 mg), and C (n = 13; tamoxifen, 20 mg). Tamoxifen was administered for 22 days starting on the 2nd day of the menstrual cycle and a biopsy was taken on the 23rd day. Results: the mean percentage of stained nuclei per 1000 cells was 9.2 in group A, 4.5 in group B, and 3.2 in group C. Fisher's test revealed that tamoxifen significantly reduced the immunoexpression of MIB-1 at the doses of 10 and 20 mg compared to the placebo group (p<0.0001), with no significant differences between doses in terms of proliferative activity (p = 0.21). Conclusion: we conclude that tamoxifen significantly reduced the proliferative activity of the mammary epithelium at the doses of 10 and 20 mg/day.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2000;22(7):429-433
DOI 10.1590/S0100-72032000000700005
Purpose: to study the monoclonal antibody MIB-1 in the normal breast epithelium adjacent to a fibroadenoma in women in the luteal phase of the menstrual cycle treated with tamoxifen. Patients and methods: the proliferative activity of the mammary epithelium adjacent to the fibroadenoma was studied by immunohistochemistry based on immunoexpression of the monoclonal antibody MIB-1. The study was randomized and double blind and was conducted on 44 women with fibroadenomas, divided into 3 groups: A (n = 16; placebo), B (n = 15; tamoxifen, 10 mg), and C (n = 13; tamoxifen, 20 mg). Tamoxifen was administered for 22 days starting on the 2nd day of the menstrual cycle and a biopsy was taken on the 23rd day. Results: the mean percentage of stained nuclei per 1000 cells was 9.2 in group A, 4.5 in group B, and 3.2 in group C. Fisher's test revealed that tamoxifen significantly reduced the immunoexpression of MIB-1 at the doses of 10 and 20 mg compared to the placebo group (p<0.0001), with no significant differences between doses in terms of proliferative activity (p = 0.21). Conclusion: we conclude that tamoxifen significantly reduced the proliferative activity of the mammary epithelium at the doses of 10 and 20 mg/day.
