Christina C. Apodaca

Perinatal outcome following fetal single umbilical artery diagnosis

Objective : We report the frequency of associated congenital abnormalities in fetuses with a single umbilical artery as well as the sensitivity, specificity, positive predictive value and negative predictive value of ultrasound for detecting these abnormalities. We also report the pregnancy outcome of fetuses complicated by single umbilical artery, both isolated and with other congenital anomalies. Methods : All pregnancies complicated by fetal single umbilical artery from 1995 to 1999 were identified. A retrospective chart review was performed on both the prenatal records and the ultrasound records of these pregnancies, determining the nature and incidence of other congenital abnormalities. Delivery data were collected to include gestational age at delivery, Apgar score, birth weight, mode of delivery, fetal gender and any complications. 011 Results : Ninety-two pregnancies were identified with a fetal single umbilical artery, of which outcome data were available for 65. Forty-eight (74%) cases were identified as isolated single umbilical artery. Seventeen (26%) cases had other congenital abnormalities. High-resolution ultrasound had 100% sensitivity and specificity for identifying single umbilical artery and an 85% sensitivity and 98% specificity for detecting other congenital abnormalities. Compared to isolated single umbilical artery, pregnancies complicated by single umbilical artery with other abnormalities had a statistically significantly increased rate of fetal aneuploidy, lower birth weight, preterm delivery and Cesarean delivery. Conclusion : Pregnancies complicated by fetal single umbilical artery, especially when associated with other congenital abnormalities, are at increased risk for adverse pregnancy outcome.

Gender reassignment surgery and the gynecological patient

With the increasing number of open transsexuals in the population and the advances in reconstructive surgical techniques, gender reassignment surgery has been increasing since the 1960s. Secondary to the increase in patients undergoing gender reassignment surgery, the practicing gynecologist is more likely to encounter a transsexual patient. A 49-year-old, nulligravid, white female presented to the gynecology clinic for her annual gynecological exam. Her past surgical history was significant for male to female gender reassignment surgery in 1991. Her hormonal medications included levothyroxine and estrogen. She described a strong family history of breast cancer for which she was being followed in our institutional Breast Watch Clinic. On physical examination, findings were notable for surgically constructed female external genitalia and a neovagina. The rectal exam was normal and failed to demonstrate any prostate pathology. It is important for the experienced gynecologist to be familiar with transsexualism, the reconstructive surgery involved, the surgical complications, and gender identity support groups and clinics available to these patients. Transsexuals should be treated to the extent possible like other female gynecological patients, while care is taken not to overlook underlying or preexisting medical conditions, including conditions unique to the prior and new genders.

Effects of lipopolysaccharide on interleukin-6 production in perfused human placental cotyledons

OBJECTIVE To determine if lipopolysaccharide (LPS) alters production of interleukin-6 (IL-6) or vascular tone in perfused placental cotyledons. METHODS Control and study cotyledons from nine placentas were perfused for 3 h. Study cotyledons received LPS in concentrations of 0.01 mcg/ml (n = 3), 0.1 mcg/ml (n = 3), or 1.0 mcg/ml (n = 3). Effluents were collected at 30, 60, 120, and 180 min following infusion with LPS. IL-6 concentrations were measured by enzyme-linked immunosorbant assay. Perfusion pressures were recorded at 10-min intervals. Data were analyzed using ANOVA for repeated measures. RESULTS IL-6 production significantly increased over time in both the study and control cotyledons (P = 0.002). LPS treatment did not affect IL-6 production (P = 0.85) and there were no observable dose effects (P = 0.13). Perfusion pressures did not differ (P = 0.16). CONCLUSIONS The isolated perfused placental cotyledon produces IL-6 and concentrations increase over time. LPS does not alter production of IL-6 or fetoplacental vascular tone.

Parental Decision-Making Differences between Patients in Two Healthcare Systems for Choroid Plexus Cysts

Objective: We evaluated the medical-sociological implications of parental perception of risk and decision-making choices for prenatally ascertained choroid plexus cysts (CPCs) between two obstetric populations with similar clinical situations. Methods: The Wayne State University (WSU) Reproductive Genetics database and the Madigan Army Medical Center (MAMC) experience were reviewed to compare the rates of aneuploidy and invasive testing for cases with CPC. Aneuploidy rates were compared between those with isolated CPC, CPC with advanced maternal age (AMA), and CPC associated with multiple anomalies. Results: 186 cases were identified in the WSU cohort, of whom 27 (15%) declined invasive fetal testing. In the remaining 159 cases, aneuploidy was present in 2/132 (1.5%) isolated CPCs, 3/11 (27%) CPCs with AMA, and 15/16 (93%) CPCs with multiple anomalies. 107 cases were identified in the MAMC cohort, of whom 99 (92%) declined invasive fetal testing. No cases of aneuploidy were found in the 3/12 AMA cases or 5/95 non-AMA cases who underwent amniocentesis. Conclusions: The 2 cases of aneuploidy with isolated CPC cannot be ignored, and provide an estimated attributable risk of at least 0.8%, a higher risk than 38 years of age. However, the parental sociologic context may be as important as the genetic-prognostic risk for decision-making.

Fetal growth curves for an ethnically diverse military population: the American Institute of Ultrasound in Medicine-accredited platform experience.

OBJECTIVE To determine which fetal growth curve provided the best estimates of fetal weight for a cohort of ethnically diverse patients at sea level. METHODS The study consisted of a population of 1,729 fetuses examined at sea level between January 1, 1997, and June 30, 2000, at 18 weeks, 28 weeks, and term. Gestational age (GA) based on menstrual dates was confirmed or adjusted by crown-rump length or early second-trimester biometry. Fetal weight was estimated by using biparietal diameter, head circumference, abdominal circumference, and femur length. Our fetal growth curves were analyzed with fourth-order polynomial regression analysis, applying four previously defined formulae for fetal growth. RESULTS Fetal growth curves for estimated fetal weight demonstrated the expected parabolic shape, which varied according to the formulae used. Our curve best fit the following equation: estimated fetal weight = 4.522 - 0.22 x GA age + 0.25 x GA(2) - 0.001 x GA(3) + 5.248 x 10(-6) x GA(4) (R2 = 0.976). SD increased in concordance with GA. CONCLUSION Madigan Army Medical Center serves a racially mixed, culturally diverse, military community with unrestricted access to prenatal care. Determination of the optimal population-appropriate growth curve at the correct GA assists clinicians in identifying fetuses at risk for growth restriction or macrosomia and therefore at risk for increased perinatal morbidity and death.