Childbirth and myoma treatment by uterine artery occlusion: do they share a common biology?

When the uterine arteries are bilaterally occluded, either by uterine artery embolization or by laparoscopic obstruction, women with myomas experience symptomatic relief. After the uterine arteries are occluded, most blood stops flowing in myometrial arteries and veins, and the uterus becomes ischemic. It is postulated that myomas are killed by the same process that kills trophoblasts: transient uterine ischemia. When the uterine arteries are bilaterally occluded, either by uterine artery embolization (UAE) or by laparoscopic obstruction, women with myomas experience symptomatic relief. After the uterine arteries are occluded, most blood stops flowing in myometrial arteries and veins, and the uterus becomes ischemic. Over time, stagnant blood in these arteries and veins clots. Then, tiny collateral arteries in the broad ligament (including communicating arteries from the ovarian arteries) open, causing clot within myometrium to lyse and the uterus to reperfuse. Myomas, however, do not survive this period of ischemia. This is unique organ response to clot formation and ischemia. What allows the uterus to survive a relatively long period of ischemia while myomas perish? Childbirth appears to be the predicate biology. Following placental separation, the uteroplacental arteries and the draining veins of the placenta are torn apart at their bases in the junctional zone of the myometrium and bleed directly into the uterine cavity. Left unchecked, every woman would bleed to death in less than 10 minutes after placental delivery. Most women do not bleed to death because vessels in the uterus clot after placental delivery. During pregnancy, clotting and lytic factors in blood increase many fold. Following delivery, uterine contractions continue, intermittently, periodically slowing the velocity of flowing blood through myometrium. The combination of slowed blood flow, elevated clotting proteins, and torn placental vessels (known as Virchow's triad) causes blood in myometrial arteries and veins to clot. Fibrinolytic enzymes later lyse clot in arteries and veins not associated with placenta perfusion, and the uterus is reperfused. Remnant placental tissue - primarily uteroplacental arteries and veins - does not survive this period of ischemia. Placental tissue dies and over weeks is sloughed into the uterine cavity. At the same time, residual endometrial tissue grows under the sloughing placental tissue thus re-establishing the endometrial lining. It is postulated that myomas are killed by the same process that kills trophoblasts - transient uterine ischemia.     

Embolization of uterine fibroids and infertility: is a clinical trial conceivable?

Uterine artery embolization is a recent technique intended for treating uterine fibroids, as an alternative to hysterectomy. The possible side effects putting at stake the prognosis of fertility after embolization are considered as a brake to its use for the treatment of infertility associated with myoma. Secondary hysterectomy and permanent amenorrhea are the two main risks. But they are not so frequent and can be prevented. To date, the experience in the field of fertility and pregnancy after arterial embolization for fibroids is quite limited. However, first results are encouraging and not very different from those observed after surgical myomectomy. A therapeutic trial using arterial embolization for the management of fibroids within a context of infertility can be devised in the presence of submucosal or intramural myomas responsible for metromenorrhagia and with no major infertility factors associated. It is likely that uterine artery embolization should provide results equivalent or superior to those of surgical myomectomy in case of numerous and intramural fibroids with no prevailing myoma. Arterial embolization could be also interesting in case of recurrent myoma after laparotomic myomectomy.     

Murphy's Law and the pregnant medical doctor: is pregnancy outcome worse?

The 'Murphy's Law' concept that doctors have a higher incidence of adverse pregnancy outcome is often quoted anecdotally but has never been scientifically tested. A group of medical doctors (n =52) were prospectively matched closely with a group of non-doctors (n =52) and pregnancy outcome was recorded. There were no differences noted in pregnancy outcome between the two groups. Whilst a much larger number of doctors is probably required to show a statistically significant difference, this first small study shows no clinically relevant difference between the two groups. The perception of Murphy's Law and the pregnant medical doctor would appear to be a myth.     

Can flavonoid-rich chocolate modulate arterial elasticity and pathological uterine artery Doppler blood flow in pregnant women? A pilot study

Introduction: Dark chocolate has shown beneficial effects on cardiovascular health and might also modulate hypertensive complications in pregnancy and uteroplacental blood flow. Increased uteroplacental resistance is associated with systemic arterial stiffness. We aimed to investigate the short-term effect of flavonoid-rich chocolate on arterial stiffness and Doppler blood flow velocimetry indexes in pregnant women with compromised uteroplacental blood flow.

Methods: Doppler blood flow velocimetry and digital pulse wave analysis (DPA) were performed in 25 women pregnant in the second and third trimesters with uterine artery (UtA) score (UAS) 3–4, before and after 3 days of ingestion of chocolate with high flavonoid and antioxidant contents. UtA pulsatility index (PI), UtA diastolic notching, UAS (semiquantitative measure of PI and notching combined), and umbilical artery PI were calculated, and DPA variables representing central and peripheral maternal arteries were recorded.

Results: Mean UtA PI (p?=?.049) and UAS (p?=?.025) significantly decreased after chocolate consumption. There were no significant changes in UtA diastolic notching or any DPA indexes of arterial stiffness/vascular tone.

Conclusion: Chocolate may have beneficial effects on the uteroplacental circulation, but in this pilot study, we could not demonstrate effects on arterial vascular tone as assessed by DPA.     

Adenomyosis: what imaging modality in the diagnosis and staging?

Adenomyosis constitutes the most frequent myometrial disorder with leiomyoma. Its clinical diagnosis is often difficult. After giving a histopathologic definition, the semiology, the limits, and the diagnostic role of hysterography, transabdominal and endovaginal sonography and MRI will be discussed.     

Laparoscopic myomectomy for fibroids penetrating the uterine cavity: is it a safe procedure?

Objective The purpose of the study was to evaluate the post-operative course and follow up of women who had undergone laparoscopic removal of intramural fibroids penetrating the uterine cavity.
Design Retrospective study.
Setting Center for Reconstructive Pelvic Endosurgery, Italy.
Population Thirty-four women with fibroids penetrating the uterine cavity.
Methods Laparoscopic myomectomy.
Main outcome measures Feasibility and safety of surgical technique, length of operation, blood loss, intra- or post-operative complications, length of hospital stay, resolution of symptoms and future obstetric outcome.
Results The mean operative time was 79 (SD 30) minutes; the mean reduction in haemoglobin was  1.1 ± 0.9 g/dL  . No intra- or post-operative complications were observed. The average post-operative stay in hospital was 54 (SD 22) hours. Nineteen (73%) out of 26 patients who had experienced symptoms prior to surgery reported resolution of these symptoms post-operatively. All patients resumed work within a mean time of 20 (SD 8) days. Among 23 of the 32 patients attempting pregnancy during the follow up period, nine (39%) conceived within one year. Seven pregnancies went to term without complications.
Conclusion The clinical results of this study suggest that laparoscopic myomectomy for intramural fibroids penetrating the uterine cavity is a safe procedure, providing well known advantages of minimal access surgery.     

Is there a relationship between uterine activity and the length of the cervix in the second trimester?

OBJECTIVE: The purpose of this study was to determine if a relationship could be detected between uterine activity and cervical change in the second trimester. METHODS: Ten women with evidence of cervical change and 10 women with no cervical change (controls) were studied between 20 and 28 weeks gestation. Uterine activity was recorded using home uterine activity monitoring units. Cervical assessment was performed using transvaginal ultrasound. RESULTS: There was no statistically significant difference in the contractions per hour in the cervical change group (1.26 +/- 0.38; mean +/- SEM) compared to the controls (1.13 +/- 0.48) (p 0.48; Mann-Whitney U test). There were significant differences in closed endocervical length (p < 0.001) and internal os dilatation (p 0.004), the cervical change group demonstrating a shorter closed endocervical length and greater internal os dilatation. CONCLUSIONS: This preliminary study shows no evidence of a relationship between uterine activity and endocervical canal length in the second trimester.     

Laparoscopic hysterectomy in the overweight and obese: does 3D imaging make a change?

Purpose

To evaluate the influence of three-dimensional (3D) high-definition (HD) visualisation in laparoscopic hysterectomy in normal weight, overweight and obese women.

Methods

A retrospective analysis of 180 patients undergoing total laparoscopic hysterectomy (TLH: n = 90) or laparoscopic supracervical hysterectomy (LASH: n = 90) was performed. The study collective consisted of 90 women (TLH: n = 45, LASH: n = 45), who underwent laparoscopic hysterectomy with a 3D HD laparoscopic system. Ninety matched (uterine weight, previous surgeries) women with hysterectomy (TLH: n = 45, LASH: n = 45) performed by the same surgeon with conventional two-dimensional laparoscopy formed the control group. Statistical analysis was accomplished stratifying patients according to body mass index (BMI) (≤24.9, 25–29.9, ≥30.0 kg/m²). In each BMI, collective subtypes of surgery (TLH, LASH) as well as hysterectomies as a whole were analysed. Demographic data and surgical parameters were evaluated.

Results

In all BMI subgroups, there were no significant differences concerning demographic parameters. Number of trocar site incisions needed was significantly less in women undergoing 3D compared to 2D laparoscopy independent of BMI. Furthermore, a significantly lower blood loss was revealed using 3D visualisation in LASH subgroups of the normal and overweight collectives. Three-dimensional laparoscopy was additionally associated with a significantly shorter duration of surgery in the TLH subgroup in overweight patients and a lower haemoglobin drop in the LASH subgroup of the obese.

Conclusion

The need of less trocar site incisions concerning all weight groups as well.

     

Sarcomas and the conservative management of uterine fibroids: a cause for concern?

The introduction of conservative management options has further increased the choices available to clinicians treating women with symptomatic uterine fibroids. However, in the absence of a tissue diagnosis, the possibility of mismanaging an underlying uterine sarcoma is still present, placing these patients at potential risk of a delayed diagnosis of this serious pathology. Evidence suggests that 1 in 250-400 women presenting with what are thought to be symptomatic fibroids, will in fact have an underlying sarcoma, making this an important clinical issue. This paper therefore reviews the methods currently available for the assessment of women in whom conservative management of symptomatic fibroids is contemplated.     

Cassandra’s prophecy and the trend of delaying childbearing: is there a simple answer to this complex problem?

There is a trend to later childbearing, but is the solution offered by Jane Everywoman appropriate or proportionate? Her case is, as she says herself, not necessarily representative and in describing it in such painful detail, might she alarm many women unnecessarily?     

Adrenal tissue in the placenta: a heterotopia caused by migration and embolism?

Heterotopic adrenal tissue is not uncommon, especially in the urogenital system. Adrenocortical tissue in the placenta, however, is presumably very rare. To our knowledge, four cases have been published. There are several different theories to explain such a heterotopia. According to our findings, an embolic spread of adrenal precursor cells via fetal vascular shortcuts is the most likely mechanism. Apart from that hypothesis, the possibility of a monodermal teratoma as well as of an aberrant differentiation of cells of the extraembryonic mesoderm are considered in the literature.     

Gonadotropins and the uterus: is there a gonad-independent pathway?

In the gonads, LH and hCG act via the same receptor to stimulate the production of progesterone in the luteal phase of the menstrual cycle and in early pregnancy. There are numerous reports that these two hormones can have direct actions on the uterus in addition to their indirect actions via stimulation of ovarian steroid hormones. However, unlike the situation in the gonads, various uterine tissues have been shown to respond to the related hormones FSH and TSH or the alpha-subunit common to these hormones. These additional actions cannot be mediated by the gonadal LH/hCG receptor. There have also been a series of reports that the uterus contains LH/hCG receptors. Attempts to characterize the molecular structure of these receptors have been difficult; thus, the possibility of a variant receptor cannot be excluded. The possibility also exists of a nonhomologous receptor, which would explain the differences in ligand specificity in uterine tissues. I will review the evidence regarding gonadotropin action in nongonadal tissues, primarily the uterus. In addition, the data regarding receptors will be reviewed. Finally, the clinical areas informed by this information will be explored.     

Placental calcifications: a clue for the identification of high-risk fetuses in the low-risk pregnant population?

“What does it mean, Doctor?” and “Is it going to affect my baby in some way?”.