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Biomedical subjects

J C Monnier

Publications and source records attributed to J C Monnier.

At least 73 records · Page 4Linked to original sources

[Cytokines and pregnancy: physiology].

Several biological systems originating in the fetus and in the mother are involved in embryo implantation, maintenance of the pregnancy, protection of the fetus against outside influences and the start of labour (these are the immune system, endocrine system, and the endothelial system). In order to work efficiently there has to be some co-ordination. Cytokines which were first described by immunologists make it possible for information between the systems to be exchanged. The authors, referring to recent publications, show that there are several cytokines with specific receptors at the feto-placental interface. The place and the physiological role of these molecules in co-ordinating the links are discussed. These cytokines can be involved in many pathological situations.

Colony-Stimulating Factors↗

[Turner's syndrome and pregnancy in donor oocytes and in vitro fertilization. Three case reports].

It is extremely rare for pregnancy to occur spontaneously in a woman with a mosaic or non-mosaic karyotype 45 x 0. (Till now only 13 patients with a homogeneous x 0 karyotype have been reported out of 62 patients who between them have had 138 pregnancies). Furthermore these pregnancies have been plagued by a number of important complications or fetal malformations (21% have had chromosome anomalies). It is therefore clear that in vitro fertilization with donor oocytes is a tempting solution for these women. The authors having three personal cases try and point out the conditions under which this technique can be used. It is important to realise that from the age of 10 or 12 years these patients have to have hormone treatment in order to avoid hypoplasia and hypovascularization of the uterus. Those conditions explain why so many these women had premature labours and also suffer from pre-eclampsia. Caesarean section was often found to be necessary because of feto-pelvic disproportion.

Adult↗

[Outcome of pregnancies obtained by fertilization in vitro. Experience at the V. Olivier Ward (department of Professor Monnier, Lille University Hospital Center) and review of the literature].

The outcome of 87 pregnancies obtained by fertilisation in vitro and progressing beyond 20 weeks of amenorrhea monitored in the Victor-Olivier Ward (Prof. Monnier, Lille Teaching Hospital Group) was analysed. Results were compared with those in the literature. The group was characterised by three features: age, the number of primipara and above all the multiple pregnancy rate. One quarter of FIV pregnancies are multiple pregnancies and almost two newborn out of live are the result of multiple pregnancies. Almost 70 per cent of clinical pregnancies progressed beyond six months. Pregnancy pathology was represented by a marked worsening of the prematurity rate and by a slightly increased risk of fetal under-development. The cesarean section rate was very markedly increased. Sex ratio, and perinatal mortality, malformation and chromosomal aberration rates were similar to those for spontaneous pregnancies. Results are reassuring overall, the pathology being encountered in pregnancies of this type being only partially explained by age, the number of primipara and the multiple pregnancy rate. This pathology could possibly be explained by the underlying situation in which sterility occurred.

Abortion, Spontaneous↗

[Immunologic aspects of endometriosis].

Endometriosis is thought to result from implantation of endometrial tissue swept back into the pelvic cavity during menstruation, or from coelomic metaplasia of the peritoneum. Yet not all women with menstrual reflux develop endometriosis. The authors present and analyse the arguments in favour of immune system involvement in the physiopathology of this frequent disease. A knowledge of the antigens that have been recognized and of the operative mechanisms will probably make it possible to understand better the repercussions of endometriosis on fertility, to develop diagnostic methods less traumatic than those available at present and to modulate treatments and improve their effectiveness.

Antibody Formation↗

[Cerebral aneurysms and pregnancy: 4 cases].

Haemorrhagic cerebral accidents are the commonest neurosurgical diagnoses made in pregnancy. The state of pregnancy makes it more likely that an arterial or an arteriovenous aneurysm will rupture and this is the principal cause of most haemorrhages. They occur more often in primiparae in the third trimester of pregnancy. The clinical picture is classical. The conformation of the diagnosis is made by scanning and angiography. The main differential diagnosis is eclampsia. Neurosurgical treatment should be carried out immediately whenever possible in order to avoid the two great risks that follow, namely recurrence of haemorrhage and secondly ischaemia. As far as the obstetric side is concerned, Caesarean section would only be indicated if: the clinical state of the mother is severe with coma and brain stem damage when the child is viable, if there is symptomatic vascular malformation diagnosed at term, if there is haemorrhagic arteriovenous malformation which is highly liable to occur and cannot be operated on without risks for the child if viable, if, finally, the interval between the surgical treatment of the condition and labour is less than 8 days. In all other cases a vaginal delivery is preferable under epidural anaesthetic which should be given if medical induction is carried out, and where instrumental delivery is being carried out systematically, unless radical treatment is being performed. The prognosis which is, in spite of all steps that may be taken, poor, depends on the initial neurosurgical stage and the nature of the causes of lesion and the possibilities of treatment.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

[Hydrocephalus with cerebrospinal fluid shunts and pregnancy: 2 cases].

During pregnancy 50% of all cases with a ventriculo-peritoneal shunt malfunction. This is because of anatomo-physiological changes associated with the pregnant state, and shows itself as a rise in intracranial tension. There were no acute neurological complications at term; with the malfunction of the shunt distally, vaginal delivery is preferable. It is not necessary routinely to carry out instrumental delivery.

Adolescent↗

[Obstetrical anesthesia of patients with disseminated lupus erythematosus].

The anaesthetic management of pregnant women who suffered from systemic lupus erythematosus (SLE) was reviewed retrospectively. During the ten-year period studied, there were nineteen pregnancies in eighteen women (mean age 27 years) who had either SLE or an isolated lupus type anticoagulant (LAF). Four pregnancies were stopped before the third trimester, two spontaneously, and the other two because of the mother's condition. Of the fifteen remaining pregnancies, eight children were born with a weight less than 2,500 g. One child, birth weight 750 g, died after three days. None of the fourteen living children had neonatal lupus. Six epidural and twelve general anaesthetics were carried out for four abortions, nine Caesarian sections, and five deliveries. Epidural anaesthesia was often contraindicated by neurological and haemostatic complications of the SLE: recent meningitis, thrombocytopaenia, prolonged bleeding, anticoagulant therapy. In fact, management of SLE patients required extensive preanaesthetic clinical and paraclinical assessment, as all the systems may be involved in this condition; moreover, it may worsen during pregnancy (seven times in this series). The most frequent complications were cardiovascular, renal, and haematological. Possible intubation difficulties must also be looked for. A LAF was associated with a great number of venous thromboses. An isolated LAF does not contraindicate epidural anaesthesia, as long as there is no associated haemostatic defect, such as a thrombocytopaenia. Furthermore, the patient should not have had prolonged episodes of unexplained bleeding, or require anticoagulants. In the present series, epidural anaesthesia was contraindicated in three of the four patients with LAF. Finally, prevention of thromboembolism, postoperative infection and adrenal failure (in those patients with long-term steroid therapy) must be carried out.

Adult↗

[Severe fetomaternal anti-Duffy allo-immunization].

The authors report a case of severe post-transfusion anti-Duffy (Fya) allo-immunization which required a treatment of four intrauterine exchange transfusions. The child was born at 32 weeks of amenorrhoea and he benefited from an exchange perfusion at birth. The outcome was fully satisfactory. On the basis of this case, the authors present a review of immuno-haematology concerning the Duffy system. This system holds fourth rank, after the ABO, rhesus and Kell systems, on the clinical importance scale of group systems. It concerns two alleles, Fya and Fyb, located on the first chromosome. The anti-Duffy antibodies are IgG immune antibodies; they may be responsible for haemolytic accidents, sometimes lethal, during transfusions, and they are an occasional cause of haemolytic disease of the newborn. A review of the literature yielded only 25 cases of haemolytic disease of the newborn, thereby showing that this allo-immunization is very rare, and it demonstrated its potential danger. Finally, the authors present the therapeutic methods used to treat the haemolytic disease of the newborn caused by anti-Duffy antibodies. Plasmapheresis and intrauterine exchange perfusion have dramatically improved the prognosis of this disease.

Adult↗

[Gaucher's disease and pregnancy].

Gaucher's disease is rare in association with pregnancy (we have only found 53 cases of women with this disease who had at least one pregnancy since 1945). A review of literature on this subject and this one case confirms that it is unlikely that the disease will progress as far as the symptomatology is concerned and that there are unlikely to be obstetric or fetal complications. All the same there are certain complications that can occur as the haematological state is concerned (thrombocytopenia, coagulation defects such as bleeding, particularly post-partum from the genital organs). Mechanical difficulties may occur because of the greatly enlarged spleen. Pregnancy is not contra-indicated but it is a high risk pregnancy that has to watched very carefully with ultrasound and great attention to the obstetric and biological condition.

Adult↗

[Multiple-fetus pregnancies. I. Myths and reality].

Pregnancies with many fetuses (triplets and more) have at all times been found interesting and unusual. Their rare and spectacular characteristics have for long been considered as divine punishment for the sin of adultery or bestiality or on the other hand as a mark of fertility and a gift from God. The authors report several legends (the Porcelets, the Trazegnies, la Dame de Montigny...) as well as the celebrated cases of fraud. Since techniques have been developed for medical handling of assisted reproduction, multiple pregnancies have become much more frequent. There is no case of survival of all fetuses when there have been more than six born at a time.

Europe↗

[Multiple pregnancies. II. Epidemiology, clinical aspects].

It used to be rare for multiple pregnancies to occur but we have seen a spectacular rise in them in France between 1970 and 1986. Triplet deliveries increased threefold. The authors analyse a personal series of 23 pregnancies (19 triplets, 3 quadruplets and 1 quintuplet pregnancy). Sixteen of these 23 were medically induced. The main complications that have been observed were: threatened premature delivery in 86%, high blood pressure in 34.7%, anaemia in 50%, and urinary tract infections in 30.4%, 6.8% of the babies had congenital malformations. Reviewing the literature has made it possible to discern the epidemiological factors causing multi-fetal pregnancies: family history, high female fertility, maternal age, ethnic factors, hormonal contraception etc... At present it is medically assisted reproduction that is the big supplier of multi-fetal pregnancies in developed countries. We have reviews of several maternal as well as fetal complications: the ovarian hyperstimulation syndrome, extra-uterine pregnancy, hypertension, anaemia, spontaneous abortion, prematurity, intra-uterine growth retardation and malformations.

Adult↗

[Magnetic resonance imaging in the evaluation in utero of Siamese twins].

The authors report a case of twins conjoined at the umbilicus and diagnosed by ultrasound after 19 weeks of amenorrhoea in whom an assessment in utero was carried out using magnetic resonance imaging after the patient had been curarized. A review of the literature on this very difficult problem of conjoined twins has given us the possibility to assess the diagnostic measures as well as the prognosis of this pathology. In particular we point out the results that can be obtained using MRI in utero during the second and third trimesters of the pregnancy.

Abdomen↗

[Multiple pregnancies. III. Therapeutic, psychologic and social aspects].

The authors analyse a series of 23 multiple pregnancies (19 triplet pregnancies, 3 quadruplets and 1 quintuplet). The first objective is to fight prematurity. Over and above all use of drugs as tocolytics (beta-mimetic drugs and progesterone) should routinely be advised and as soon as there is any threat of premature labour hospitalisation is needed. Twenty one of the 23 patients had prophylactic cerclage (Shirodkar's stitch). In 77% of the cases respiratory distress in the newborn was avoided by using cortico-therapy. Vaginal delivery can be carried out under certain conditions in triplet pregnancies. If certain precautions are taken there does not seem to be any immediate difference in the post delivery period of these children if they are born vaginally or by caesarean. Perinatal mortality is raised (at 5.6% for triplets and 58.3% for quadruplets). The psychological implications of these pregnancies are important. Problems appear as soon as the diagnosis is made and continue for years afterwards. On the social level, help given by the social services are usually inadequate. If the couples belong to the National Association for Mutual Aid of Parents of Children of Multiple Births, a system of mutual support is available. We recommend that these pregnancies should be looked after by several disciplines. These consist not only of obstetricians, paediatricians, anaesthetists, those who resuscitate together, but also psychologists, dietitians, social workers, community workers and physiotherapists.

Clinical Protocols↗

[The fetal-maternal interface. Description of its elements from an immunologic perspective].

The authors describe the different elements that can change the immunological response at the feto-maternal interface having studied the increasingly large literature on the subject. They consider first the nature of the interface and how trophoblastic antigens occur and then they point out the type and the role played by the different numerous decidual cells that take part in recognising, activating and regulating the immune system there. This general review is justified because local immunological phenomena seem to be important for the survival and the development of the feto-placental unit. They are also for immuno-suppressant mechanisms and immuno-tropic mechanisms. These phenomena, however important they may be, make it necessary to recognise one or more embryonic or trophoblastic antigens acting on the maternal immunological system.

Female↗

Lateralization of headache: possible role of an upper cervical trigger point.

An ipsilateral upper neck trigger point was found in 21 of 24 patients with unilateral headache. During the prodromic period this trigger point was detected as a tender protrusion on neck palpation. In 18 out of 24 patients it was also found during the headache-free period. On standard roentgenogram, this protrusion seemed to be a laterally developed C2 spinous process. The EMG study showed latent trapezius hypertonicity on the side of the headache, even during the headache-free period. The association of the painful protrusion and trapezius hypertonicity could create an autoreinforcing nociceptive loop, which in turn could be the cause of lateralization of the pain.

Adult↗

[Thyroid cancer and pregnancy].

Thyroid cancer is very rare during pregnancy, but a thyroid nodule is more likely to be cancerous if discovered during pregnancy (43 p. cent versus 15 p. cent). The diagnosis is more difficult. Tests using radioactive substances are contraindicated during pregnancy. Ultrasonography does not permit to specify the nature of the nodule and aspiration biopsy with cytological examination becomes the examination of choice. One should not hesitate to operate on these nodules, during pregnancy, if the diagnosis is made. It is difficult to assert that the prognosis is aggravated by pregnancy since there are so few cases, but several authors report a few cases with an abnormally fast progression during pregnancy. Forms which are properly treated and occurred before the age of 40, are not a contraindication to subsequent pregnancies, if they are not anaplastic or metastatic forms. However, a reasonable delay of the surgery is advised in order to stabilize the hormonal treatment and the calcium-phosphorus balance.

Adult↗

[Bourneville's tuberous sclerosis. Prenatal diagnosis of a case].

The discovery of a tumour of the heart on fetal ultrasound is a rare event. 60% of heart tumours in the fetus are rhabdomyomas. 50% of rhabdomyomas are associated with Bourneville's tuberous sclerosis. The inherited element of the effect of the gene is variable but often severe (75% of patients die before the age of 25 and 60-80% are disabled). Tuberous sclerosis Bourneville is a multifocal pathological condition of which only the presence of rhabdomyomata in the heart make it possible to diagnose the condition antenatally. Monitoring the fetus consists of looking carefully for the complications that can occur and of planning the health care of the newborn including the need to consider surgical intervention at birth.

Female↗

[Non-specific immune defenses present in pregnancy].

The state of pregnancy changes the immune system by allowing the trophoblast to go on developing without letting the mother's body be invaded by it, and by keeping intact immune defences against the usual assaults. The non specific immune system is the first bulwark against invaders. The elements of this system, which do not depend on immunological memory, are: the macrophage-monocyte system, Natural Killer cells (NK), the complement component and other bactericidal substances such as lysozyme, fibronectin and interferon. Pregnancy improves the working of the monocyte-macrophage system. In fact, the macrophages of th reticulo-endothelial system, which can be found in different strategic places in the body, phagocytose abnormal particles more intensely. The monocytes in the circulation are more aggressive in pregnancy. They are drawn to the feto-placental interface where they are activated by different lymphokines and cytokines which can be found in quantity at this site. The role of these local active monocytes is not limited only to phagocytosis because among the hundred substances that they can elaborate are some that will regulate trophoblastic proliferation. The activity of the Natural Killer cells that are circulating and which can control tumour cell growth and cells infected by viruses is lowered in pregnancy. The serum taken from pregnant women seems to have a substance that counters the maturation of the Natural Killer cell lines. The complement system of protein synthesis, which normally acts to lyse bacteria in the chemotaxis during opsonisation, is raised in pregnancy. At the feto-placental interface it does seem to activate this system but not elsewhere in the general circulation. Interferon, which is a molecule that normally activates NK cells, has been found at the feto-placental site, without seeming to have a particular role. Pregnancy changes the quantity and the distribution of other elements in the non specific immune system such as transferrin , fibronectin and beta-lysin.

Female↗