Genetic Disorders and the Fetus. Группа авторов

Чтение книги онлайн.

Читать онлайн книгу Genetic Disorders and the Fetus - Группа авторов страница 69

Genetic Disorders and the Fetus - Группа авторов

Скачать книгу

Details Comments Patient history Family history Recurrent spontaneous abortionsStillbirthsMonogenic disorder(s)Congenital malformations or syndromesChromosomal disordersEthnicityConsanguinityNeurodevelopmental delayMaternal history: Previous venous thromboembolismDiabetes mellitusChronic hypertensionThrombophiliaSystemic lupus erythematosusAutoimmune diseaseEpilepsySevere anemiaHeart diseaseTobacco, alcohol, drug or medication useObstetric history: Recurrent miscarriagesPrevious child with congenital malformation, syndrome or genetic disorderPrevious child with intrauterine growth restrictionPrevious gestational hypertension or preeclampsiaPrevious gestational diabetes mellitusPrevious placental abruptionPrevious fetal demiseCurrent pregnancy:Maternal agePaternal ageGestational age at stillbirthMedical conditions complicating pregnancyCholestasisPregnancy weight gain and body mass indexComplications of multifetal gestation, such as twin–twin transfusion syndrome, twin reversed arterial perfusion syndrome, and discordant growthPlacental abruptionAbdominal traumaPreterm labor or rupture of membranesGestational age at onset of prenatal careIntrauterine growth restrictionAbnormalities seen on an ultrasound imageInfections or chorioamnionitis Fetal autopsy If patient declines, external evaluation by a trained perinatal pathologist. Other options include photographs, X‐ray imaging, ultrasonography, magnetic resonance imaging, and sampling of tissues, such as blood or skin. Freeze tissue for future DNA study If macerated tissue, request permission for needle biopsy of liver for DNA study Provides important information in approximately 30% of cases Placental examination Includes evaluation for signs of viral or bacterial infection. Discuss available tests with pathologist Provides additional information in 30% of cases. Infection is more common in preterm stillbirth (19 vs. 2% at term) Fetal karyotype/microarray Amniocentesis before delivery provides the greatest yield. Umbilical cord proximal to placenta if amniocentesis declined Whole‐exome or whole‐genome sequencing/from frozen tissue or needle biopsy Abnormalities found in approximately 8% of cases Maternal evaluation at time of demise Fetal–maternal hemorrhage screen: Kleihauer–Betke test or flow cytometry for fetal cells in maternal circulationSyphilisLupus anticoagulantAnticardiolipin antibodiesβ2 glycoprotein antibodies Routine testing for inherited thrombophilias is not recommended. Consider in cases with a personal or family history of thromboembolic disease In selected cases Indirect Coombs If not performed previously in pregnancy Glucose screening (oral glucose tolerance test, hemoglobin A1C) In the large‐for‐gestational‐age baby Toxicology screen In cases of placental abruption or when drug use is suspected Source: Modified from American College of Obstetricians and Gynecologists, Society for Maternal‐Fetal Medicine.1010

Snapshot of the 16 pathogenic variants reported in the ACTG2 gene.

      Psychologic support is important for couples who have lost an offspring from any cause – a situation compounded by fetal or congenital abnormality.1024, 1025 The birth (or prenatal detection) of twins discordant for a chromosomal disorder is not rare, given the increased frequency of multiple pregnancy associated with advanced maternal age and the use of assisted reproductive techniques. Pregnancy reduction1026 (see Chapter 32), or the death of one twin, or delivery of both, evokes severely conflicting emotions that may well affect the mother's care for the surviving child.1027 Considerable psychologic skill must be marshaled by physicians if meaningful care and support are to be provided.1028

      Supporting telephone calls from doctor and staff, and encouragement to attend appointments every 6 weeks, or more frequently when appropriate, are often appreciated by patients. Review of the autopsy report and discussion with reiterative counseling should be expected of all physicians. Frequently, parents receive an autopsy report by mail without further opportunity for explanation and discussion. In one study, 27 percent failed to receive autopsy results.1029 Providing contact with support groups whose focus is the disorder in question is also valuable. In the United States, the vast majority of these groups have combined to form the Alliance of Genetic Support Groups, which acts as a central clearinghouse and referral center.

      Family matters

Скачать книгу