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Embryology

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5081. Incomplete Currarino triad as an embryological variant. Case report and review of the literature. (Abstract)

Incomplete Currarino triad as an embryological variant. Case report and review of the literature. Currarino triad is a rare embryological complex of congenital caudal anomalies, including anorectal malformation, sacral osseous defect, and presacral mass, that results from abnormal separation of the neuroectoderm from the endoderm. The authors present an unusual case of a patient who had, in addition to the classic features of this syndrome, holocord syringomyelia, low conus medullaris (...) , and tethered cord demonstrated by magnetic resonance imaging. They also discuss the embryological significance of this clinical entity and briefly review the relevant literature.

2006 Journal of Neurosurgery

5082. Colonic triplication associated with anorectal malformation: case presentation of a rare embryological disorder. (Abstract)

Colonic triplication associated with anorectal malformation: case presentation of a rare embryological disorder. Tubular colonic triplication is an extremely rare hindgut malformation, with only 2 reports in the literature to date. The present authors describe the new and unusual case of a boy born with an imperforate anus, rectovesical fistula, and 3 distinct left colons. The bladder was divided by an incomplete septum. Prenatal ultrasound suggested colonic duplication. Surgical management

2006 Journal of Pediatric Surgery

5083. Embryology of the spine and associated congenital abnormalities. (Abstract)

Embryology of the spine and associated congenital abnormalities. The spine is a complex and vital structure. Its function includes not only structural support of the body as a whole, but it also serves as a conduit for safe passage of the neural elements while allowing proper interaction with the brain. Anatomically, a variety of tissue types are represented in the spine. Embryologically, a detailed cascade of events must occur to result in the proper formation of both the musculoskeletal (...) and neural elements of the spine. Alterations in these embryologic steps can result in one or more congenital abnormalities of the spine. Other body systems forming at the same time embryologically can be affected as well, resulting in associated defects in the cardiopulmonary system and the gastrointestinal and genitourinary tracts.This article is to serve as a review of the basic embryonic development of the spine. We will discuss the common congenital anomalies of the spine, including their clinical

2005 The Spine Journal

5084. Extraarticular variants of the long head of the biceps brachii: a reminder of embryology. (Abstract)

Extraarticular variants of the long head of the biceps brachii: a reminder of embryology. Developmental anomalies of the long head of the biceps tendon are rare and have been described in the literature mainly dealing with anatomy and embryology. Because most basic embryologic research on this topic was conducted before 1966, a literature search was performed from archived anatomy textbooks and manuscript references. These data were compared with the scarce case descriptions of developmental (...) anomalies of the long head of the biceps tendon. An additional case illustration from our own experience was provided. From the literature, it appears that during the embryologic phase of development, a staged migration of the long head of the biceps tendon occurs from a position between the fibrous capsule and synovial layer to an intraarticular position. Recent anatomic and arthroscopic case reports have shown that interruption of this migration can occur in any of these stages. Given the recent

2008 Journal of Shoulder and Elbow Surgery

5085. Embryologic outcome and secretome profile of implanted blastocysts obtained after coculture in human endometrial epithelial cells versus the sequential system. (Abstract)

Embryologic outcome and secretome profile of implanted blastocysts obtained after coculture in human endometrial epithelial cells versus the sequential system. To compare embryologic and clinical outcomes in terms of preimplantation development, implantation, pregnancy rates, and secretome profile of implanted blastocysts from the preimplantation genetic diagnosis program grown in sequential versus endometrial epithelial cell (EEC) coculture system.Retrospective clinical study and prospective

2008 Fertility and Sterility

5086. Revised guidelines for human embryology and andrology laboratories. (Abstract)

Revised guidelines for human embryology and andrology laboratories. These guidelines provide clinicians with specific guidance on laboratory procedures to ensure that their programs' practice reflects current recommendations.

2008 Fertility and Sterility

5087. Does the fimbria have an embryologic origin distinct from that of the rest of the fallopian tube? (Abstract)

Does the fimbria have an embryologic origin distinct from that of the rest of the fallopian tube? To propose a new theory describing the development of the fallopian tube fimbria.Case series report.Metropolitan tertiary care children's hospital.Two girls, aged 12 and 20 years, who presented with pelvic pain.Magnetic resonance imaging, laparoscopy with salpingectomy, and pathologic analysis.Description of a novel theory regarding the embryologic development of the fallopian tube and its

2008 Fertility and Sterility

5088. The methodological quality of clinical guidelines of the European Society of Human Reproduction and Embryology (ESHRE). (Full text)

The methodological quality of clinical guidelines of the European Society of Human Reproduction and Embryology (ESHRE). Clinical practice guidelines bridge the gap between the evidence from literature and clinical practice, and they may provide guidance in ethical, legal and societal dilemmas. To explore the potentials for future international guideline development within the field of human reproduction and embryology, we assessed the quality of existing guidelines produced by the European (...) Society of Human Reproduction and Embryology (ESHRE).We systematically searched for the ESHRE guidelines produced after 1996 in electronic databases and on the Internet. Subsequently, we assessed the methodological quality of these guidelines using the validated Appraisal of Guidelines for Research and Evaluation (AGREE) Instrument.The overall methodological quality of most of the 11 selected ESHRE guidelines was poor. Most of the guidelines scored <30% in the domains of 'stakeholder involvement

2008 Human Reproduction PubMed abstract

5089. Choanal Atresia: Embryologic Analysis and Evolution of Treatment, a 30-Year Experience. (Abstract)

Choanal Atresia: Embryologic Analysis and Evolution of Treatment, a 30-Year Experience. Choanal atresia (CA) is a congenital obstruction of the posterior nasal apertures. Multiple surgical techniques have been proposed to repair the atresia. The purpose of this study is to review the basic science and embryology of CA with emphasis on the senior author's extensive experience, and refinement of the treatment of CA. In addition, we will review the outcomes after surgical correction of pediatric

2008 Laryngoscope

5090. Sources for Comparative Studies of Placentation I. Embryological Collections. (Abstract)

Sources for Comparative Studies of Placentation I. Embryological Collections. A rich source of material for comparative studies of the placenta is the collections made by pioneers in the field such as H.W. Mossman, A.A.W. Hubrecht and J.P. Hill. This overview gives a brief description of collections known to be available and information on how each can be accessed. Included are some of the major series of human and animal embryos, such as the Boyd and Carnegie collections, as these also house

2007 Placenta

5091. Do we need a new classification for radical hysterectomy? Insights in surgical anatomy and local tumor spread from human embryology. (Abstract)

Do we need a new classification for radical hysterectomy? Insights in surgical anatomy and local tumor spread from human embryology. Current surgical treatment of cervical carcinoma is based on the assumption of undirected intra- and transcervical local tumor propagation and is executed by tailored excision of the paracervical tissues. We have recently demonstrated that cervical carcinoma spreads for extended phases during its malignant progression within the permissive compartment

2007 Gynecologic Oncology

5092. An embryological study of fetal development of the rectourethralis muscle--does it really exist? (Abstract)

An embryological study of fetal development of the rectourethralis muscle--does it really exist? The so-called rectourethralis muscle is widely described in the urological literature. However, its description is subject to variations concerning extent and morphology. Moreover, little is known about its fetal development, which would allow a better understanding of the adult anatomy. The aim of this study was to investigate the morphology, extent and development of the rectourethralis muscle

2005 Journal of Urology

5093. The anatomy and embryology of posterior urethral valves. (Abstract)

The anatomy and embryology of posterior urethral valves. We reviewed the literature to better elucidate the history behind our understanding of the anatomy, classification and embryology of posterior urethral valves.A directed MEDLINE literature review of the anatomy, classification and embryology of posterior urethral valves was performed. An effort was made to focus on the most frequently cited historical articles as well as those including detailed anatomical analyses of fetal specimens (...) . Also included was the analysis of a specimen obtained at our institution in a novel manner that to our knowledge has not been previously described in the literature with respect to the anatomy of posterior urethral valves.The precise origins regarding the anatomy and embryology of posterior urethral valves remain undefined. However, the literature is abundant in theories regarding the origin of posterior urethral valves, based primarily on small uncontrolled series or case reports

2006 Journal of Urology

5094. Gavin Rylands de Beer: how embryology foreshadowed the dilemmas of the genome. (Abstract)

Gavin Rylands de Beer: how embryology foreshadowed the dilemmas of the genome. Gavin de Beer is remembered, at best, as a shadowy figure among those who gradually built up our current view of evolution and the role of genetics. This view derives from the Modern Synthesis - the recognition that emerged in the 1930s that genetics can adequately explain Darwinian evolution and speciation through natural selection. I argue that de Beer's theories of embryology had a crucial role in the Modern

2006 Nature Reviews. Genetics

5095. Unusual association of congenital middle ear cholesteatoma and first branchial cleft anomaly: management and embryological concepts. (Abstract)

Unusual association of congenital middle ear cholesteatoma and first branchial cleft anomaly: management and embryological concepts. To report two cases of an undescribed association of first branchial cleft fistula and middle ear congenital cholesteatoma and to discuss management and embryological hypothesis.Retrospective study and review of the literatureBoth patients were young girls free of past medical or surgical history. Surgical removal of the first cleft anomaly found in the two cases (...) a fistula routing underneath the facial nerve. Both cholesteatomas were located in the hypotympanum, mesotympanum. In one case, an anatomical link between the two malformations was clearly identified with CT scan.The main embryological theories and classification are reviewed. A connection between Aimi's and Michaels' theories (congenital cholesteatoma) and Work classification might explain the reported clinical association.

2005 International Journal of Pediatric Otorhinolaryngology

5096. Ejaculatory duct obstruction caused by a right giant seminal vesicle with an ipsilateral upper urinary tract agenesia: an embryologic malformation. (Abstract)

Ejaculatory duct obstruction caused by a right giant seminal vesicle with an ipsilateral upper urinary tract agenesia: an embryologic malformation. To report our experience with TURED in infertile men with EDO associated with abnormal development of the mesonephric or Wolffian duct, causing a contemporary malformation of the ipsilateral upper urinary tract.Retrospective clinical study.Infertile men in an hospital environment.Seven patients affected by Zinner syndrome, from March to September

2007 Fertility and Sterility

5097. Human blastocyst morphological quality is significantly improved in embryos classified as fast on day 3 (>/=10 cells), bringing into question current embryological dogma. (Abstract)

Human blastocyst morphological quality is significantly improved in embryos classified as fast on day 3 (>/=10 cells), bringing into question current embryological dogma. To evaluate developmental potential of fast cleaving day 3 embryos.Retrospective analysis.Academic reproductive center.Three thousand five hundred twenty-nine embryos.Day 3 embryos were classified according to cell number: slow cleaving: or=10 cells

2007 Fertility and Sterility

5098. Experimental contributions to the study of the embryology of the vagina. (Full text)

Experimental contributions to the study of the embryology of the vagina. Acién's hypothesis, deduced from patients with malformations of the female genital tract, especially those with renal agenesis and ipsilateral blind hemivagina, affirms the embryology of the human vagina as deriving from the Wolffian ducts and the Müllerian tubercle and could explain the embryological origin of all the female genital malformations reported. In this study, we investigated the hypothesis in rats.Twenty-five (...) the human vagina embryology.

2006 Human Reproduction PubMed abstract

5099. The need for interaction between assisted reproduction technology and genetics: recommendations of the European Societies of Human Genetics and Human Reproduction and Embryology. (Abstract)

The need for interaction between assisted reproduction technology and genetics: recommendations of the European Societies of Human Genetics and Human Reproduction and Embryology. Infertility and reproductive genetic risk are both increasing in our societies because of lifestyle changes and possibly environmental factors. Owing to the magnitude of the problem, they have implications not only at the individual and family levels but also at the community level. This leads to an increasing demand (...) of Human Genetics (ESHG) and European Society of Human Reproduction and Embryology (ESHRE), have joined efforts to explore the issues at stake and to set up recommendations to maximize the benefit for the couples in need and for the community.

2006 Human Reproduction

5100. Frozen embryo transfers: implications of clinical and embryological factors on the pregnancy outcome. (Full text)

Frozen embryo transfers: implications of clinical and embryological factors on the pregnancy outcome. Frozen embryo transfers are characterized by impaired pregnancy outcome and increased incidence of pregnancy loss as compared with fresh IVF/ICSI embryo transfers. In this study, we performed a retrospective analysis of clinical and embryological factors that potentially influence the outcome of frozen embryo transfer.We reviewed the outcome of 1242 frozen embryo transfers with respect (...) rate after frozen embryo transfer was dependent on both the woman's age and the quality of embryos transferred, at the same time being unaffected by IVF/ICSI treatment. In addition, the increased woman's age at IVF/ICSI treatment was identified as the only parameter elevating the biochemical pregnancy rate, whereas the clinical abortion rate was found to be unrelated to the clinical or embryological parameters studied.

2006 Human Reproduction PubMed abstract

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