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Embryology

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https://www.readbyqxmd.com/read/28523346/a-case-of-double-common-bile-duct-in-a-deceased-donor-for-transplantation
#1
Hajime Imamura, Susumu Eguchi, A M James Shapiro, Tatsuya Kin
A double common bile duct is extremely rare among the anatomical variations in the biliary tract system. We report an incidentally encountered case of the double common bile duct and discuss the novel anatomical findings of the accessory common bile duct from the viewpoint of embryology. A unique point of our case is that the accessory common bile duct bifurcated at the level of the intrapancreatic bile duct. There is no similar case in the previous literature among type II double common bile duct in the viewpoint of anatomical findings of the accessory common bile duct...
May 18, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28521350/surgical-treatment-of-a-double-origin-posterior-inferior-cerebellar-artery-aneurysm-and-insights-from-embryology-case-report-and-literature-review
#2
Michael A Silva, Alfred P See, Mohammad A Aziz-Sultan, Nirav J Patel
BACKGROUND AND IMPORTANCE: Aneurysms affecting double origin (DO) posterior inferior cerebellar artery (PICA) variants are rare. Most reports describe endovascular occlusion of the affected branch to treat the aneurysm, but we describe a patient in which open surgical sacrifice of 1 branch resulted in insufficient perfusion. CLINICAL PRESENTATION: We report the only case of open surgical treatment of an aneurysm affecting a leg of a DOPICA. A 42-year-old woman presenting with the worst headache of her life was found to have a DOPICA aneurysm and initially treated by trapping the aneurysm...
June 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28504820/using-propensity-score-matching-to-evaluate-the-effect-of-complementary-medicine-on-clinical-and-embryologic-outcomes-of-in-vitro-fertilization
#3
Anat Porat-Katz, Talia Eldar-Geva, Arik Kahane, Ora Paltiel
OBJECTIVE: To evaluate associations between using complementary medical therapies (CMTs) and embryologic and clinical outcomes of in vitro fertilization (IVF). METHODS: The present prospective questionnaire-based cohort study enrolled women aged 18-44 years undergoing their first, second, or third IVF cycle using their own oocytes at a large IVF clinic in Israel between February 1, 2013, and July 31, 2015. Clinical and embryologic data were obtained from patient records and patients completed a self-administered questionnaire that included details of any CMTs used to treat infertility...
May 15, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28503544/update-on-foregut-molecular-embryology-and-role-of-regenerative-medicine-therapies
#4
REVIEW
Silvia Perin, Conor J McCann, Osvaldo Borrelli, Paolo De Coppi, Nikhil Thapar
Esophageal atresia (OA) represents one of the commonest and most severe developmental disorders of the foregut, the most proximal segment of the gastrointestinal (GI) tract (esophagus and stomach) in embryological terms. Of intrigue is the common origin from this foregut of two very diverse functional entities, the digestive and respiratory systems. OA appears to result from incomplete separation of the ventral and dorsal parts of the foregut during development, resulting in disruption of esophageal anatomy and frequent association with tracheo-oesophageal fistula...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28501368/contribution-of-immunology-to-implantation-failure-of-euploid-embryos
#5
REVIEW
Jason M Franasiak, Richard T Scott
Outcomes in assisted reproduction have seen marked improvement. With increased ability in the embryology laboratory to use extended embryo culture which in turn enables other selective techniques, such as trophectoderm biopsy and comprehensive chromosome screening, the chance of success per embryo transfer is increased. However, even the selection of a euploid blastocyst, which selects out many embryonic factors, does not yield successful implantation and ultimately delivery in all cases. Among the factors that affect implantation failure of apparently reproductively competent embryos, the immune system has been perhaps both the most plausible and the most debated...
May 10, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28499629/non-obstructive-reproductive-tract-anomalies-a-review-of-surgical-management
#6
REVIEW
Bethany Skinner, Elisabeth H Quint
Mullerian anomalies include a spectrum of anatomic variants of the genital tract arising from abnormal embryologic development, ranging from incomplete resorption of uterine septa to complete vaginal agenesis. Non-obstructive anomalies are often recognized later than obstructive anomalies, as women do not present with pain. However, non-obstructive anomalies frequently have a negative impact on sexual and reproductive health, and careful evaluation and management of these disorders is warranted. This review will focus on the surgical management of non-obstructive Mullerian anomalies...
May 9, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28494827/use-of-placental-umbilical-blood-sampling-for-neonatal-admission-blood-cultures-benefits-challenges-and-strategies-for-implementation
#7
Shannon P Moore, Desi M Newberry, Amy J Jnah
Placental blood remains an underused resource for early neonatal care despite ample evidence that placental blood provides the same clinical decision making information without the need for painful, invasive blood sampling procedures. Potential benefits of placental/umbilical blood sampling (PUBS) for neonatal admission labs include decreases in pain reactivity, rates of anemia, need for blood transfusions, use of vasopressors, and rates of intraventricular hemorrhage. Here, we present a unique case study of a critically ill infant with contradictory blood culture results from PUBS and direct infant sampling...
May 1, 2017: Neonatal Network: NN
https://www.readbyqxmd.com/read/28491051/hashimoto-s-thyroiditis-and-autoimmune-gastritis
#8
REVIEW
Miriam Cellini, Maria Giulia Santaguida, Camilla Virili, Silvia Capriello, Nunzia Brusca, Lucilla Gargano, Marco Centanni
The term "thyrogastric syndrome" defines the association between autoimmune thyroid disease and chronic autoimmune gastritis (CAG), and it was first described in the early 1960s. More recently, this association has been included in polyglandular autoimmune syndrome type IIIb, in which autoimmune thyroiditis represents the pivotal disorder. Hashimoto's thyroiditis (HT) is the most frequent autoimmune disease, and it has been reported to be associated with gastric disorders in 10-40% of patients while about 40% of patients with autoimmune gastritis also present HT...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28485258/chromosomal-aberrations-in-monozygotic-and-dizygotic-twins-versus-singletons-in-denmark-during-1968-2009
#9
Lone Kroeldrup, Lisbeth A Larsen, Christina Fagerberg, Jens M Hertz, Kaare Christensen
BACKGROUND: Hall (Embryologic development and monozygotic twinning. Acta Geneticae Medicae et Gemellologiae, Vol. 45, 1996, pp. 53-57) hypothesized that chromosomal aberrations can lead to monozygotic (MZ) twinning. However, twinning and chromosomal aberrations increase prenatal mortality and could reduce the prevalence of chromosomal aberrations in live-born twins. We compared prevalence proportion ratios (PPR) of chromosomal aberrations and trisomy 21 (T21) in live-born twins versus singletons born in Denmark during 1968-2009...
May 9, 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28480155/update-on-the-notochord-including-its-embryology-molecular-development-and-pathology-a-primer-for-the-clinician
#10
REVIEW
Tushar Ramesh, Sai V Nagula, Gabrielle G Tardieu, Erfanul Saker, Mohammadali Shoja, Marios Loukas, Rod J Oskouian, R Shane Tubbs
The notochord is a rod-like embryological structure, which plays a vital role in the development of the vertebrate. Though embryological, remnants of this structure have been observed in the nucleus pulposus of the intervertebral discs of normal adults. Pathologically, these remnants can give rise to slow-growing and recurrent notochord-derived tumors called chordomas. Using standard search engines, the literature was reviewed regarding the anatomy, embryology, molecular development, and pathology of the human notochord...
April 4, 2017: Curēus
https://www.readbyqxmd.com/read/28479716/primary-intraosseous-odontogenic-squamous-cell-carcinoma-of-the-mandible
#11
Paolo Cariati, Ana Belén Marin Fernandez, Miguel Perez de Perceval Tara, Jose Fernandez Solis, Ildefonso Martinez Lara
Primary intraosseous odontogenic squamous cell carcinoma (PIOSCC) is a rare tumor. The incidence is low, and approximately 200 cases are reported in literature. The etiology is associated with the malignant degeneration of embryological remains. Differential diagnosis includes alveolar carcinomas, jaw metastases from other locations, odontogenic tumors, and tumors of the maxillary sinus. However, the diagnosis could be delayed due to the absence of symptoms in early stages. Surgery represents the first choice treatment...
January 2017: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/28479032/taking-the-endochondral-route-to-craniomaxillofacial-bone-regeneration-a-logical-approach
#12
REVIEW
Elmer C Kruijt Spanjer, Gerhard K P Bittermann, Inge E M van Hooijdonk, Antoine J W P Rosenberg, Debby Gawlitta
The current golden standard for treatment of craniomaxillofacial critical size bone defects, autologous bone grafting, is associated with several disadvantages which have prompted an increased demand for alternatives. New solutions are emerging in the form of bone tissue engineering. This involves harvesting of multipotent mesenchymal stromal cells (MSCs), after which they can be differentiated towards the osteogenic lineage mimicking intramembranous bone formation. However, translating this approach from laboratory to clinic has met with limited success...
April 8, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28473682/bilateral-microtia-canal-atresia-and-aplasia-of-cochleovestibular-nerve
#13
A Asma, A R Roslenda, I Fadzilah, A Mazita, M B Marina, A Ab Aziz
A six-month-old baby with congenital patent ductus arteriosus (PDA), bilateral microtia and canal atresia was referred for hearing assessment. The audiology assessment revealed bilateral profound hearing loss, which is atypical for a case of pure canal atresia. Imaging was performed much earlier than usual and, as suspected, the patient also had bilateral severe inner ear anomaly. It is extremely rare for a person to have both external and inner ear anomaly because of the different embryological origin. The only suitable hearing rehabilitation option for this kind of patients is brainstem implant...
April 2017: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28468205/a-rare-concha-variation-coronal-cleft
#14
Serap Yucel, Hediye Pinar Gunbey, Emre Gunbey, Asli Tanrivermis Sayit, Kerim Aslan
Nasal turbinates are embryologically derived from a series of outgrowths from the foetal lateral nasal wall. These outgrowths form a series of ridges, referred to as "ethmoturbinals" and have several vital functions. Several different turbinate variations have been reported so far. The authors presented 3 patients of coronal clefted concha who were diagnosed with magnetic resonance imaging. Computed tomography scans and nasal endoscopic examinations are also performed subsequently. These patients are the first coronal clefted concha cases in the literature and also the first radiological study defining concha cleft...
May 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28463941/congenital-clavicular-pseudoarthosis-how-to-differentiate-it-from-the-more-common-clavicular-fractures
#15
James Stewart Chalfant, Thomas Ray Sanchez
Congenital pseudoarthrosis of the clavicle is a rare entity that can be confused for a traumatic injury. We present 4 cases of congenital clavicular pseudoarthrosis and discuss its imaging findings that can help differentiate it from the more common clavicular facture. We also reviewed its epidemiology, embryology, and management based on available and most recent literature.
May 1, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28463628/microcomputed-tomographic-morphometric-and-histopathologic-assessment-of-congenital-bone-malformations-in-two-neotropical-viperids
#16
Marcelo Pires Nogueira de Carvalho, Sávio Stefanini Sant'Anna, Kathleen Fernandes Grego, Ana Carolina Brandão de Campos Fonseca-Pinto, Carla Aparecida Batista Lorigados, Nicolle Gilda Teixeira Queiroz-Hazarbassanov, José Luiz Catão-Dias
Congenital malformations have been reported in all classes of vertebrates and may be a determinant of life span and survival. In reptiles, the incidence of congenital malformations can be associated with genetic and environmental causes, including pollution. The characterization of pathological processes involved in the development of congenital malformations of bone in snakes is rare in the literature, but is of great relevance in the field of reptile conservation and environmental health. We describe congenital bone lesions in 50 newborn jararaca (Bothrops jararaca) and 26 South American rattlesnakes (Crotalus durissus terrificus) born from wild-caught pregnant females in Southeastern Brazil...
May 2, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28463469/in-memoriam-thomas-h-shepard-m-d-pioneer-in-embryology-and-teratology
#17
Alan G Fantel, Janine E Polifka, Godfrey P Oakley
Dr. Thomas H. Shepard died on October 3, 2016 at the age of 93. He was a major figure in the fields of teratology, embryonic and fetal pathology, and pediatrics. He was beloved by his colleagues as he was by the many students and fellows whom he taught, mentored and befriended. His contributions to teratology are extraordinary and he is greatly missed.Birth Defects Research 109:533-534, 2017.© 2017 Wiley Periodicals, Inc.
May 1, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28459125/the-face-of-glut1-ds-patients-a-3d-craniofacial-morphometric-analysis
#18
Valentina Pucciarelli, Simona Bertoli, Marina Codari, Ramona De Amicis, Valentina De Giorgis, Alberto Battezzati, Pierangelo Veggiotti, Chiarella Sforza
Introduction - Glut1 deficiency syndrome (Glut1-DS) is a neurological and metabolic disorder caused by impaired transport of glucose across the blood brain barrier (BBB). Mutations on the SCL2A1 gene encoding the glucose transporter protein in the BBB cause the syndrome, which encompasses epilepsy, movement disorders and mental delay. Such variability of symptoms presents an obstacle to early diagnosis. The patients seem to share some craniofacial features, and identification and quantification of these could help in prompt diagnosis and clinical management...
April 29, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28457239/ebstein-anomaly
#19
REVIEW
Elizabeth D Sherwin, Dominic J Abrams
Ebstein anomaly is a rare form of congenital heart disease with a uniquely high prevalence of arrhythmias. The most prevalent arrhythmia mechanisms are intrinsic to the underlying embryologic defects and may manifest at any stage. Current electrophysiological and surgical strategies are well equipped to address these arrhythmia mechanisms, yet despite available technology and a robust understanding of the mechanisms, these cases remain challenging. Surgical techniques that render arrhythmia substrates unreachable mandate comprehensive presurgical electrophysiological assessment and potential ablation...
June 2017: Cardiac Electrophysiology Clinics
https://www.readbyqxmd.com/read/28455451/long-term-mir-29b-suppression-reduces-aneurysm-formation-in-a-marfan-mouse-model
#20
Homare Okamura, Fabian Emrich, Jeffrey Trojan, Peter Chiu, Alex R Dalal, Mamoru Arakawa, Tetsuya Sato, Kiril Penov, Tiffany Koyano, Albert Pedroza, Andrew J Connolly, Marlene Rabinovitch, Cristina Alvira, Michael P Fischbein
Aortic root aneurysm formation and subsequent dissection and/or rupture remain the leading cause of death in patients with Marfan syndrome. Our laboratory has reported that miR-29b participates in aortic root/ascending aorta extracellular matrix remodeling during early aneurysm formation in Fbn1(C1039G/+) Marfan mice. Herein, we sought to determine whether miR-29b suppression can reduce aneurysm formation long-term. Fbn1(C1039G/+) Marfan mice were treated with retro-orbital LNA-anti-miR-29b inhibitor or scrambled-control-miR before aneurysms develop either (1) a single dose prenatally (pregnant Fbn1(C1039G/+) mice at 14...
April 2017: Physiological Reports
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