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developmental embryology

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https://www.readbyqxmd.com/read/29217912/laparoscopic-transperitoneal-ureterouretrostomy-for-retrocaval-ureter-a-case-report
#1
J S Rajkumar, P V Dhanapal, Ilamparuthi Chennakrishnan, S Akbar, Anirudh Rajkumar, Prabakaran R, G Venkatesan, Deepa Ganesh
Retrocaval ureter is a rare developmental anomaly with an incidence of 1 in 1500 births. The inferior vena cava compresses the ureter posteriorly, causing upstream dilatation of the proximal ureter and the kidney. We report a 16-year-old girl who presented with right flank pain, diagnosed as retrocaval ureter with ultrasound, intravenous urogram and CECT, and was treated with laparoscopic transperitoneal ureteroureterostomy. Embryological aspects and laparoscopic technical considerations are highlighted in this case report...
December 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/29209884/congenital-obstruction-of-foramen-of-monro-report-of-10-patients-and-literature-review
#2
Shima Shahjouei, Zohreh Habibi, Soheil Naderi, Ramin Mahmoodi, Farideh Nejat
INTRODUCTION: A wide spectrum of etiologies can obstruct foramen of Monro (FOM) and result in hydrocephalus. Congenital occlusion of FOM is a rare entity which may present either in childhood or in adulthood. METHODS: Between 2007 and 2016, we screened all pediatric patients with hydrocephalus of either one or both lateral ventricles. Congenital occlusion of FOM was confirmed in the absence of masses occupying the FOM, prenatal or postnatal central nervous system (CNS) infections, intraventricular hemorrhage, previous cerebral intervention, or associated CNS anomalies affecting the flow of cerebrospinal fluid (CSF)...
December 5, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29138998/crafting-socialist-embryology-dialectics-aquaculture-and-the-diverging-discipline-in-maoist-china-1950-1965
#3
Lijing Jiang
In the 1950s, embryology in socialist China underwent a series of changes that adjusted the disciplinary apparatus to suit socialism and the national goal of self-reliance. As the Communist state called on scientists to learn from the Soviets, embryologists' comprehensive view on heredity, which did not contradict Trofim Lysenko (1898-1976)'s doctrines, provided a space for them to advance their discipline. Leading scientists, often trained abroad in the tradition of experimental embryology, rode on the tides of Maoist ideology and repositioned their research...
November 7, 2017: History and Philosophy of the Life Sciences
https://www.readbyqxmd.com/read/29101997/assessment-of-embryo-morphology-and-developmental-dynamics-by-time-lapse-microscopy-is-there-a-relation-to-implantation-and-ploidy
#4
REVIEW
Nikica Zaninovic, Mohamad Irani, Marcos Meseguer
Time-lapse microscopy (TLM) is an exciting novel technology with great potential for enhancing embryo selection in the embryology laboratory. This non-invasive objective assessment of embryos has provided a new tool for predicting embryo development and implantation potential. TLM detects several morphological phenomena that are often missed with static observations using conventional incubators, such as irregular divisions, blastocyst collapse and re-expansion, timing of blastocoel appearance, and timing of formation and internalization of fragments...
November 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/29063150/drug-safety-in-pregnancy-the-german-embryotox-institute
#5
Katarina Dathe, Christof Schaefer
Since 1988, the German Embryotox institute combines individual counselling of pregnant women and their health care providers (HCP) with research on drug safety in pregnancy. In addition, Embryotox offers web-based information which covers the most important and most frequently requested pharmaceutical substances. In contrast to ready-made drug risk information in package leaflets and other product information, individual counselling considers different clinical settings such as (1) looking for a drug of choice or planning pregnancy under medication, (2) risk assessment of a particular drug that has already been taken during an (unplanned) pregnancy and (3) evaluation of an adverse pregnancy outcome in association with a particular medication...
October 24, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29057569/the-development-of-a-core-syllabus-for-the-teaching-of-oral-anatomy-histology-and-embryology-to-dental-students-via-an-international-delphi-panel
#6
Bernard John Moxham, Stephen McHanwell, Barry Berkovitz
The formulation of core syllabuses for the biomedical sciences within medical and dental courses is partially driven by the need to cope with decreased time allocations for these subjects as a result of major curricular changes taking place worldwide. There is also a requirement to deal with the request for increased clinical relevance. In response to such demands, the International Federation of Associations of Anatomists (IFAA) is devising core syllabuses for the anatomical sciences relating to the education and training of both scientific and clinical professions...
October 23, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/29040332/the-developmental-programme-for-genesis-of-the-entire-kidney-is-recapitulated-in-wilms-tumour
#7
Ryuji Fukuzawa, Matthew R Anaka, Ian M Morison, Anthony E Reeve
Wilms tumour (WT) is an embryonal tumour that recapitulates kidney development. The normal kidney is formed from two distinct embryological origins: the metanephric mesenchyme (MM) and the ureteric bud (UB). It is generally accepted that WT arises from precursor cells in the MM; however whether UB-equivalent structures participate in tumorigenesis is uncertain. To address the question of the involvement of UB, we assessed 55 Wilms tumours for the molecular features of MM and UB using gene expression profiling, immunohistochemsitry and immunofluorescence...
2017: PloS One
https://www.readbyqxmd.com/read/29028511/a-pictorial-review-of-diagnostic-pitfalls-of-developmental-anomalies-and-variants-in-pancreatic-imaging
#8
REVIEW
Jong Eun Lee, Sang Soo Shin, Shin Jung Kim, Suk Hee Heo, Hyo Soon Lim, Jin Woong Kim, Yong Yeon Jeong
Developmental anomalies and anatomic variants of the pancreas vary widely, and most of them are encountered incidentally during radiologic evaluation. However, some of these anomalies and variants are potentially pathologic and may cause various clinical presentations in childhood or adulthood. The early identification of these entities in various imaging modalities including ultrasound, computed tomography (CT), and magnetic resonance (MR) imaging would be valuable in making correct diagnoses and, in turn, preventing unnecessary additional procedures...
September 19, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/29018484/infrapatellar-fat-pad-stem-cells-from-developmental-biology-to-cell-therapy
#9
REVIEW
Ronaldo J F C do Amaral, Henrique V Almeida, Daniel J Kelly, Fergal J O'Brien, Cathal J Kearney
The ideal cell type to be used for cartilage therapy should possess a proven chondrogenic capacity, not cause donor-site morbidity, and should be readily expandable in culture without losing their phenotype. There are several cell sources being investigated to promote cartilage regeneration: mature articular chondrocytes, chondrocyte progenitors, and various stem cells. Most recently, stem cells isolated from joint tissue, such as chondrogenic stem/progenitors from cartilage itself, synovial fluid, synovial membrane, and infrapatellar fat pad (IFP) have gained great attention due to their increased chondrogenic capacity over the bone marrow and subcutaneous adipose-derived stem cells...
2017: Stem Cells International
https://www.readbyqxmd.com/read/29017464/respective-contribution-of-the-cephalic-neural-crest-and-mesoderm-to-six1-expressing-head-territories-in-the-avian-embryo
#10
Barbara F Fonseca, Gérard Couly, Elisabeth Dupin
BACKGROUND: Vertebrate head development depends on a series of interactions between many cell populations of distinct embryological origins. Cranial mesenchymal tissues have a dual embryonic source: - the neural crest (NC), which generates most of craniofacial skeleton, dermis, pericytes, fat cells, and tenocytes; and - the mesoderm, which yields muscles, blood vessel endothelia and some posterior cranial bones. The molecular players that orchestrate co-development of cephalic NC and mesodermal cells to properly construct the head of vertebrates remain poorly understood...
October 10, 2017: BMC Developmental Biology
https://www.readbyqxmd.com/read/28987788/biomechanics-and-developmental-potential-of-oocytes-and-embryos
#11
REVIEW
Jonathan Kort, Barry Behr
The high incidence of multiple embryo transfers is evidence of the need for better methods of embryo selection. Additionally, methods to determine the reproductive competence of unfertilized oocytes are critically needed to inform the growing population of patients undergoing fertility preservation. The ideal method of oocyte and embryo selection would be noninvasive, inexpensive, and able to be incorporated into embryology workflow with minimal disruption. Methods to assess the biomechanical properties of cells offer many of these traits, and there is a growing body of evidence in multiple cell types demonstrating the biomechanical properties of cells are reflective of a cell's intrinsic health...
November 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28966305/functional-vascular-anatomy-of-the-brain
#12
Michihiro Tanaka
Functional vascular anatomy is the study of anatomy in its relation to the function that figures out the normal and pathological vascularization of the brain and spinal cord. The mechanism of anatomical variations (e.g. fenestration of the basilar artery, persistent primitive trigeminal artery, and aberrant subclavian artery) can be explained according to the embryological development of the cardiovascular system. The most developmental process is common among the species of the vertebrates from the fish to the mammalian in the early phase of embryo...
November 15, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28964675/the-congenital-undescended-scapula-syndrome-sprengel-and-the-cleithrum-a-case-series-and-hypothesis
#13
Rishi Dhir, Kuen Chin, Simon Lambert
BACKGROUND: Sprengel deformity is a rare congenital shoulder girdle anomaly characterized by scapula malposition, periscapular muscle atrophy, and limited shoulder movement. Traditionally, it has been managed by omovertebral bar excision and muscle transplantation procedures guided by age and Cavendish grade. We present a unique observation in humans: a case series with Sprengel deformity possessing a cleithrum, an ancestral remnant of shoulder girdle development found in archaic bony fish...
September 27, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28964656/-the-dorsoventral-inversion-an-attempt-of-synthesis
#14
REVIEW
S Louryan, N Vanmuylder
The invertebrates, with known exception of echinoderms, are hyponeurian and protostomian. By contrast, echinoderms, chordates and vertebrate are epineurian and deuterostomian. Convinced of the uniqueness origin of all species, Etienne Geoffroy Saint Hilaire (1772-1844), had postulated a complete inversion of body plan to explain this difference. He had to face up to the hostility of the fixist Georges Cuvier (1763-1832). Much later, famous embryologists such as Maurice Caullery still believed that this idea was erroneous...
September 27, 2017: Morphologie: Bulletin de L'Association des Anatomistes
https://www.readbyqxmd.com/read/28929000/successful-vaginal-delivery-of-naturally-conceived-dicavitary-twin-in-didelphys-uterus-a-rare-reported-case
#15
Houda Nasser Al Yaqoubi, Nishat Fatema
Didelphys uterus, or double uterus, is an embryological developmental malformation of the müllerian ducts with the incidence of approximately 8.3% of all müllerian duct abnormalities (MDAs). Didelphys uterus accompanying dicavitary twin gestation is encountered as a very rare entity with overall incidence of about 1 in 1,000,000. We report a rare case of didelphys uterus, diagnosed since her first pregnancy, and during her fourth pregnancy she conceived dicavitary twin naturally without any infertility treatment...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28885087/encephalocele-development-from-a-congenital-meningocele-case-report
#16
Gurpreet S Gandhoke, Ezequiel Goldschmidt, Robert Kellogg, Stephanie Greene
A fetal MRI study obtained at 21 weeks' gestation revealed a suboccipital meningocele without hydrocephalus. One day after term birth, MRI demonstrated an acquired cerebellar encephalocele, and MRI obtained 5 months later showed progressive enlargement of the encephalocele, still without obvious hydrocephalus. The patient underwent an operation in which an external ventricular drain was placed, the grossly normal cerebellum was reduced into the posterior fossa without resection, and the dural defect was closed...
November 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28851468/persistent-fifth-aortic-arch-the-great-pretender-in-clinical-practice
#17
David F A Lloyd, S Y Ho, Kuberan Pushparajah, Subhasis Chakraborty, Mohamed Nasser, Hideki Uemura, Rodney Franklin, Alan G Magee
Persistence of the embryonic "fifth aortic arch" in postnatal life is a rare, enigmatic - and at times controversial - condition, with variable anatomical forms and physiological consequences. First described in humans over 40 years ago by Van Praagh, the condition was labelled the "great pretender" by Gerlis 25 years later, because of its apparent propensity to mimic anatomically similar structures. Despite many subsequent case reports citing the condition, the true developmental origin of these structures remains unresolved, and has been the subject of debate among embryologists for more than a century...
August 30, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28818334/the-use-of-acupuncture-in-first-aid-of-burns-clinical-report
#18
A Loskotova, J Loskotova
Burns are a very painful skin injury, or injury of soft tissues. The development of post-traumatic stress disorder can develop, even in those with minor injuries (Ia-IIb degree). Development of problems is very rapid and intense since, according to developmental embryology, the skin and central nervous system (CNS) descend from the same germ layer-ectoderm. This clinical report presents the results acquired from the data of 1008 patients suffering from burns treated by the acupuncture (ACU)-from 1983-2015 in the surgery ward of the hospital in Vysoke Myto in the Czech Republic...
August 14, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28808898/wilhelm-his-and-mechanistic-approaches-to-development-at-the-time-of-entwicklungsmechanik
#19
Jean-Claude Dupont
At the end of the nineteenth century, approaches from experimental physiology made inroads into embryological research. A new generation of embryologists felt urged to study the mechanisms of organ formation. This new program, most prominently defended by Wilhelm Roux (1850-1924), was called Entwicklungsmechanik. Named variously as "causal embryology", "physiological embryology" or "developmental mechanics", it catalyzed the movement of embryology from a descriptive science to one exploring causal mechanisms...
August 14, 2017: History and Philosophy of the Life Sciences
https://www.readbyqxmd.com/read/28807504/bone-up-craniomandibular-development-and-hard-tissue-biomineralization-in-neonate-mice
#20
Khari D Thompson, Holly E Weiss-Bilka, Elizabeth B McGough, Matthew J Ravosa
The presence of regional variation in the osteogenic abilities of cranial bones underscores the fact that the mechanobiology of the mammalian skull is more complex than previously recognized. However, the relationship between patterns of cranial bone formation and biomineralization remains incompletely understood. In four strains of mice, micro-computed tomography was used to measure tissue mineral density during perinatal development in three skull regions (calvarium, basicranium, mandible) noted for variation in loading environment, embryological origin, and ossification mode...
January 29, 2017: Zoology: Analysis of Complex Systems, ZACS
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