| 词条 | Body-stalk | |||||||
| 释义 |
| Name = Body-stalk | Latin = Pedunculus truncalis | Image = Gray27.png | Caption = Diagram showing the expansion of amnion and delimitation of the umbilical cord | Image2 = Gray21.png | Caption2 = Section through the embryo | System = }} The body-stalk, also known as the allantoic stalk,[1] is a band of mesoderm that connects the caudal end of the embryo to the chorion in development. With the formation of the caudal fold, the body-stalk assumes a ventral position; a diverticulum of the yolk-sac extends into the tail fold and is termed the hindgut. With continued development, the body-stalk is later replaced by the umbilical cord. Body stalk anomalies occur in approximately 1 in 15,000 births.[2] They are due to defects in the formation of cephalic, caudal, and lateral embryonic body folds,[3] that result in a reduced or absent umbilical cord.[4] Additional imagesReferences1. ^{{cite book|author=Arthur Robinson|title=Cunningham's Textbook of Anatomy|url=https://books.google.com/books?id=my9AAAAAYAAJ&pg=PA54|year=1913|publisher=William Wood|pages=54}} 2. ^{{cite book|author=Asim Kurjak|title=Donald School Textbook of Transvaginal Sonography|url=https://books.google.com/books?id=xYuIWZE1Se4C&pg=PA28|date=30 June 2013|publisher=JP Medical Ltd|isbn=978-93-5090-473-2|pages=28}} 3. ^{{cite book|author1=Diana W. Bianchi|author2=Timothy M. Crombleholme|author3=Mary E. D'Alton|title=Fetology: Diagnosis & Management of the Fetal Patient|url=https://books.google.com/books?id=53Csy-mr1bsC|date=1 January 2000|publisher=McGraw Hill Professional|isbn=978-0-8385-2570-8}} 4. ^{{cite journal |last1=Kocherla |first1=K |last2=Kumari |first2=V |last3=Kocherla |first3=PR |title=Prenatal diagnosis of body stalk complex: A rare entity and review of literature. |journal=The Indian Journal of Radiology & Imaging |date=January 2015 |volume=25 |issue=1 |pages=67–70 |doi=10.4103/0971-3026.150162 |pmid=25709170|pmc=4329692 }} External links
1 : Embryology |
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