By Diaz James
Careful evaluate of the placenta can usually supply a lot perception into issues of being pregnant within the mom and fetus. The ideas of gross placental exam are usually not tricky, yet a scientific procedure is critical to be entire. colour Atlas of Gross Placental Pathology, moment variation is designed to help within the cautious and thorough gross exam of the placenta through supplying an illustrated handbook of exam that incorporates common adaptations, irregular findings, in addition to strange pathology.
"...this atlas encompasses a wealth of vital info for pathologists studying the placenta and gives magnificent illustrations. This atlas is very prompt for all these engaged in pathologic exam of the placenta."
Archives of Pathology & Laboratory Medicine
"The caliber of any atlas will depend on transparent and applicable illustrations and concise textual content in a layout that permits for fast identity of particular entities. This atlas has either. the standard of the illustrations is best rate."
American magazine of Surgical Pathology
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Extra resources for Color Atlas of Gross Placental Pathology
20. Most placentas will have a cord insertion in the center or slightly eccentric in the disk, the latter shown here. The surface vessels disperse from the cord in a relatively even circumferential manner. Even when the cord has been torn from the placenta, examination of the distribution of surface blood vessels usually reveals the site of insertion. 21. This cord inserts close, but not quite at the margin of the placenta. The vessels course in one direction away from the cord. Such a vascular distribution is found in 38% of placentas and is likely somewhat less effective in perfusing the fetus.
A minimum cord length of 32 cm is felt to be necessary for normal vaginal delivery. Undue traction on the cord can cause fetal distress, cord tearing with hemorrhage, and possibly placental separation. 17). Entanglement can lead to a functionally short cord. 15. The area of hemorrhage shows a clamp mark (arrow). It is unlikely this is a true rupture of the cord and is probably not the cause of fetal distress. The majority of cord hemorrhages are an artifact, associated with cord clamping. Ideally, microscopic sections are not taken from such areas.
However, on observing cases such as this with extensive reduction in the fetal surface vasculature and increased thickness, one must consider possible effects on fetal perfusion. 7). Circummargination is not believed to lead to clinical problems, but prematurity and chronic bleeding are associated with circumvallation. The origin of extrachorial placentation is unclear. Suggestions include abnormal implantation, secondary growth lines, marginal separation, and loss of amniotic ﬂuid pressure. Amnion Nodosum/Squamous Metaplasia Small nodules on the amniotic surface are either amnion nodosum or squamous metaplasia.