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placenta

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Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 12
Publisher: American Registry of Pathology
Published: 01 August 2022
DOI: 10.55418/9781933477220-03
ISBN-10: 1-933477-22-9
ISBN: 978-1-933477-22-0
... age; mean age 30 years Ovary V Complete hydatidiform mole; occasionally choriocarcinoma Reproductive age; strong increase of incidence with age Placenta, usually in the uterus VI Resembling type I or nonseminoma, components of type II; no seminoma Older age, usually >60 years Atypical...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 12
Publisher: American Registry of Pathology
Published: 01 August 2022
DOI: 10.55418/9781933477220-04
ISBN-10: 1-933477-22-9
ISBN: 978-1-933477-22-0
... tumor is a malignant germ cell neoplasm that differentiates to form structures of the embryonic yolk sac, allantois, and extraembryonic mesenchyme ( 457 , 458 ). One of its distinctive features is a recapitulation of the endodermal sinuses of the rat placenta, resulting in the synonym, endodermal...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 6
Publisher: American Registry of Pathology
Published: 01 August 2021
DOI: 10.55418/9781933477091-ch03
ISBN-10: 1-933477-09-1
ISBN: 978-1-933477-09-1
...UMBILICAL CORD Figure 3-1 UMBILICAL CORD Normal color, thickness, and insertion of the umbilical cord in a term placenta. UMBILICAL CORD Figure 3-2 UMBILICAL CORD Leftward coiling of the cord, with 2 coils per 10 cm. The pink color of the cord is due to autolysis. UMBILICAL CORD Figure 3-3...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 6
Publisher: American Registry of Pathology
Published: 01 August 2021
DOI: 10.55418/9781933477091-ch10
ISBN-10: 1-933477-09-1
ISBN: 978-1-933477-09-1
... 10-18 LASER INTERTWIN ANASTAMOTIC ABLATION A: Placenta of a MCDA twin delivered at 36 weeks. This patient underwent fetoscopic laser coagulation of placental anastomoses for TTTS stage II at 18 weeks. Upon delivery, the placenta consisted of two separate placental masses. Inspection of the edges...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 6
Publisher: American Registry of Pathology
Published: 01 August 2021
DOI: 10.55418/9781933477091-ch11
ISBN-10: 1-933477-09-1
ISBN: 978-1-933477-09-1
...NORMAL PLACENTA Figure 11-1-1 NORMAL PLACENTA Transabdominal image of a fetus in the second trimester demonstrating the normal appearance of the placenta lying underneath the more hypoechoic myometrium. PLACENTAL SONOLUCENCY Figure 11-1-2 PLACENTAL SONOLUCENCY Transabdominal scan showing...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 10
Publisher: American Registry of Pathology
Published: 01 January 2022
DOI: 10.55418/9781933477183-12
ISBN-10: 1-933477-18-0
ISBN: 978-1-933477-18-3
... ) and about 0.8 percent of all pregnancies ( 49 ). Etiology. Both preeclampsia and HELLP syndrome are associated with abnormal placentation in the first trimester. The hepatocyte injury in HELLP is caused by the release of FasL (CD95L), produced by villous trophoblastic cells from the stressed placenta...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 10
Publisher: American Registry of Pathology
Published: 01 January 2022
DOI: 10.55418/9781933477183-13
ISBN-10: 1-933477-18-0
ISBN: 978-1-933477-18-3
... is unclear ( 114 ). It is speculated that potentially hepatotoxic fatty acid metabolites produced by the fetus or placenta accumulate in the maternal circulation ( 113 ). Multiple gestation pregnancies have a higher risk of AFLP because of increased fetal production of fatty acid metabolites ( 114...
Book Chapter
Series: Atlases of Tumor and Non-Tumor Pathology, Series 5
Volume: 10
Publisher: American Registry of Pathology
Published: 01 January 2022
DOI: 10.55418/9781933477183-10
ISBN-10: 1-933477-18-0
ISBN: 978-1-933477-18-3
...-mediated hepatocyte injury. Maternal IgG antibodies are actively transported across the placenta to the fetus; in gestational alloimmunity, the pregnant woman is exposed to fetal antigens that are not recognized as “self,” resulting in sensitization and production of IgG antibodies. Most gestational...
Images
TERM <span class="search-highlight">PLACENTA</span>  Slab section of a term <span class="search-highlight">placenta</span> showing the geography.
Published: 01 August 2021
TERM PLACENTA Figure 1-26 TERM PLACENTA Slab section of a term placenta showing the geography. More
Images
TERM <span class="search-highlight">PLACENTA</span>  Full-thickness photomicrograph of a term <span class="search-highlight">placenta</span>. There is ...
Published: 01 August 2021
TERM PLACENTA Figure 1-30 TERM PLACENTA Full-thickness photomicrograph of a term placenta. There is an increase in intervillous space in the upper one third of the placenta under the chorionic place (CP) and much denser villi in the lower two thirds of the parenchyma. (BP = basal plate.) More
Images
TRIMMED <span class="search-highlight">PLACENTA</span>  A <span class="search-highlight">placenta</span> trimmed of its membranes and umbilical cord.
Published: 01 August 2021
TRIMMED PLACENTA Figure 2-4 TRIMMED PLACENTA A placenta trimmed of its membranes and umbilical cord. More
Images
<span class="search-highlight">PLACENTA</span> MEMBRANACEA  Complete (left) and partial (above) <span class="search-highlight">placenta</span> membrana...
Published: 01 August 2021
PLACENTA MEMBRANACEA Figure 5-3-1 PLACENTA MEMBRANACEA Complete (left) and partial (above) placenta membranacea. More
Images
<span class="search-highlight">PLACENTA</span> ACCRETA SPECTRUM (PAS)  A: Grossly disrupted <span class="search-highlight">placenta</span> from a pregn...
Published: 01 August 2021
PLACENTA ACCRETA SPECTRUM (PAS) Figure 9-10-2 PLACENTA ACCRETA SPECTRUM (PAS) A: Grossly disrupted placenta from a pregnancy complicated with clinically apparent PAS. The basal plate and parenchyma are disrupted. B: Placenta with missing lobule from a noninvasive PAS. More
Images
<span class="search-highlight">PLACENTA</span> PERCRETA  <span class="search-highlight">Placenta</span> percreta in a cesarean hysterectomy specimen. E...
Published: 01 August 2021
PLACENTA PERCRETA Figure 9-10-5 PLACENTA PERCRETA Placenta percreta in a cesarean hysterectomy specimen. Exposed placenta is seen in anterior lower uterine segment, confirmed as present intraoperatively. More
Images
INVASIVE <span class="search-highlight">PLACENTA</span> ACCRETA SPECTRUM (<span class="search-highlight">PLACENTA</span> PREVIA INCRETA)  Trichrome sta...
Published: 01 August 2021
INVASIVE PLACENTA ACCRETA SPECTRUM (PLACENTA PREVIA INCRETA) Figure 9-10-11 INVASIVE PLACENTA ACCRETA SPECTRUM (PLACENTA PREVIA INCRETA) Trichrome stain demonstrates scarred myometrium. More
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<span class="search-highlight">PLACENTA</span> AFTER REMOVAL OF THE MEMBRANES  A: A ridge is left on the <span class="search-highlight">placenta</span>...
Published: 01 August 2021
PLACENTA AFTER REMOVAL OF THE MEMBRANES Figure 10-6 PLACENTA AFTER REMOVAL OF THE MEMBRANES A: A ridge is left on the placenta (top left) that is indicative of the dichorionic part of the placenta (yellow arrow). Further down, the intertwin anastomoses are clearly visible, characteristic of a mon... More
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THICKENED <span class="search-highlight">PLACENTA</span>  Transabdominal scan of a <span class="search-highlight">placenta</span> measuring 7 cm in wid...
Published: 01 August 2021
THICKENED PLACENTA Figure 11-1-19 THICKENED PLACENTA Transabdominal scan of a placenta measuring 7 cm in width. This is considered thickened. In this case, the fetus had trisomy 21 and hydrops. More
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CIRCUMVALLATE <span class="search-highlight">PLACENTA</span>  Transabdominal image of an anterior <span class="search-highlight">placenta</span> demons...
Published: 01 August 2021
CIRCUMVALLATE PLACENTA Figure 11-1-21 CIRCUMVALLATE PLACENTA Transabdominal image of an anterior placenta demonstrating a placental shelf, a finding characteristically seen in circumvallate placenta. More
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TWIN <span class="search-highlight">PLACENTAS</span>  A: Fused DCDA <span class="search-highlight">placentas</span>.  B: The thick, opaque intertwin se...
Published: 01 August 2021
TWIN PLACENTAS Figure 10-1 TWIN PLACENTAS A: Fused DCDA placentas. B: The thick, opaque intertwin septum is firmly attached to the placenta. C: Monochorionic twin placenta with intertwin membrane attached. The membrane is thin and translucent. D: The amnion layers of a monochorionic intertwin ... More
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<span class="search-highlight">PLACENTA</span> ACCRETA SPECTRUM  Sonographic findings that may be seen in placent...
Published: 01 August 2021
PLACENTA ACCRETA SPECTRUM Figure 11-1-13 PLACENTA ACCRETA SPECTRUM Sonographic findings that may be seen in placenta accreta spectrum (PAS). A: Transvaginal ultrasound in the third trimester demonstrating a placenta previa with multiple irregular lacunae. These had swirling blood within the lacu... More