Notes in 13 Placenta

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Published	05/01/2023	Obstetrical Imaging: PlacentaThe placenta is formed by the fetal {{c1::chorion}} and maternal {{c2::decidualized endometrium}}
Published	05/01/2023	Obstetrical Imaging: PlacentaThe mature placental circulation allows exchange of oxygen and nutrients between maternal and fetal vessels through {{c1:…
Published	05/01/2023	Obstetrical Imaging: PlacentaPlacental {{c1::location}} should be assessed in every patient, starting in the {{c2::2nd}} trimester
Published	05/01/2023	Obstetrical Imaging: PlacentaA {{c1::succenturiate lobe}} is an island of placental tissue separate from the main placenta, connected by blood vessels
Published	05/01/2023	Obstetrical Imaging: PlacentaPatients with succenturiate placental lobe have an increased incidence of {{c1::velamentous}} cord insertion and {{c2::re…
Published	05/01/2023	Obstetrical Imaging: PlacentaIf there is uncertainty about placental relationship with regard to the cervix, {{c1::transvaginal}} evaluation should be…
Published	05/01/2023	Obstetrical Imaging: PlacentaNormal placental position is >{{c1::2}} cm from the internal os
Published	05/01/2023	Obstetrical Imaging: Placenta{{c1::Low-lying}} placenta is ≤ 2 cm from the internal os
Published	05/01/2023	Obstetrical Imaging: PlacentaThe majority of low-lying placentas will resolve by the {{c1::3rd}} trimester due to placental migration
Published	05/01/2023	Obstetrical Imaging: PlacentaIn {{c1::placenta previa}}, the placenta covers the {{c2::internal cervical os}}
Published	05/01/2023	Obstetrical Imaging: PlacentaPlacenta previa classically presents with {{c1::painless}} vaginal bleeding in the {{c2::2nd}} trimester
Published	05/01/2023	Obstetrical Imaging: PlacentaFor safe delivery, patients with placenta previa require {{c1::Caesarean section}}
Published	05/01/2023	Obstetrical Imaging: PlacentaOver-diagnosis of placenta previa in the 2nd trimester may occur due to uterine {{c1::contractions}} or overfilling of th…
Published	05/01/2023	Obstetrical Imaging: Placenta{{c1::Placental abruption}} is the premature {{c2::separation}} of the placenta from its uterine attachment
Published	05/01/2023	Obstetrical Imaging: PlacentaPatients with placental abruption often present with {{c1::pain}} and on exam, {{c2::blood}} may be present in the v…
Published	05/01/2023	Obstetrical Imaging: PlacentaThere is increased incidence of placental abruption in maternal {{c1::hypertension}}, {{c2::drug}} abuse, {{c3::trau…
Published	05/01/2023	Obstetrical Imaging: PlacentaPlacental abruption can have variable ultrasound findings, thus a negative ultrasound cannot {{c1::exclude abruption}}
Published	05/01/2023	Obstetrical Imaging: PlacentaWhen visible, ultrasound of placental abruption shows a {{c1::hematoma}}, most commonly {{c2::subchorionic::location}}, b…
Published	05/01/2023	Obstetrical Imaging: PlacentaAcute placental abruption may be diagnostically challenging on ultrasound, as the hematoma may be {{c1::isoechoic}} …
Published	05/01/2023	Obstetrical Imaging: PlacentaYellow arrows: interface of placenta and {{c1::hematoma}}Diagnosis: {{c2::placental abruption}}
Published	05/01/2023	Obstetrical Imaging: PlacentaYellow arrows: heterogeneous, hypoechoic {{c1::preplacental hematoma}}, lacking {{c3::Doppler flow}}Diagnosis: {{c2::chro…
Published	05/01/2023	Obstetrical Imaging: PlacentaChronic placental abruption features {{c1::hypo}}echoic blood products within or around the placenta
Published	05/01/2023	Obstetrical Imaging: Placenta{{c1::Placenta accreta spectrum}} is abnormally tenacious or deep attachment of the placenta into the myometrium, ca…
Published	05/01/2023	Obstetrical Imaging: PlacentaPlacenta accreta is thought to be caused by uterine {{c1::scarring}} and resultant endometrial {{c1::deficiency}}
Published	05/01/2023	Obstetrical Imaging: PlacentaWith an anterior placenta and history of prior C-section, it is especially important to consider {{c1::placenta accreta}}
Published	05/01/2023	Obstetrical Imaging: PlacentaOther than uterine scarring, conditions that may predispose patients to placenta accreta include placenta {{c1::previa}},…
Published	05/01/2023	Obstetrical Imaging: PlacentaUltrasound findings of placenta accreta include prominent irregular {{c1::vascular lacunar spaces}} within the place…
Published	05/01/2023	Obstetrical Imaging: PlacentaThe presence of a "{{c1::moth-eaten}}" placenta with vascular lacunar spaces near the {{c2::bladder}} is highly specific …
Published	05/01/2023	Obstetrical Imaging: Placenta{{c1::Placenta accreta}} is an umbrella term that describes three degrees of placental attachment/invasion, and it a…
Published	05/01/2023	Obstetrical Imaging: PlacentaIn placenta {{c1::accreta}}, the placenta {{c2::attaches to}} the myometrium
Published	05/01/2023	Obstetrical Imaging: PlacentaIn placenta {{c1::increta}}, the placenta {{c2::invades into}} the myometrium
Published	05/01/2023	Obstetrical Imaging: PlacentaIn placenta {{c1::percreta}}, the placenta {{c2::penetrates through}} the myometrium
Published	05/01/2023	Obstetrical Imaging: PlacentaYellow arrows: cystic spaces in the inferior placenta, abutting the bladder, consistent with {{c2::vascular lacunae}}Red …
Published	05/01/2023	Obstetrical Imaging: PlacentaIn placenta percreta, a {{c1::focal bulge}} in the uterine wall is seen
Published	05/01/2023	Obstetrical Imaging: Placenta{{c1::Chorioangioma}} is the most common benign tumor of the placenta
Published	05/01/2023	Obstetrical Imaging: PlacentaChorioangioma is associated with fetal {{c1::hydrops}}, congenital {{c2::abnormalities}}, {{c3::hemolytic}} anemia, {{c4:…
Published	05/01/2023	Obstetrical Imaging: PlacentaOn ultrasound, chorioangioma appears as a {{c1::hypo}}echoic, rounded mass in the placenta with {{c2::an}}echoic {{c2::cy…
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