B8-013 Histology/Immunology of Pregnancy Flashcards
a benign form of gestational trophoblast disease
nonviable fertilized ovum implants and develops a placenta-derived tumor
hydatidiform mole
“snowstorm” on ultrasound
“clusters of grapes”
hydatidiform mole
is a complete or partial hydatidiform mole more likely to progress to cancer?
complete
usually results from duplication of the haploid genome of a single sperm
or
fertilization by 2 sperm occurring in an ovum that has lost maternal chromosomes
complete hydatidiform mole
most commonly enucleated egg + single sperm that duplicates its DNA
complete hydatidiform mole
usually results from fertilization of an apparently normal ovum by 2 sperm
partial hydatidiform mole
is a complete or partial hydatidiform mole associated with a uterus larger than normal for gestational age?
complete
is a complete or partial hydatidiform mole associated with extremely elevated hCG?
complete
[complete or partial mole]
46 XX or 46 XY
complete
[complete or partial mole]
69XXX, 69 XXY, 69 XYY
partial
[complete or partial mole]
2 sperm + 1 normal egg
partial
attachment of placenta over internal cervical os
placenta previa
presents with painless vaginal bleeding in third trimester
placenta previa
risk factors for abnormal positioning of the placenta [2]
prior endometrial damage
uterine scarring
edge of placenta is less than 2 cm from internal os
low lying placenta
edge of placenta is more than 2 cm from the internal os
normal
can a patient have a vaginal delivery with a placenta previa?
no
can a patient have a vaginal delivery with a low lying placenta?
yes typically
placenta attaches too strongly or invades too deeply into the wall of the uterus
invasive placenta
placenta attaches too strongly to the muscular layer of the uterine wall, but does not invade
placenta acreta