4. Concerning gestational trophoblastic disease, which of the following is (are) true?
(X-type question - select all correct answers)
A) A partial hydatidiform mole classically has normal areas of placenta intermixed with edematous villi.
B) A partial mole arises when an inactive oocyte is fertilized by a 23 X sperm with chromosomal duplication.
C) The classic ultrasound appearance of a complete hydatidiform mole in the second trimester is an enlarged uterus with a heterogenous echo pattern and multiple irregular fluid collections.
D) Bilateral corpus luteal cysts are found in 20 to 50 of complete moles.
E) Bilateral thecal luteal cysts are found in 20 to 50 of complete moles.
