Hydatidiform – mole Is characterized histologically
**Core Concept**
Hydatidiform mole is a type of gestational trophoblastic disease characterized by abnormal proliferation of trophoblastic cells and abnormal development of the placenta. It is typically associated with a non-viable pregnancy.
**Why the Correct Answer is Right**
The correct answer is related to the histological features of hydatidiform mole. A hydatidiform mole is characterized by the presence of hydropic villi, which are swollen and distended villi filled with clear fluid. This is due to the abnormal proliferation of trophoblastic cells and the failure of the villi to develop properly. The histological appearance of a hydatidiform mole is often described as a "bubbly" or "grape-like" appearance due to the presence of these hydropic villi.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the histological features of a hydatidiform mole are distinct from those of a normal placenta. A normal placenta is characterized by the presence of mature villi, not hydropic villi.
* **Option B:** This option is incorrect because a choriocarcinoma is a type of gestational trophoblastic neoplasia that is characterized by the presence of malignant trophoblastic cells, not hydropic villi.
* **Option C:** This option is incorrect because a complete hydatidiform mole is a type of hydatidiform mole that is characterized by the presence of 46XX chromosomes, but this option does not describe the histological features of the mole.
**Clinical Pearl / High-Yield Fact**
A key clinical feature of a hydatidiform mole is the presence of vaginal bleeding in the first trimester, often accompanied by a palpable uterus. This is in contrast to a normal pregnancy, where vaginal bleeding is rare in the first trimester.
**Correct Answer:** C. Complete mole is characterized by the presence of 46XX chromosomes and the characteristic "bubbly" or "grape-like" appearance of the villi on histological examination.