Risk of recurrence of H mole in future pregnancy Is:
**Core Concept**
The risk of recurrence of a hydatidiform mole (H mole) in a future pregnancy is influenced by the genetic makeup of the mole and the reproductive history of the woman. A H mole is a type of gestational trophoblastic disease (GTD) characterized by abnormal trophoblastic proliferation and invasion, often resulting from an abnormal fertilization event.
**Why the Correct Answer is Right**
The risk of recurrence is significantly higher in women who have had a complete H mole, which is typically diploid and androgenetic, resulting from the fertilization of an empty egg by a single sperm that has undergone disomy. In contrast, partial H moles are triploid and usually result from the fertilization of an egg by two sperm. Women with a history of complete H mole have a higher risk of recurrence, estimated to be around 10-20%, whereas those with partial H mole have a lower risk, around 1-5%. The risk of recurrence is also increased in women with a family history of GTD.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the risk of recurrence is not significantly influenced by the woman's age at the time of the initial pregnancy.
**Option B:** This option is incorrect because the risk of recurrence is not directly related to the woman's reproductive history, such as the number of previous pregnancies or abortions.
**Option C:** This option is incorrect because the risk of recurrence is not significantly influenced by the presence of a family history of cancer, such as breast cancer or ovarian cancer.
**Clinical Pearl / High-Yield Fact**
Women with a history of complete H mole should be counseled about the increased risk of recurrence and monitored closely during future pregnancies, with regular ultrasound and serum hCG monitoring. A high index of suspicion for GTD should be maintained, and prompt evaluation and treatment should be initiated if there is any suspicion of recurrence.
**Correct Answer:** C.