For women, irregular vaginal bleeding outside of normal menstruation warrants prompt medical evaluation. Such bleeding often signals tumors or malignant trophoblastic disease.
What are the clinical manifestations of molar pregnancy?
Experts note that early symptoms resemble normal pregnancy, including amenorrhea, drowsiness, nausea, vomiting, and loss of appetite.After a period of time, the following symptoms may appear:
1. Vaginal bleeding after missed period
This is the most common symptom. Most patients experience irregular vaginal bleeding 2 to 4 months after a missed period. Recurrent heavy bleeding may occur, and the discharged blood may sometimes contain bubble-like tissue. Untreated cases can lead to anemia and secondary infections.
2. Abnormally enlarged and softened uterus
Due to hydatidiform mole edema and uterine cavity hemorrhage, approximately two-thirds of patients exhibit a uterus larger than the gestational age, with a soft texture. In a minority of cases, the uterus may correspond to or be smaller than the gestational age due to vesicular degeneration. When the uterus reaches the size of a 5-month pregnancy, no fetal body, fetal movements, or fetal heartbeat can be detected.
3. Abdominal Pain
Rapid hydatidiform mole proliferation causes abrupt uterine enlargement, triggering uterine contractions that produce paroxysmal lower abdominal pain. The pain is generally mild and tolerable.
4. Ovarian Lutein Cyst
Occurring in 30%–50% of cases, it is typically asymptomatic but may occasionally twist acutely, causing acute abdomen.After removal of the hydatidiform mole tissue, lutein cysts may resolve spontaneously within 2–4 months.
5. Hyperemesis Gravidarum and Preeclampsia Signs
Hyperemesis gravidarum often develops earlier in molar pregnancies and frequently progresses to hyperemesis. Hypertension, edema, and proteinuria may appear as early as mid-pregnancy, potentially leading to preeclampsia, especially in cases of rapid uterine enlargement.
6. Hyperthyroidism
Approximately 10% of patients develop mild hyperthyroidism, which resolves rapidly after hydatidiform mole resolution.
7. Anemia and Infection
Repeated massive bleeding causes anemia, while compromised immunity and bacterial ascending infection lead to infections.
8. Trophoblastic Pulmonary Embolism
Approximately 2% of hydatidiform mole patients experience acute respiratory distress after mole evacuation due to trophoblastic cell embolization of pulmonary vessels. Recovery typically occurs within 72 hours with treatment.
What are the risks of malignant hydatidiform mole?
Malignant trophoblastic neoplasia arises from the malignant transformation of embryonic trophoblastic cells.This category includes invasive mole, choriocarcinoma, and placental site trophoblastic tumors. Choriocarcinoma further comprises gestational and non-gestational types. Non-gestational choriocarcinoma is rare but may occur in the mediastinum, retroperitoneum, ovaries, lungs, esophagus, stomach, liver, pelvis, or abdominal cavity.The etiology of trophoblastic disease remains unclear, potentially linked to malnutrition (particularly insufficient high-quality animal protein intake), viral infections, ovarian dysfunction and egg abnormalities, chromosomal abnormalities, immune dysfunction, ethnicity, geography, climate, and environmental factors.
Characteristics of these tumors include: 1. Most are not difficult to diagnose, with the primary clinical symptom being irregular vaginal bleeding.2. The tumor cells secrete human chorionic gonadotropin (HCG), detectable in the patient's blood. However, HCG may be undetectable in rare cases, complicating clinical diagnosis. Additionally, HCG levels also rise during pregnancy. Therefore, definitive diagnosis requires multiple tests, including ultrasound and imaging studies.