What are the other Names for this Condition? (Also known as/Synonyms)

• Partial Hydatidiform Mole (PHM)
• Partial Molar Pregnancy
• PHM (Partial Hydatidiform Mole)

What is Partial Mole of Placenta? (Definition/Background Information)

• Partial Mole of Placenta is a growth or mass formation in the uterus occurring in the beginning of pregnancy. It occurs due to problems in fertilization, but the exact cause is currently not known. The condition is also known as Partial Molar Pregnancy
• Partial Mole of Placenta is an abnormally formed placenta and contains few fetal parts, as opposed to complete mole of placenta. The condition is typically observed in pregnant women who are greater than 30 years of age
• The common signs and symptoms associated with the condition are an enlarged uterus, severe nausea and vomiting, and vaginal bleeding. In rare cases, it may give rise to choriocarcinoma (cancer) of the uterus. Partial Mole of Placenta may be diagnosed through a blood test and ultrasound of the uterus
• In most of the cases, it is treated by dilatation and curettage (D&C) of the uterus. With appropriate treatment, the prognosis of Partial Mole of Placenta is good

The placenta is an organ that connects the developing fetus to the uterine wall.

• It is a disc shaped reddish brown structure that connects the fetus to the mother through the umbilical cord
• The umbilical cord contains two umbilical arteries and one umbilical vein, providing a connection between maternal and fetal blood circulation
• The normal function of placenta is to supply nutrients and oxygen to the fetus from the mother’s blood and remove wastes from the fetal body
• The chorion and amnion are placental membranes. The chorion is the membrane that is present between the growing fetus and the mother. The amnion closely covers and protects the developing embryo

Who gets Partial Mole of Placenta? (Age and Sex Distribution)

• Partial Mole of Placenta can occur in pregnant women of all ages
• It is most common in women over 30 years of age

What are the Risk Factors for Partial Mole of Placenta? (Predisposing Factors)

Risk factors associated with Partial Mole of Placenta include:

• Age above 30 years
• Asians, Africans, or Latin Americans
• Vitamin A deficiency
• History of prior molar pregnancy

It is important to note that having a risk factor does not mean that one will get the condition. A risk factor increases ones chances of getting a condition compared to an individual without the risk factors. Some risk factors are more important than others.
Also, not having a risk factor does not mean that an individual will not get the condition. It is always important to discuss the effect of risk factors with your healthcare provider.

What are the Causes of Partial Mole of Placenta? (Etiology)

• Currently, the exact cause of Partial Mole of Placenta is unknown
• It is believed that certain problems during fertilization might cause the condition; however, the reason behind this remains unidentified

What are the Signs and Symptoms of Partial Mole of Placenta?

The signs and symptoms of Partial Mole of Placenta include:

• Large uterus than expected for dates (gestational period dates)
• Enlargement of ovaries
• Severe nausea and vomiting
• Vaginal bleeding
• Symptoms of hyperthyroidism such as heat intolerance, rapid heart rate, loose stools, restlessness, or nervousness

How is Partial Mole of Placenta Diagnosed?

The diagnosis of Partial Mole of Placenta may include:

• A thorough physical examination, correlated with a complete medical history (including family and social history)
• Blood test for the levels of Beta-hCG
• Ultrasound of the uterus
• Uterine curettage and examination of tissue under a microscope: Cells and tissues are examined by a pathologist under a microscope. Pathological examination is generally considered to be a ‘gold standard’ for a definitive diagnosis. The pathologist arrives at a diagnosis after analyzing pathology findings along with clinical information of the patient. A pathologist may perform special studies on tissue samples to aid in the final diagnosis (if required)

Many clinical conditions may have similar signs and symptoms. Your healthcare provider may perform additional tests to rule out other clinical conditions to arrive at a definitive diagnosis.

What are the possible Complications of Partial Mole of Placenta?

Complications due to Partial Mole of Placenta could include:

• Pre-eclampsia: A pregnancy complication characterized by high blood pressure and signs of kidney damage in the mother
• Recurrence of the condition
• Rare chances of development of choriocarcinoma (a type of malignant cancer)

How is Partial Mole of Placenta Treated?

The treatment measures for Partial Mole of Placenta could include:

• Dilatation & curettage of the uterus: The uterine of     cervix is dilated and entire fetal tissue is removed
• Hysterectomy in case of severe bleeding and in women who do not wish to be pregnant (in future)

How can Partial Mole of Placenta be Prevented?

Currently, there are no definitive methods available to prevent Partial Mole of Placenta.

What is the Prognosis of Partial Mole of Placenta? (Outcomes/Resolutions)

• Overall, the prognosis of Partial Mole of Placenta is good with appropriate treatment
• Women require close follow-up to ensure complete resolution of the condition

Additional and Relevant Useful Information for Partial Mole of Placenta:

The following DoveMed website link is a useful resource for additional information:

https://www.dovemed.com/diseases-conditions/pregnancy-related-disorders/