I see you usually want age and medical history from most so here goes!
I'm only 23 years old, no previous pregnancies, no cramping/pain symptoms, mother had non-cancerous dermoids measuring 6 cm removed at age 41 on both ovaries, mother did not have any problems with conceiving children or any history of miscarriage. Only cancer history in entire family is a grandfather with liver cancer, but was probably contributed to by excessive drinking.
Dear Jenny
first of all, congratulations on your pregnancy. that is very exciting. thank you for the complete information.
Most ovarian cysts and tumors are benign. At your age this is especially so. In pregnancy, the risks of a mass on the ovary are related to the potential for rupture or twisting of the mass (called torsion)
It is fairly safe to operate during pregnancy when it is not a crisis . However, there is always a risk of miscarriage. A crisis would be an active infection, a ruptured appendix and so on.
All the major organs form in the first 3 months which is why we try to wait until the second trimester to operate . There has not been any compelling data to suggest that general anesthesia and surgery after the first 12 weeks causes birth defects.
So the question in pregnancy is always - can it wait until postpartum or is there enough risk to recommend surgery now?
In general, my personal rule is that if a cyst or mass is less than 5 cm, it is usually not big enough to twist or rupture.
I would suggest that you seek a real second opinion. It is important to have an exam and to have a doctor review the films. There may be something else about the appearance of this mass that is concerning.
On the other hand if it does look like a classic dermoid, it will not grow that quickly and waiting maybe just fine
best wishes