The most common ovarian germ cell tumour found in women of reproductive age is a dermoid cyst, also known as a mature cystic
teratoma. They are generally unilateral, yet they are bilateral 10-12% of the time. They are made of ectodermal tissues like skin, hair
and nails, mesodermal tissues like fat and muscle and endodermic tissues derived from germ cell layers. Adnexal torsion is thought
to occur in 8% of instances of presumed benign ovarian tumour during pregnancy, most frequently at the end of the first trimester
and during the second trimester. Ultrasound has a decreased specificity for malignancy it is still the gold standard for
characterising an ovarian tumour during pregnancy. Pelvic MRI is accurate in spotting ovarian tumours during pregnancy. In this
case, a 22-year-old primigravida who was 39 weeks pregnant and living in a rural region reported abdominal pain, a rare mass felt
during a clinical examination, a lack of regular follow-ups and an important finding over looked. A big lump measuring 20x15 cm
that was producing pressure shifts across the lungs and respiratory discomfort was discovered during the patient's
ultrasonography after being admitted. The patient was shifted for an emergency caesarean section. A 2.5 kg healthy baby was
delivered. An enormous tumour that was successfully removed was seen twisting an ovary. Dermoid and other benign ovarian cyst
patients had favourable pregnancy results, including perinatal outcomes. Since problems are exceedingly rare, the cysts should,
wherever feasible, be handled conservatively.
Keywords: pregnancy, dermoid cyst, reproductive age, germ cell tumour