Abstract: Ovarian tumours are more frequently seen in adults, although they are quite uncommon in youngsters. The majority of ovarian masses seen during the premenstrual or infancy phases are benign functioning cysts, which are non- cancerous tumours. Ovarian mass symptoms and clinical indications are typically non-specific. Thus, it might be challenging to get the right diagnosis before surgery, and early care may be required to preserve the patients life and fertility. 8–10% of all ovarian cancers are epithelial tumours, which are histologically categorised as mucinous or serous. Cystadenoma, of which 75% are serous and 25% are mucinous, is the most frequent benign ovarian tumour. On the surface, mucin-filled tumours are distinguished by cysts of various sizes that have not invaded the surrounding tissue. Before being found, they might grow to a large size, although this does not always mean they are cancerous.