Ovarian teratomas are congenital, primarily deriving from primordial germ cells. Teratomas consist of tissues from multiple embryonic layers, mostly being immature types. Most ovarian teratomas are cystic. Depending on the degree of tissue differentiation, teratomas can be classified as benign or malignant. Benign teratomas, also known as mature teratomas, are more common in women aged 20-40 and are usually unilateral and either round or ovoid in shape. A portion of these teratomas are malignant, typically found in younger patients, roughly aged 11-19 years, and this condition has a poorer prognosis, requiring timely surgical treatment.