II. Definitions
- Teratoma
- Non-seminomatous germ cell tumor
- Pluripotent cells, containing various germ cell origins (endoderm, mesoderm, ectoderm)
- Found in the Testis, ovary as well as extra-genital sights (e.g. CNS, mediastinum, lung, Stomach, Sacrum)
- Mature Teratomas contain well-differentiated adult type tissues (e.g. calcified teeth, hair)
- Immature Teratomas contain fetal type tissues
- Teratomas may be benign or malignant
- Benign Ovarian Teratoma
- Benign ovarian germ cell tumor
- Dermoid Ovarian Cyst (Mature Ovarian Teratoma)
- Type of Ovarian Cystic Teratoma, typically unilateral
- Presents as Ovarian Mass often with sebaceous material, hair, calcified teeth, fat, bone, Muscle and other tissue
- Mature Ovarian Teratomas without fetal tissue types are benign in most cases (>98%)
III. Imaging: Ultrasound findings
- Ovarian Mass with hyperechoic area with acoustic shadow
- Fluid-fluid level with echogenic fluid above
- Hyperechoic lines and spots (dermoid mesh)