A Rokitansky nodule or dermoid plug refers to a solid protuberence projecting from an ovarian cyst in the context of a mature cystic teratoma. It often contains calcific, dental, adipose, hair and/or sebaceous components 1.
- Ultrasound features of dermoid cysts. (A) Rokitansky nodule with a strong acoustic shadow. (B) Acoustic shadows and bright echoes representing hair in the cyst. (C) Unusual but interesting presentation of a dermoid cyst which has been described as ‘floating balls’ - secondary to hyperechoic intracystic fat balls.
Teratoma with fully formed tooth and hair. A teratoma is an encapsulated tumor with tissue or organ components, which whilst normal in themselves, may be quite different from surrounding tissues. Teratomas have been reported to contain hair, teeth, bone and, very rarely, more complex organs and body parts such as eyes, hands, feet, or other appendages. This particular teratoma consists of a tooth and hair which have formed inside an ovary. UCL Pathology Collections: Photograph Gemma Angel.