PR. J REMY,CNRI / SCIENCE PHOTO LIBRARY PR. J REMY,CNRI / SCIENCE PHOTO LIBRARY
Ovarian dermoid cyst. Coloured hysterosalpingogram X-ray of the pelvis of a woman a dermoid cyst (top right) containing teeth (indicated by arrows) in her left ovary. A dermoid cyst is a benign tumour, usually present from birth, that contains fatty tissue. Some dermoid cysts contain misplaced tissue types such as fragments of bone, cartilage, or in this case a tooth. They occur as painless swellings, sometimes after injury, but may cause discomfort and abdominal swelling. A hysterosalpingogram is taken after the introduction of a radio-opaque material to the uterus via a catheter in the vagina (bottom centre).
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