The first documented description of hydatidiform mole dates back to 400 BC when Hippocrates (470–410 BC) explained its formation through the consumption of dirty water by the pregnant woman. Interestingly, in 1276, the countess of Henneberg reportedly died after giving birth to “as many children as there were days in the year”. In 1752, William Smelie coined the terms mole and hydatidiform to describe the pathology as a bunch of grapes consisting of different sizes. Indeed, this condition that we have come to recognize as a hydatidiform mole (HM) has fascinated humans for centuries. But, it was not until 1903 when it was formally recognized as a clinical entity.

Parasitic dermoid cysts may form from autoamputation of the ovarian mass secondary to torsion or rupture. It may then reimplant in surrounding structures and undergo subsequent neovascularization and further growth. The true incidence of these cases is unknown, however, a study reported a 0.04% incidence among 1,007 cases of dermoid cysts. This report describes the case of a 30-year-old multigravida who presented with an ultrasound finding of an ovarian dermoid cyst, which, upon laparoscopic surgery, turned out to be a parasitic dermoid cyst adherent to the bladder, with grossly normal bilateral ovaries. Theories on the development of parasitic dermoid cyst are also presented.
Human ; Female ; Adult: 25-44 yrs old ; dermoid cyst ; laparoscopy