The literature on blood cysts of the ovary presents a fascinating study, particularly the literature of recent years, and especially that relating to the tarry and the chocolate cysts. The greatest debate has been waged concerning the cysts that have an epithelial lining.
In 1899, Russell1 described an ovarian cyst and said that it arose from an aberrant remnant of Müller's duct. In 1905, Pick2 reported a case of adenoma endometrioides ovarii. Since then considerable interest has been taken in these structures. In 1917, Blair Bell3 suggested the term endometrioma, and Sampson has since used the term endometriosis.
In 1920, Sampson4 gave his classic description of the "perforating chocolate cysts" of the ovary. He suggested that they arose by the transplantation of pieces of uterine mucosa through the fallopian tubes on to the surface of the ovary, where they grew and developed.
During the last decade,