In L' Union Médicale, July 13, ult., is an excellent article by M. Pierre Delbet, the Parisian surgeon, giving a resumé of the pathogeny of heterotopic tumors (dermoid cysts), which is abstracted from the large work on clinical and operative surgery by Professor Le Dentu and the same author. The oldest theory seems to be that of Geoffrey Saint-Hilaire— that of diplogenesis by inclusion. This author arranged these tumors in a long series, beginning with the most simple forms, as those of the eyebrow, and going through the more complex varieties in the ovary and sacro-coccygeal region, and ending with parasitic and autositic monsters. In other words, he believed that simple dermoid cysts are to be considered as the "prodigiously incompletely developed" remains of a primitively distinct individual. This theory was strongly combated by Lebert and Broca. The latter pointed out that all dermoid cysts do not contain authentic
PATHOGENY OF DERMOID CYSTS. JAMA. 1895;XXV(8):331–332. doi:10.1001/jama.1895.02430340031003
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