In some of our latest works on pathology and gynecology we find this growth mentioned and thus defined:Syncytioma malignum is a malignant neoplasm exhibiting the morbid physiologic characteristics of sarcoma and carcinoma.1It is a degenerative malignant disease of the sarcomatous type originating in the decidual structures of the pregnant woman and tending to a rapidly fatal issue.2It is a hemorrhagic tumor, a malignant growth developing in the body of the uterus, which belongs to the sarcoma group, and to a variety never before observed.3It is derived from the syncytium, and the syncytium is the undifferentiated embryologic tissue, and the tumors derived from it are neither epithelial nor sarcomatous.4It is a peculiar neoplasm of the uterus, peculiar in that it occurs only after pregnancy, in that its parenchyma is derived from two forms of cells, and, finally, in that its origin
BRANSON LH. SYNCYTIOMA MALIGNUM.. JAMA. 1905;XLV(23):1705–1709. doi:10.1001/jama.1905.52510230005001a
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