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Since the review of the literature and the report of a case by one of us (Dr. Hansmann), which coupled certain gross as well as histologic features of the tumor concerned with residual structures of the neurenteric canal, reports of composite tumors immediately anterior to the sacrum have from time to time appeared in the medical literature. A review of these cases has convinced us that the idea of histogenesis is still vague in the reported cases. If the interpretation is correct that no inconsiderable number of these retrorectal tumors arise from remnants of the neurenteric canal, this information would be important in the study of the clinical cases preliminary to the therapeutic removal of the aberrant tissue. We have recently had another patient with a rather unusual retrorectal tumor. The nature of the tumor, the excellent result from surgical removal and the apparent need for a reiteration of the
HANSMANN GH, BERNE CJ. SACROCOCCYGEAL TERATOMAS. Arch Surg. 1932;25(6):1090-1097. doi:10.1001/archsurg.1932.01160240082007