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While it is impossible to precisely determine the manner in which these arise, there is suggestive evidence that early structures incorporated within the caudal cell mass of the embryonic tail may play an important role. The present paper reviews the basis for this speculation from both the literature and a series of 136 cases.<\/jats:p>","DOI":"10.1002\/tera.1420250209","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T14:41:21Z","timestamp":1118500881000},"page":"201-213","source":"Crossref","is-referenced-by-count":54,"title":["Pathogenesis of congenital tumors and malformations of the sacrococcygeal region"],"prefix":"10.1002","volume":"25","author":[{"given":"Ronald J.","family":"Lemire","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. 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