English Journal

Hirayama Y1, Kubota M, Kakita A, Kawasaki T, Hasegawa G, Tanaka S, Ohtaki M, Yamazaki S, Okuyama N, Yagi M, Naito M.
Pediatric surgery international.Pediatr Surg Int.2007 Jul;23(7):715-20. Epub 2007 Mar 10.
A sacral parasite is a rare congenital anomaly classified etiologically as duplicitas asymmetros, where the parasitic mass is regarded as the tissue remnants of an unequally conjoined twin. We, herein, report a case of a sacral parasitic mass found in a female neonate. A huge sacral mass was found a
PMID 17351782

Japanese Journal

先天異常 : 日本先天異常学会会報 : official journal of Congeital Anomalies Research Association of Japan 11(2), 67-73, 1971-06-30
NAID 110002728830

先天異常 : 日本先天異常学会会報 : official journal of Congeital Anomalies Research Association of Japan 9(4), 250-251, 1969-12-25
NAID 110002729085