RT Journal Article SR Electronic T1 Association of endodermal sinus tumour, testicular teratoma and alpha1-fetoprotein JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 223 OP 226 VO 115 IS 3 A1 G. Gariepy A1 M. Lafortune A1 R. Poisson YR 1976 UL http://www.cmaj.ca/content/115/3/223.abstract AB An endodermal sinus tumour in the retroperitoneal region was associated with the presence of alpha1-fetoprotein (AFP) in the patient's serum. At autopsy a simple cystic teratoma of the right testicle was also found. The association of these two tumours has been reported before. The classification of these malignant germ-cell tumours and an understanding of their evolution may be aided by the discovery that AFP is often found in the patient's serum.