The authors report the third case of primary adenocarcinoma of the rectovag
inal septum without associated endometriosis and discuss the pathogenesis o
f this tumour. Some of the tumour cells were stained with OC 125 antibody w
hich recognises epithelium of coelomic origin; adenocarcinoma of the rectov
aginal septum may arise directly from embryological Mullerian remnants. (C)
2001 Elsevier Science ireland Ltd. All rights reserved.