Adenoacanthoma of the endometrium: a separate entity or a histological curiosity?

In a series of 42 patients with endometrial adenoacanthoma and of 53 with adenocarcinoma, age at the time of diagnosis, age at the onset of the menopause, gravidity, pathological staging, and survival were compared to see if there was any significant difference, apart from morphology, between the two tumours. No significant differences could be established, and it was concluded that adenoacanthoma should be regarded as a histological variant of adenocarcinoma and not as a separate entity.