. Author manuscript; available in PMC: 2013 Oct 19.

Published in final edited form as: Obstet Gynecol. 2012 Nov;120(5):1160–1175. doi: 10.1097/aog.0b013e31826bb121

Table 4.

Subjective histological EIN criteria. All criteria must be fulfilled for a diagnosis of EIN to be made

EINCriterion	Comments
Architecture	Area of glands exceeds that of stroma
Cytology	Cytology differs between architecturally crowded focus and background
Diameter > 1 mm	Maximum linear dimension of the lesion exceeds 1 mm
Exclude mimics	Benign conditions with overlapping criteria: basalis, secretory, polyps, repair, etc.
Exclude cancer	Carcinoma if maze-like meandering glands, solid areas, or appreciable cribriforming