Table 2.

Mucinous carcinomas involving the ovary- pathologic features associated with reviewer interpretation as primary ovarian mucinous carcinoma

Pathologic feature	N with feature	% cases with feature diagnosed as primary*
Diameter <13 cm	16	--
Bilaterality	24	29
Nodularity	12	0
Surface involvement	22	23
Infiltrative invasion	34	23
Single neoplastic cells	28	21
Signet ring cells	9	33
Small glands/tubules	34	26
Hilar involvement	5	0
Necrotic luminal debris	8	0
Expansile growth pattern	17	88
Complex papillae	16	94

^*Number and % of cases with feature present interpreted by reviewer #1 as primary mucinous carcinoma.

Pathologic feature listed above the solid line have been associated with mucinous carcinoma metastatic to the ovary, while those below the line with primary mucinous ovarian carcinoma; from Lee and Young.(9)