Table 3. Correlation of E-cadherin and Snail expression in primary ovarian cancer compared to the corresponding metastasesa.

	E-cadherin (n)	Snail (n)
Primary positive	35	17
Primary negative	12	30
Primary positive, metastasis positive	33 (94.3% of n=35)	16 (94.1% of n=17)
Primary positive, metastasis negative	2 (5.7% of n=35)	1 (5.9% of n=17)
Primary negative, metastasis negative	8 (66.7% of n=12)	21 (70.0% of n=30)
Primary negative, metastasis positive	4 (33.3% of n=12)	9 (30.0% of n=30)

^an=47 cases for which both the primary tumours and their corresponding metastases were available.

Primary, primary ovarian cancer.

Metastasis, corresponding metastases of primary ovarian cancers.

Positive, preserved immunoreactivity for E-cadherin (3+) or Snail positive (1+, 2+, and 3+).

Negative, reduced immunoreactivity for E-cadherin (0, 1+, and 2+) or Snail negative (0).