Production of Nitric Oxide and Expression of Inducible Nitric Oxide Synthase in Ovarian Cystic Tumors

Table 2

Immunohistochemical staining of iNOS in nonneoplastic, benign, and malignant ovarian tissue samples.

	Strong intensity of iNOS expression(a)	Weak intensity of iNOS expression(b)
Nonneoplastic tumors (𝑛=15)	5 (33.3%)	10 (66.7%)
Benign neoplasia (𝑛=21)	6 (28.6%)	15 (71.4%)
Malignant neoplasia (𝑛=18)^∗+	16 (88.9%)	2 (11.1%)

^(a) Received a score of 2-3 for intensity of iNOS expression.
^(b) Received a score of 0-1 for intensity of iNOS expression.
^∗𝑃=.0014 compared to nonneoplastic tumor samples.
⁺𝑃=.0003 compared to benign neoplasia samples (Fisher’s exact test).