Summary of tumor incidence in mouse model of metastatic breast cancer.

Difinition of abbreviations: shOPN = small hairpin Osteopontin. N.D. = Not Detected. Breast cancer model mice were exposed to lentivirus-shOPN twice a week for 1 or 2 months. After 1 or 2 months, the mice were sacrificed, lungs were collected, and the lesions on the lung surfaces were counted. Incidence and tumor number of lung mass were compared. Data were expressed as means ± S.E.M. £: Number of tumors of smaller than 1.5 mm in diameter. ¶: Number of tumors of greater than 1.5 mm in diameter. ¥: Adenocarcinoma grade was mild. $: Adenocarcinoma grade was moderate. ##: p<0.01 compared to scrambled group. **: p<0.01 compared to control group.