testicular intraepithelial neoplasia
(tes-TIH-kyoo-ler IN-truh-eh-pih-THEE-lee-ul NEE-oh-PLAY-zhuh)
Abnormal cells are found in the tiny tubules where the sperm cells begin to develop. These abnormal cells may become cancer and spread into nearby normal tissue. All tumor marker levels are normal. Also called stage 0 testicular carcinoma in situ and testicular intratubular germ cell neoplasia.