prostatic intraepithelial neoplasia
[pros-tat-ick in-trah-ep-ith-EE-lee-uhl hi-per-play-zhuh]
also called PIN. A condition in which there are changes in how the prostate gland cells look under the microscope. The changes are classified as low-grade, meaning that the cells look almost normal, or high-grade, meaning that they look more abnormal. The condition is not cancer, but high-grade PIN might lead to the development of cancer in some men. See also prostate, atypia.