Malignant evolution of choroid plexus papilloma

Choroid plexus tumors are rare CNS neoplasms. The distinction between choro id plexus papilloma (CPP) and choroid plexus carcinoma (CPC) is made on the basis of clinical and histological criteria. Malignant evolution of CPP ma y occur, and the presence of mitotic figures in CPP may predict the likelih ood of recurrence or malignant evolution. Close surveillance is mandated fo r these patients. We report on two such cases of CPP that transformed to CP C at the time of recurrence. Copyright (C) 1999 S. Karger AG, Basel.