CASP3 and neoplasm: The present study aims to evaluate the immunoexpression rates of Ki-67 and Caspase-3 proteins in UA subtypes, CAM and DF, and to verify the differences in the immunostaining of these proteins between the cells located in the lumen and cystic capsule regions of MUA since the neoplastic epithelial cells of MUA are closer to the bone being reabsorbed by the neoplasm.