cystoma of petrous bone associated with hypernephroma and cystic pancreas.
14) The only exception to this behavior is seen with tumors that have a predominantly papilliferous
arrangement; these tumors are more aggressive and would be better classified as papillary cystadenocarcinomas.
The papilliferous surface is considered to result from exposure to the hemodynamic stress of flowing blood.
The differential diagnosis of PFE includes other papilliferous lesions of the heart, such as myxomas, Lambl excrescences, bacterial vegetations, and organizing marantic (thrombotic) endocarditis.
Not every sebaceous nevus advances to the third stage, which is characterized by the transformation of skin appendages into secondary neoplasms--namely, papilliferous syringadenomas and basal cell carcinomas.
3, 4) Jones and Heyl studied 140 cases of sebaceous nevi and found that nearly 20% transformed into papilliferous syringadenomas.