Orain I, Buzelin F, Ferry N
J Urol (Paris). 1987;93(1):1-9.
Tubulo-papillary tumors constitute a particular group of renal tumor. A study of 20 cases treated personally and review of 130 cases reported in the literature showed: hypo or heterogenic ultrasound images, hypovascularization on angiography, particular density on CT scan image. Histologically they can be distinguished from clear cell epithelioma not only by their appearance (papillary and tubular structures, cystic and hemorrhagic changes) but also by the frequency of stage I on histology. The latter feature is not the only explanation for a more favorable prognosis: other significant factors are necrotic lesions and degree of anisocaryocytosis of epithelial proliferation.
