Mast Cells in Renal Cancer: Clinical Morphological Correlations and Prognosis.

Morphofunctional activity of mast cells in renal cancer is studied on specimens from the center of the tumor, peritumorous zone (with an obligatory fragment of the pseudocapsule), and from renal tissues maximally distant from the tumor. The counts and areas of tumor cells were maximum in the peritumorous zone in comparison with intact kidney tissue and central zone of the tumor. Analysis of correlations revealed a direct correlation between the tumor cell count in the peritumorous zone and some clinical morphological parameters of the tumor (anaplasia degree, size, presence of invasion and metastases, and angiogenesis). The count of mast cells in the renal peritumorous zone inversely correlated with 5-year survival: 100% cumulative 5-year survival in patients with mast cell count <6.7±1.6 per field of view.