My husband had a CT scan for another problem and multiple solid tumours have been shown on both kidneys. The largest being 4cm.
5 months after their discovery we have seen the urologist who says they are malignant cancers and is repeating the scan and arranging a renal biopsy of the larger tumour, with a view to partial nephrectomy and ablation.
I have googled this situation but only found the rare benign oncocytoma that exists in this multiple form however the urologist never mentioned this possibility
edit: further research has provided me with more info and I now know most types of rcc can be multi focal and bilateral.
Now hoping they are papillary as the prognosis appears better.