What do you think of the criteria for determining the malignancy of "Oncocytic adrenocortical neoplasm" (Lin-Weiss-Bisceglia (LWB) system)? I refer in particular to venous invasion if this is the only criterion to indicate a malignant behavior. It could not be a "prolapse" into the veins as observed in the thyroid or kidney? Do you know other criteria to indicate the prognosis of these rare tumors?