Table 1: Pheochromocytoma of the adrenal gland scoring scale (PASS) [38].


Nuclear hyperchromasia1
Profound nuclear pleomorphism1
Capsular invasion1
Vascular invasion1
Extension into adipose tissue2
Atypical mitotic figures2
Greater than 3 of 10 mitotic figures high-power field2
Tumor cell spindling2
Cellular monotony2
High cellularity2
Central or confluent tumor necrosis2
Large nests or diffuse growth (>10% of tumor volume)2