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Copyright ©The Author(s) 2016.
World J Methodol. Mar 26, 2016; 6(1): 87-92
Published online Mar 26, 2016. doi: 10.5662/wjm.v6.i1.87
Table 1 Malignant perivascular epithelioid cell tumor’s criteria[4]
FeaturesDefinition
Tumor size greater than 5 cm
Infiltrative growth patternBenign (none criteria)
High nuclear gradeMalignant (2 or more features)
NecrosisUncertain malignant potential (1)
Mitotic activity > 1/50 high power field
Aggressive clinical behavior