TABLE 2.

Expression of myoid and melanocytic immunohistochemical markers in uterine corpus PEComas

IMMUNOHISTOCHEMISTRY RESULT			EXTENT OF POSITIVITY
IHC	n	POSITIVE (%)	n	<50% OF CELLS	≥50% OF CELLS
HMB45	72	71/72 (99%)	57	31/57 (54%)	26/57 (46%)
Melan-A	46	21/46 (46%)	20	13/20 (65%)	7/20 (35%)
MiTF	21	14/21 (66%)	12	5/12 (42%)	7/12 (58%)
S100	48	5/48 (10%)
Tyrosinase	3	0/3 (0%)
SMA	68	53/68 (80%)	39	16/39 (41%)	23/39 (59%)
Desmin	62	39/62 (63%)	18	7/18(39%)	11/18 (61%)
Caldesmon	22	17/22 (77%)	5	3/5 (60%)	2/5 (40%)
Cathepsin	12	12/12 (100%)
Myosin/MSA	4	2/4 (50%)