Table 1 EZH2 staining pattern in HB relative to histopathologic subtype in tumor.

From: Investigating the oncogenic role of aberrant EZH2 in hepatoblastoma

 

H&E

EZH2

Case

Histologic patterns

Staining by histologic pattern

Overall staining pattern

24

HCC-like

0

0

25

Cartilage

0

0

27

CF, rare multinucleated and pleo, B, pseudoacinar, possible melanin

3 + (unclear which histologic pattern)

3 +  < 5%

28

Bone, cartilage

1 + bone and cartilage

1 +  < 5%

30

CF, E, B, rare pleo

1 + E, 1 + CF

1 + 10%

38

CF, B, cholangio

2–3 + B/cholangio, 2 + CF

1 + 10%; 2 + 70%; 3 + 20%

41

CF, E, B

3 + B/E, 1–2 + CF

1–2 + 30%; 3 + 70%

42

HCC-like (pleo, steatosis)

1–3 +

1 + 10%; 2 + 50–60%; 3 + 30%

48

Fetal-like, macro, mild pleomorphism

2–3 + 

2 + 10–15%; 3 + 10–15%

50

CF, B, osteoid

2 + CF, 0 osteoid

2 +  < 5%

52

HCC

1–3 + 

1 + 50%; 2 + 20%; 3 + 20%

53

CF, E, B

1 + E

1 + 5–10%

64

Osteoid

3 + osteoid

3 + 100%

69

CF

1 + CF

1 +  < 5%

74

CF, E, B, mild pleo

2–3 + E

2 + 5–10%; 3 + 5–10%

79

HCC

1–3 +

1 +  < 5%; 2 +  < 5%; 3 +  < 5%

81

CF, E

3 + E, 0–2 + CF

0–1 + 5%; 2 + 5%; 3 + 90%

84

HCC

1–3 +

1 +  < 5%; 2 +  < 5%; 3 + 90%

105

HCC (difficult to tell border of background from tumor)

1–3 +

1 +  < 5%; 2 +  < 5%; 3 +  < 5%

  1. EZH2 is overall more prevalent in embryonal histology. Extreme variability is observed in staining of fetal and mixed epithelial histology. HCC generally has less EZH2 staining. (N = 19) Key: CF-crowded fetal, E- embryonal, B-blastemal, macro- macrotrabecular, cholangio- cholangioblastic, pleo- pleomorphic.