Table. 1 Histologic subtypes, immunohistochemical and molecular features of diffuse malignant peritoneal mesothelioma
Histological subtypes [N (%)] | |
‑ Epithelioid | 34 (68%) |
‑ Biphasic | 12 (24%) |
‑ Sarcomatoid | 4 (8%) |
CDKN2A status [N (%)] | |
‑ Homozygous deletion | 30 (60%) |
‑ Heterozygous deletion | 12 (24%) |
‑ No deletion | 8 (15%) |
BAP1 loss [N (%)] | 43 (86%) |
PD-L1 (tumor proportion score) [N (%)] | |
‑ < 1% | 40 (98%) |
‑ 1–49% | 1 (2%) |
‑ ≥ 50% | 0 |
Ki67 [%, median (Q1-Q3)] | 25.5 (15.25–41) |