Table 4.
Diagnostic differences in cases with zero concordance
| Expert diagnosis | Initial diagnosis | Frequency (n = 70) |
|---|---|---|
| NOS Sarcoma | MPNST | 1 |
| NOS Sarcoma | Angiosarcoma | 1 |
| NOS Sarcoma | Unclassified malignant tumor | 6 |
| NOS Sarcoma | Leiomyosarcoma | 1 |
| NOS Sarcoma | GIST | 1 |
| NOS Sarcoma | Chondrosarcoma | 1 |
| NOS Sarcoma | Embryonic Rhabdomyosarcoma | 1 |
| NOS Sarcoma | Benign Tumor | 1 |
| NOS Sarcoma | Liposarcoma | 1 |
| NOS Sarcoma | Leiomyosarcoma | 2 |
| Leiomyosarcoma | Benign Tumor | 2 |
| Leiomyosarcoma | NOS Sarcoma | 1 |
| Osteosarcoma | NOS Sarcoma | 1 |
| Osteosarcoma | Unclassified malignant tumor | 1 |
| Osteosarcoma | Melanoma | 1 |
| Lipoma-like Liposarcoma | Benign Tumor | 1 |
| Lipoma-like Liposarcoma | Fibrosarcoma | 1 |
| Lipoma-like Liposarcoma | Unclassified malignant tumor | 1 |
| Liposarcoma | Benign Tumor | 1 |
| Liposarcoma | NOS Sarcoma | 2 |
| Dedif. Liposarcoma | Leiomyosarcoma | 2 |
| Dedif. Liposarcoma | Unclassified malignant tumor | 1 |
| Dedif. Liposarcoma | NOS Sarcoma | 1 |
| Myxofibrosarcoma | Liposarcoma | 1 |
| Myxofibrosarcoma | NOS Sarcoma | 3 |
| Myxofibrosarcoma | Sarcomatoid Carcinoma | 1 |
| Myxofibrosarcoma | Chondrosarcoma | 1 |
| Sarcomatoid Carcinoma | Leiomyosarcoma | 1 |
| Sarcomatoid Carcinoma | NOS Sarcoma | 3 |
| Angiosarcoma | Unclassified malignant tumor | 1 |
| Angiosarcoma | Synovial sarcoma | 1 |
| Benign Tumor | Inflammatory MyxofibroSarcoma | 1 |
| Benign Tumor | Leiomyosarcoma | 1 |
| Benign Tumor | Well-differenciated lipoma-like Liposarcoma | 1 |
| Epithelioid Sarcoma | Unclassified malignant tumor | 1 |
| Epithelioid Sarcoma | Synovial sarcoma | 1 |
| PNET/Ewing sarcoma | Carcinoma | 2 |
| PNET/Ewing sarcoma | Unclassified malignant tumor | 3 |
| Rhabdomyosarcoma | Leiomyosarcoma | 1 |
| GIST | NOS Sarcoma | 1 |
| Carcinoma | Phyllodes Tumor | 1 |
| Carcinoma | NOS Sarcoma | 1 |
| Solitary fibrosis/malignant Tumor | GIST | 1 |
| Uterine Leiomyosarcoma | Benign Tumor | 1 |
| PEComa | Unclassified malignant tumor | 1 |
| Fibrosarcoma | Unclassified malignant tumor | 1 |
| Endometrial Stromal Sarcoma | Leiomyosarcoma | 1 |
| Epithelioid Hemangioendothelioma | Carcinoma | 1 |
| Inflammatory Myxofibrosarcoma | Epithelioid Sarcoma | 1 |
| Unclassified malignant tumor | Carcinoma | 1 |
| Low grade fibromyxoid Sarcoma | Benign Tumor | 1 |
| Kaposi sarcoma | NOS Sarcoma | 1 |
| Synovial sarcoma | Benign Tumor | 1 |
| Dermatofibrosarcoma protuberans | Benign Tumor | 1 |
NOS: not otherwise specified
PNET: primitive neuroectodermal tumor
GIST: gastrointestinal stromal tumor
PEComa: malignant perivascular epithelioid cell tumor
MPNST: malignant peripheral nerve sheath tumor