Table 2.
Frequency and degree of immunoreactivity for each antibody in 100 malignant fibrous histiocytomas (MFHs)
| Vimentin (%) | Desmin (%) | SMA (%) | MSA (%) | HCD (%) | CD34 (%) | S-100 (%) | EMA (%) | CK (%) | |
| MFH | 100 (100) | 17 (17) | 30 (30) | 14 (14) | 2 (2) | 22 (22) | 0 | 5 (5) | 13 (13) |
| Pleomorphic (n=47) | 47 (100) | 15 (32) | 22 (47) | 11 (24) | 2 (4) | 2 (4) | 0 | 5 (11) | 7 (15) |
| 0 | 0 | 32 | 25 | 36 | 45 | 45 | 0 | 42 | 40 |
| 1+ | 0 | 11 | 8 | 4 | 2 | 1 | 0 | 4 | 5 |
| 2+ | 12 | 3 | 4 | 7 | 0 | 1 | 0 | 1 | 2 |
| 3+ | 35 | 1 | 10 | 0 | 0 | 0 | 0 | 0 | 0 |
| Myxoid (n=53) | 53 (100) | 2 (4) | 8 (15) | 3 (6) | 0 | 20 (38) | 0 | 0 | 6 (11) |
| 0 | 0 | 51 | 45 | 50 | 0 | 33 | 0 | 0 | 47 |
| 1+ | 0 | 1 | 3 | 2 | 0 | 8 | 0 | 0 | 4 |
| 2+ | 22 | 1 | 3 | 1 | 0 | 5 | 0 | 0 | 2 |
| 3+ | 31 | 0 | 2 | 0 | 0 | 7 | 0 | 0 | 0 |
CK, cytokeratin; EMA, epithelial membrane antigen; HCD, heavy-caldesmon; MSA, muscle specific actin; SMA, α smooth muscle actin.
Degree of immunoreactivity: 0, negative; 1+, less than 10% positivity; 2+, 10–50% positivity; 3+, more than 50% positivity.