Keywords:
Neoplasia, Cancer, Diagnostic procedure, MR, Oncology, Musculoskeletal soft tissue
Authors:
A. Neroladaki1, M. HAMARD1, L. C. C. Farracho1, E. Saiji2, M. Becker2, S. Boudabbous2; 1Genève/CH, 2Geneva/CH
DOI:
10.26044/essr2019/P-0066
Results
A total of 14 features were assessed.
Among these 14 features,
the degree of intra-tumoral enhancement (>51%),
internal low signal intensity components on T2,
intra-tumoral hemorrhage and peri-tumoral enhancement were significantly different between low and high grade tumors for both readers (p≤0.05),
whereas signal heterogeneity on fluid sensitive sequence (>2/3 of the tumor),
tumor margin (poorly or partially defined),
and the presence of a fascia tail sign were significantly different between low and high grade tumors only for reader 1 (p≤0.04)(figure 4).
For those features,
which were significantly different in low versus high grade tumors for both readers,
the combination of tumor enhancement “and” internal low signal T2 components “and” intra-tumoral hemorrhage “and” peri-tumoral enhancement yielded a specificity of 95% for reader 1 and 100% for reader 2 (example in figure 5),
whereas the “or” combination of the four features increased sensitivity to 98% for reader 1 and 95% for reader 2,
respectively.