This document discusses bone tumors of the pelvis based on a study of 3,398 cases from a bone tumor institute in Italy between 1900-2012. It finds that the most common tumors were primary malignant tumors (40.7%), followed by bone metastases (24.9%), benign tumors (25.4%), and systemic tumors (9.0%). For benign tumors, the most frequent diagnoses were osteochondroma and bone cysts. Examples of specific benign and malignant bone tumors are also presented along with imaging findings.
16. BENIGN TUMORS
Benign notochordal cell tumor (BNCT)
SIMILARITIES between BNCT and chordoma
Location: bone
Immuno: +
CK18 and vimentin, S-100 protein,
EMA, CAM5.2,
AE1/AE3, brachyury
MRI :
hypoT1 et hyperT2
17. BENIGN TUMORS
Benign notochordal cell tumor (BNCT)
DIFFERENCES between BNCT and chordoma
BNCT
Chordoma
Growth
minimal; sclerosis
Slow but aggressive
Sft tissues
Histologiy
Thick bone trabeculae
myxoïd component
Rx and CT
sclerotic
normal cortex and soft tissues
Lytic
Soft tissues invaded
MRI
no cm uptake
Uptake after injection
26. BENIGN TUMORS
Benign notochordal cell tumor (BNCT)
29 year old man, pain for 9 months.
BNCT invading the soft tissues !
BNCT a still moving entity!