Tumour & tumour like: Enchondroma (EC)

Cartilagenous meduallry tumour

EC of rib:
Second most common benign rb tumour (most common FD)
Most common site - anterior
Lytic lesion, mild expansion, well defined sclerotic margins, punctate calcification, endosteal scalloping
When calcification is not evident, MR is often helpful revealing hyaline cartilage as a lobulated hyperintense foci on T2 and low-to-int on T1

  1. Hughes et al. Benign primary tumours of the ribs. Clin rad (2006): 61:314-322
  2. .