Table 4. Open in new tab Types of...

Table 4.

Types of primary bone sarcoma and corresponding clinical or radiological features indicative of IPN that are likely to progress to metastasis.

Type of primary bone sarcoma	Clinical or radiological features indicative of IPN likely to progress to metastasis
Osteosarcoma	Size >5 mm in maximum diameter²⁵ IPN number ≥4 IPN presenting bilaterally
Ewing sarcoma	IPN number ≥4 IPN presenting bilaterally
Chondrosarcoma	High grade Size >5 mm in maximum diameter Lobulated margins on CT Partial or incomplete calcification in IPN measuring >10 mm IPN located centrally or both centrally and peripherally

Type of primary bone sarcoma	Clinical or radiological features indicative of IPN likely to progress to metastasis
Osteosarcoma	Size >5 mm in maximum diameter²⁵ IPN number ≥4 IPN presenting bilaterally
Ewing sarcoma	IPN number ≥4 IPN presenting bilaterally
Chondrosarcoma	High grade Size >5 mm in maximum diameter Lobulated margins on CT Partial or incomplete calcification in IPN measuring >10 mm IPN located centrally or both centrally and peripherally