The Surgical Treatment of Pelvic Bone Metastases

Table 1

Characteristics of the different patient classes comparing metastatic lesions in long bones and pelvis.

Class	Long bones	Pelvis
1	Solitary metastatic lesion
	Primary with good prognosis
	(well-differentiated thyroid, prostate, breast sensitive to adjuvants, rectum, clear-cell renal, lymphoma, and myeloma)
	Interval over three years since detection of the primary
2	Pathological fracture at any site	Pathological fracture in periacetabular region
3	Impending fracture in a major weight bearing bone	Supra-acetabular osteolytic lesion
4	Multiple osteoblastic lesions at all sites	Multiple osteoblastic lesions at all sites
	Osteolytic or mixed lesions in nonstructural bone	Osteolytic or mixed lesions in iliac wing and anterior pelvis
	Osteolytic lesion with no impending fracture in major weight bearing bone	Small periacetabular osteolytic lesions