Diagnostic performance of computed tomography-guided percutaneous bone biopsy in musculoskeletal oncology: A single-center cohort study

Table 1 Legacy Society of Interventional Radiology A-F outcome-based complication classification[10]

SIR class	Severity group	Definition
A	Minor complication	No therapy required; no consequence
B	Minor complication	Nominal therapy required; no consequence; may include overnight admission for observation only
C	Major complication	Requires therapy; minor hospitalization for less than 48 hours
D	Major complication	Requires major therapy, unplanned increase in level of care, prolonged hospitalization for more than 48 hours
E	Major complication	Results in permanent adverse sequelae
F	Major complication	Death