Page 229 - Reconstructive Techniques in Musculoskeletal Tumor Surgery

General discussion
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Table 1. Classi cation of complications for endoprosthetic reconstructions in orthopaedic oncology.
Category
Type
Subtype
Description
Time of diagnosis1
No. of patients a ected2
No. of patients needing a re- intervention
No. of implants removed as a result
Mechanical
Type 1: Soft tissue
1A. Functional 1B. Coverage
Instability or dislocations (including dislocations treated with closed or open reduction)
Non-mechanical
Type 4. Infection3
3D. Wear
3E. Bone resorption 4A. Acute
4B. Late or chronic 4C. Secondary acute 5. Local tumor relapse
Wear of liner or insert
Massive periprosthetic bone resorption <6 weeks after implantation
>6 weeks after implantation
<6 weeks after secondary procedure Recurrence or progression of tumor
Type 2: Aseptic loosening
N/A
3A. Periprosthetic fracture
Radiographic or clinical signs of loosening in the absence of infection
Type 3: Structural failure
Fracture of periprosthetic bone Breakage of stem or locking mechanism Breakage of liner or screw
Type 5. Tumor progression
3B. Structural hardware breakage
3C. Supporting hardware breakage or wear
Super cial wound problems, including aseptic wound dehiscence and super cial necrosis
1 Report the median time (and range) from surgery to diagnosis of the complication, in months. Does not apply for type 3D (wear of liner or insert) and 3E (bone resorption) complications
2 Report the total number of patients who were a ected by the complication, also those who did not need surgical re-intervention
3 All deep infections, including those treated with implant retention