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Risk factors for surgical site infection after malignant bone tumor resection and reconstruction

Abstract

Background

Use of an implant is one of the risk factors for surgical site infection (SSI) after malignant bone tumor resection. We developed a new technique of coating titanium implant surfaces with iodine to prevent infection. In this retrospective study, we investigated the risk factors for SSI after malignant bone tumor resection and to evaluate the efficacy of iodine-coated implants for preventing SSI.

Methods

Data from 302 patients with malignant bone tumors who underwent malignant bone tumor resection and reconstruction were reviewed. Univariate analyses were performed, followed by multivariate analysis to identify risk factors for SSI based on the treatment and clinical characteristics.

Results

The frequency of SSI was 10.9% (33/302 tumors). Pelvic bone tumor (OR: 4.8, 95% CI: 1.8–13.4) and an operative time ≥ 5 h (OR: 3.4, 95% CI: 1.2–9.6) were independent risk factors for SSI. An iodine-coated implant significantly decreased the risk of SSI (OR: 0.3, 95% CI: 0.1–0.9).

Conclusion

The present data indicate that pelvic bone tumor and long operative time are risk factors for SSI after malignant bone tumor resection and reconstruction, and that iodine coating may be a promising technique for preventing SSI.

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Background

Surgical site infection (SSI) remains one of the biggest problems associated with early failure of reconstructions with implants after bone tumor resection. Although prostheses, intramedullary nails, and plates are commonly used during reconstruction after bone tumor resection, a high infection rate after resection and reconstruction with implants has been reported [1,2,3]. Patients with deep infection require implant removal, irrigation, and prolonged antibiotic use to manage the surgical site.

Recently, we developed a new procedure for anodization of iodine-containing surfaces that could directly support existing titanium implants. In a basic research study, iodine-supported titanium showed good antibacterial activity and biocompatibility without cytotoxicity [4]. Since 2008, iodine-supported implants have been used in patients with infection or at high risk of infection [5, 6]. In bone tumor surgery, iodine-coated implants have been used in patients with a high risk of SSI. While determining the efficacy of iodine-coated implants in preventing SSI, the influence of several factors, such as preoperative chemotherapy and surgical site, should be considered. The objectives of this study were to determine risk factors associated with the development of SSI, and to investigate the efficacy of iodine-coated implants for preventing SSI after bone tumor resection.

Methods

Patients

Overall, this study included 302 patients with malignant bone tumors, who underwent tumor excision and reconstruction using plate, screw, intramedullary nail, prosthesis, and external fixation between January 1995 and July 2016. All the implants were metallic devices. There were 173 men and 129 women whose ages ranged from 4 to 92 years (mean age, 43.1 years). The diagnoses comprised of 119 metastatic tumors, 119 osteosarcomas, 26 chondrosarcomas, 19 undifferentiated pleomorphic sarcomas (malignant fibrous histiocytosis), 7 Ewing’s sarcomas, 5 adamantinomas, 3 fibrosarcomas, 1 extraskeletal myxoid chondrosarcoma, 1 malignant giant cell tumor, 1 EWSR1 rearranged sarcoma, and 1 hemangiopericytoma. Locations of the tumors included the femur (n = 184), tibia (n = 52), humerus (n = 36), pelvis (n = 24), foot (n = 3), radius (n = 2), and scapula (n = 1) (Table 1). Bone tumors located in spines were excluded from the study. In previous reports, high infection rates were reported in patients with pelvic tumor, tibial tumor, chemotherapy, radiation therapy, long operative time, or biological reconstruction [7,8,9,10]. Biological reconstruction is defined as reconstruction using bone for bony defect after resection of bone tumors. Biological reconstruction includes viable bone (iliac bone, vascularized fibula, or distraction osteogenesis), allograft, tumor-bearing autograft treated by freezing, pasteurization, autoclaving, or irradiation [11,12,13,14,15]. Basically, patients with at least one of these factors have been treated with iodine-coating implants since 2009, although only cases of elective surgery reconstructed by titanium implants can be treated with iodine-coated implants because the preparation of iodine-coated titanium implants requires 7 to 14 days. Sixty-six patients who underwent surgery with a high risk of SSI from 2009 to 2016 were treated with iodine-coated implants, including a prosthesis, plate, intramedullary nail, or external fixation. This study was approved by Medical Ethics Committee of Kanazawa University, and need for written informed consent was waived by the ethics committee.

Table 1 Characteristics of patients with uncoated and iodine-coated implants

Outcome measure

The incidence of SSI and its relationship with factors, including the use of iodine-coated implants, were assessed. The patient characteristics included age, site of the tumor (pelvis or other), tumor histology (primary or metastasis), recurrent tumor, fracture, chemotherapy, and radiation therapy to the surgical site. The surgery-related characteristics included surgical procedure (fixation only, prosthetic replacement, biological reconstruction without prosthetic replacement, and biological reconstruction with prosthetic replacement), the use of iodine-coated implants, additional surgery (surgeries for hematoma, fracture, nonunion, wound diastasis, breakage of implants, and perforation of intestine), and operative time. The optimal cutoff levels of age, operative time was identified by receiver operator characteristic (ROC) curve analysis. The use of an iodine-coated implant was defined as the use of a plate, intramedullary nail, or prosthesis with iodine coating. SSIs were defined using the US Centers for Disease Control classifications for SSIs [16].

Statistical analysis

Statistical analyses were performed as described previously [17]. To assess the association between SSI after bone tumor surgeries and each factor, univariate analysis by Fisher exact test was performed. To identify the independent risk factors for SSI, multiple logistic regression analysis was performed. Any parameter with a p-value < 0.01 on univariate analysis and use of iodine-coated implant were included in the multiple logistic regression models. P value less than 0.05 was considered as statistical significance. EZR (Saitama Medical Center, Jichi Medical University) was used for statistical analyses.

Results

Incidence of surgical site p infection

Characteristics of patients with uncoated and iodine-coated implants were shown in Table 1. Among the study patients, the incidence of SSI was 10.9% (33/302 operations). The infection rates in patients with bone tumors in the femur, tibia, humerus, and pelvis were 4.3, 25.0, 2.8, and 41.7%, respectively (Table 2).

Table 2 Locations and incidence of postoperative deep infection

Risk factors for surgical site infection

Univariate analyses revealed that pelvic tumor (odds ratio [OR] 7.8; confidence interval [CI] 2.8–21.5; p <  0.001), biological reconstruction (OR 6.8; CI 1.5–61.9; p = 0.004), composite use of biological reconstruction and prosthetic replacement (OR 6.1; CI 1.1–61.5; p = 0.019), additional surgery (OR 3.2; CI 1.3–7.4; p = 0.006), and operative time ≥ 5 h (OR 6.8; CI 2.7–19.1; p <  0.001) were significantly correlated with an increased risk of SSI (Tables 3 and 4). On the other hand, metastatic tumors and pathological fractures were correlated with a decreased risk of SSI (Table 3).

Table 3 Results of univariate analysis of the patient-related parameters
Table 4 Results of univariate analysis of the surgery-related parameters

Pelvic bone tumor, biological reconstruction, additional surgery, long operative time, and the use of an iodine-coated implant, were included in the multiple logistic regression model. Multivariate analysis revealed that pelvic bone tumor (OR 4.9; CI 1.8–13.4; p = 0.002) and an operative time (OR 3.4; CI 1.2–9.6; p = 0.022) were independent risk factors for SSI (Table 5). The use of an iodine-coated implant was significantly associated with a decreased risk of SSI (OR 0.3; CI 0.1–0.9; p = 0.039).

Table 5 Risk factors for postoperative deep infection according to multivariate analysis

Discussion

The introduction of chemotherapy has improved the survival rate of patients with malignant bone tumors. Furthermore, development of chemotherapy has also enabled good local control, with limb-sparing surgery being used in 90% of patients [18]. Limb sparing surgery comprises endoprosthesis, allograft, autograft, distraction osteogenesis, or artificial bone graft to reconstruct bone defects following tumor resection [19, 20]. Although limb sparing surgery is standard treatment for malignant bone tumors, there are problems with the long-term durability of the reconstruction, and some patients requires secondary amputation due to locally recurrent disease or SSI [19]. SSI requires irrigation surgery, the use of antibiotics for a long period, and delays in the treatment course, which increases mortality. In general surgery, biomaterial has been considered to be a risk factor for SSI [21]. Previous studies have reported that 9–28% of cases of infection occur after endoprosthetic reconstruction [1, 2, 22, 23]. In contrast, reconstruction without an implant is associated with a low infection rate (0.9–1.2%) [24,25,26]. Based on findings from previous reports, there is evidence for the use of an implant to be a strong risk factor for infection after bone tumor resection. To improve the outcomes of bone tumor surgery, new technology that prevents infection needs to be developed.

In our present study, pelvic tumor and long operative time were associated with an increased risk of infection after tumor resection and reconstruction using implants. The infection rates after resection of pelvic or tibial tumors between 15 and 43% have been reported, whereas only 4–5% of reconstructions after the resection of another part resulted in infection [7, 10, 27,28,29,30]. Therefore, the surgical site should be considered as a risk factor for SSI. The National Nosocomial Infections Surveillance (NNIS) has identified the operative time as being predictive of SSI after general surgery procedures [31]. Malignant disease has also been reported as one of the important risk factors for SSI [9]. There has been no reported significant correlation between biological reconstruction and SSI; however, high infection rate had been reported after biological reconstruction using an allograft or tumor-bearing bone graft [8]. Therefore, factors such as chemotherapy, radiation therapy, long operative time, and intraoperative blood loss, should be included in the multivariate analyses to evaluate efficacy of preventive technology. As aforementioned, several factors can be considered as risk factors of SSI.

A new preventive technique is needed to improve the outcome of bone tumor surgery in patients with risk factors for SSI. There are reports of new techniques to prevent postoperative infections that suggest, that silver coating and iodine coating can significantly prevent SSI [4, 32, 33]. This retrospective study regarding the efficacy of prophylactic coating on SSI is limited by the influence of various risk factors, including surgical site and operative time. As iodine-coated implants have been used to prevent SSI in patients with risk factors, such as chemotherapy and biological reconstruction, no significant preventive effect of an iodine-coated implant was identified by univariate analysis. However, results of multivariate analysis indicated that an iodine-coated implant significantly decreased the rate of SSI.

In the present study, there are several limitations including small number of patients with endoprosthesis, long period, and heterogenous group of tumor types, locations and reconstruction type. Basically, iodine-coated implants were used in patients with high risk of infection. In patients with malignant bone tumors, postoperative deep infection after endoprosthesis is major problem. In the present study, however, the number of patients with endoprostheses was small because tumor-bearing frozen or pasteurized bone graft using plate or intramedullary nail are popular procedure in Asian countries and performed in large part of the study patients. Furthermore, this retrospective study includes a heterogeneous patient population (tumor histology and type of implants). A prospective study with a suitable control group and a focus on tumor endoprostheses might be useful to investigate the efficacy of iodine-coated implants for reducing the incidence of deep infection after bone tumor resection. Reconstruction using endoprostheses has been thought to be a risk factor for deep infection. Iodine coating might be a promising technique for preventing postoperative deep infection in malignant bone tumor operations that call for implants as part of the reconstructions, but more study with larger numbers of patients is needed to confirm the advantages to use iodine-coated implants. In particular, future studies might focus specifically on endoprosthetic reconstructions, where the morbidity associated with infection is so very severe. If there is a lessening of infections with this technology, it may contribute to prevention of the development of multidrug-resistant bacteria resulting from long-term use of antibiotics and additional surgeries, which could reduce the cost of medical care, although future studies are needed to test this hypothesis.

Conclusions

Our data indicate that pelvic tumor and long operative time are risk factors for SSI after malignant bone tumor resection and reconstruction. Iodine coating may be a promising technique for preventing SSI, although the present study has several limitations including decision making process for implantation of iodine-coated device, study period, and heterogenous group of tumor types, locations and reconstruction type. The effect of iodine-coating should be tested in prospective study to assess the efficacy of the technique.

Abbreviations

CI:

confidence interval

EWSR1:

Ewing sarcoma breakpoint region 1

NNIS:

The National Nosocomial Infections Surveillance

OR:

odds ratio

SSI:

surgical site infection

References

  1. Bus MP, Szafranski A, Sellevold S, Goryn T, Jutte PC, Bramer JA, Fiocco M, Streitbürger A, Kotrych D, van de Sande MA, Dijkstra PD. LUMiC® endoprosthetic reconstruction after periacetabular tumor resection: short-term results. Clin Orthop Relat Res. 2017;475:686–95.

    Article  Google Scholar 

  2. Capanna R, Scoccianti G, Frenos F, Vilardi A, Beltrami G, Campanacci DA. What was the survival of megaprostheses in lower limb reconstructions after tumor resections? Clin Orthop Relat Res. 2015;473:820–30.

    Article  Google Scholar 

  3. Gaur AH, Liu T, Knapp KM, Daw NC, Rao BN, Neel MD, Rodriguez-Galindo C, Brand D, Adderson EE. Infections in children and young adults with bone malignancies undergoing limb-sparing surgery. Cancer. 2005;104:602–10.

    Article  Google Scholar 

  4. Shirai T, Shimizu T, Ohtani K, Zen Y, Takaya M, Tsuchiya H. Antibacterial iodine-supported titanium implants. Acta Biomater. 2011;7:1928–33.

    Article  CAS  Google Scholar 

  5. Hayashi H, Murakami H, Demura S, Kato S, Yoshioka K, Shinmura K, Yokogawa N, Ishii T, Fang X, Shirai T, Tsuchiya H. Surgical site infection after total en bloc spondylectomy: risk factors and the preventive new technology. Spine J. 2015;15:132–7.

    Article  Google Scholar 

  6. Tsuchiya H, Shirai T, Nishida H, Murakami H, Kabata T, Yamamoto N, Watanabe K, Nakase J. Innovative antimicrobial coating of titanium implants with iodine. J Orthop Sci. 2012;17:595–604.

    Article  CAS  Google Scholar 

  7. Angelini A, Drago G, Trovarelli G, Calabro T, Ruggieri P. Infection after surgical resection for pelvic bone tumors: an analysis of 270 patients from one institution. Clin Orthop Relat Res. 2014;472:349–59.

    Article  Google Scholar 

  8. Bus MP, Dijkstra PD, van de Sande MA, Taminiau AH, Schreuder HW, Jutte PC, van der Geest IC, Schaap GR, Bramer JA. Intercalary allograft reconstructions following resection of primary bone tumors: a nationwide multicenter study. J Bone Joint Surg Am. 2014;96:e26.

    Article  CAS  Google Scholar 

  9. Gradl G, de Witte PB, Evans BT, Hornicek F, Raskin K, Ring D. Surgical site infection in orthopaedic oncology. J Bone Joint Surg Am. 2014;96:223–30.

    Article  Google Scholar 

  10. Lozano-Calderón SA, Swaim SO, Federico A, Anderson ME, Gebhardt MC. Predictors of soft-tissue complications and deep infection in allograft reconstruction of the proximal tibia. J Surg Oncol. 2016;113:811–7.

    Article  Google Scholar 

  11. Tsuchiya H, Abdel-Wanis ME, Tomita K. Biological reconstruction after excision of juxta-articular osteosarcoma around the knee: a new classification system. Anticancer Res. 2006;26:447–53.

    PubMed  Google Scholar 

  12. Tsuchiya H, Abdel-Wanis ME, Sakurakichi K, Yamashiro T, Tomita K. Osteosarcoma around the knee. Intraepiphyseal excision and biological reconstruction with distraction osteogenesis. J Bone Joint Surg Br. 2002;84:1162–6.

    Article  CAS  Google Scholar 

  13. Campanacci DA, Totti F, Puccini S, Beltrami G, Scoccianti G, Delcroix L, Innocenti M, Capanna R. Intercalary reconstruction of femur after tumour resection: is a vascularized fibular autograft plus allograft a long-lasting solution? Bone Joint J. 2018;100-B:378–86.

    Article  CAS  Google Scholar 

  14. Song WS, Cho WH, Jeon DG, Kong CB, Duo J. Lee SY. A comparison of tumor prosthesis implantation and pasteurized autograft-prosthesis composite for proximal tibial tumor. J Orthop Sci. 2012;17:457–63.

    Article  Google Scholar 

  15. Puri A, Byregowda S, Gulia A, Patil V, Crasto S, Laskar S. Reconstructing diaphyseal tumors using radiated (50 Gy) autogenous tumor bone graft. J Surg Oncol. 2018;118:138–43.

    Article  Google Scholar 

  16. Mangram AJ, Horan TC, Pearson ML, Silver LC, Jarvis WR. Guideline for prevention of surgical site infection, 1999. Centers for disease control and prevention (CDC) hospital infection control practices advisory committee. Am J Infect Control. 1999;27:97–132.

    Article  CAS  Google Scholar 

  17. Miwa S, Shirai T, Yamamoto N, Hayashi K, Takeuchi A, Tada K, Kajino Y, Inatani H, Higuchi T, Abe K, Taniguchi Y, Tsuchiya H. Risk factors for postoperative deep infection in bone tumors. PLoS One. 2017;12:e0187438.

    Article  Google Scholar 

  18. Loh AH, Navid F, Wang C, Bahrami A, Wu J, Neel MD, Rao BN. Management of local recurrence of pediatric osteosarcoma following limb-sparing surgery. Ann Surg Oncol. 2014;21:1948–55.

    Article  Google Scholar 

  19. Jeys L, Grimer R. The long-term risks of infection and amputation with limb salvage surgery using endoprostheses. Recent Results Cancer Res. 2009;179:75–84.

    Article  Google Scholar 

  20. Tsuchiya H, Tomita K, Minematsu K, Mori Y, Asada N, Kitano S. Limb salvage using distraction osteogenesis. A classification of the technique. J Bone Joint Surg Br. 1997;79:403–11.

    Article  CAS  Google Scholar 

  21. Busscher HJ, van der Mei HC, Subbiahdoss G, Jutte PC, van den Dungen JJ, Zaat SA, Schultz MJ, Grainger DW. Biomaterial-associated infection: locating the finish line in the race for the surface. Sci Transl Med. 2012;4:153rv10.

    Article  Google Scholar 

  22. Healey JH. CORR insights™: high infection rate outcomes in long-bone tumor surgery with endoprosthetic reconstruction in adults: a systematic review. Clin Orthop Relat Res. 2013;471:2028–9.

    Article  Google Scholar 

  23. Peel T, May D, Buising K, Thursky K, Slavin M, Choong P. Infective complications following tumour endoprosthesis surgery for bone and soft tissue tumours. Eur J Surg Oncol. 2014;40:1087–94.

    Article  CAS  Google Scholar 

  24. Dierselhuis EF, Gerbers JG, Ploegmakers JJ, Stevens M, Suurmeijer AJ, Jutte PC. Local treatment with adjuvant therapy for central atypical cartilaginous tumors in the long bones: analysis of outcome and complications in one hundred and eight patients with a minimum follow-up of two years. J Bone Joint Surg Am. 2016;98:303–13.

    Article  Google Scholar 

  25. Verdegaal SH, Brouwers HF, van Zwet EW, Hogendoorn PC, Taminiau AH. Low-grade chondrosarcoma of long bones treated with intralesional curettage followed by application of phenol, ethanol, and bone-grafting. J Bone Joint Surg Am. 2012;94:1201–7.

    Article  Google Scholar 

  26. Zhen W, Yaotian H, Songjian L, Ge L, Qingliang W. Giant-cell tumour of bone. The long-term results of treatment by curettage and bone graft. J Bone Joint Surg Br. 2004;86:212–6.

    Article  CAS  Google Scholar 

  27. Farid Y, Lin PP, Lewis VO, Yasko AW. Endoprosthetic and allograft-prosthetic composite reconstruction of the proximal femur for bone neoplasms. Clin Orthop Relat Res. 2006;442:223–9.

    Article  Google Scholar 

  28. Grimer RJ, Aydin BK, Wafa H, Carter SR, Jeys L, Abudu A, Parry M. Very long-term outcomes after endoprosthetic replacement for malignant tumours of bone. Bone Joint J. 2016;98-B:857–64.

    Article  CAS  Google Scholar 

  29. Kotwal S, Moon B, Lin P, Satcher R, Lewis V. Total humeral endoprosthetic replacement following excision of malignant bone tumors. Sarcoma. 2016;2016:6318060.

    Article  Google Scholar 

  30. Ozaki T, Hillmann A, Bettin D, Wuisman P, Winkelmann W. High complication rates with pelvic allografts. Experience of 22 sarcoma resections. Acta Orthop Scand. 1996;67:333–8.

    Article  CAS  Google Scholar 

  31. National Nosocomial Infections Surveillance System. National Nosocomial Infections Surveillance (NNIS) system report, data summary from January 1992 through June 2004, issued October 2004 Am J Infect Control 2004;32:470–485.

  32. Shirai T, Tsuchiya H, Nishida H, Yamamoto N, Watanabe K, Nakase J, Terauchi R, Arai Y, Fujiwara H, Kubo T. Antimicrobial megaprostheses supported with iodine. J Biomater Appl. 2014;29:617–23.

    Article  Google Scholar 

  33. Wafa H, Grimer RJ, Reddy K, Jeys L, Abudu A, Carter SR, Tillman RM. Retrospective evaluation of the incidence of early periprosthetic infection with silver-treated endoprostheses in high-risk patients: case-control study. Bone Joint J. 2015;97-B:252–7.

    Article  CAS  Google Scholar 

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Acknowledgements

The authors wish to thank Dr. Kenichi Yoshimura, Professor of Innovative Clinical Research Center, Kanazawa University, for advice on statistical analyses.

Funding

This research received no funding support.

Availability of data and materials

The datasets supporting the conclusion of this article are included within the article. The underlying datasets are available from the corresponding author on reasonable request.

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Authors

Contributions

SM, TS, NY, and HT designed the study. SM, TS, NY, KH, AT, KT, YK, TH, KA, HA, and YT reviewed the clinical records. SM, TS, NY, and HT analyzed the data. All authors participated in the study design, data interpretation, and critical discussion. SM, TS, and HT wrote the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Toshiharu Shirai.

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The authors declare that they have no competing interests.

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This study was approved by Medical Ethics Committee of Kanazawa University. The researchers anonymized all of the data, and the need for informed consent was waived by the medical ethics committee.

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Miwa, S., Shirai, T., Yamamoto, N. et al. Risk factors for surgical site infection after malignant bone tumor resection and reconstruction. BMC Cancer 19, 33 (2019). https://0-doi-org.brum.beds.ac.uk/10.1186/s12885-019-5270-8

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