Intramedullary, antibiotic-loaded cemented, massive allografts for skeletal reconstruction 26 cases compared with 19 uncemented allografts

We compared the outcomes of 26 intramedullary cemented massive allografts with 19 allografts without cementation; all allografts were used for reconstruction after excision of bone sarcomas. In the cementation group, 12 allografts were used as osteochondral grafts (proximal humerus 4, proximal tibia 4, and distal femur 4), 7 as intercalary diaphyseal allografts of the femur, and 7 for a knee arthrodesis. In the uncemented allografts, 3 allografts were used as osteochondral grafts (proximal humerus 2, proximal tibia 1), 2 as intercalary diaphyseal allograft of the femur, and 14 for a knee arthrodesis. The average length of follow-up was 40 (25-60) months. 14 of 26 cemented allografts had an excellent (osteotomy line: not visible) or good (fusion 75% of the cortical thickness) healing of the junction site. Infection developed in 1 allograft. Fracture occurred in 4 of 12 cemented osteochondral allografts due to a subchondral collapse (all in the proximal tibia). Fractures at the junction site in the lower extremity developed in 4 of 22 cemented allografts. In 19 allografts without cementation, 11 had excellent or good healing of the junction. Late infection developed in 4 allografts, fracture of the allograft in 3 cases, and junction fracture in 3 of 17 patients with reconstruction of the lower extremity. Intramedullary graft cementation seems to reduce the fracture and infection rates.     

KMFTR (Kotz Modular Femur Tibia Reconstruction System) modular tumor endoprosthesis system for the lower extremity]

206 patients with tumorendoprosteses of the KMFTR-type at the lower extremity were operated at the Institute Rizolli Bologna and at the University Clinic of Vienna. The minimum follow up was 2 years (mean 3.2, max. 8 years). In order to bridge the defect caused by tumor resection the proximal femur was replaced in 42 cases, the distal femur in 119 cases and in 6 patients a total femur prosthesis was used. The proximal tibia was replaced in 35 cases and in 4 cases a total knee prosthesis was implanted. Clinical evaluation according to Enneking revealed 71.6% excellent and good results. In 83.4% the radiological score was higher then 20. We saw deep infections in 8.2% (17 patients), breakage of the prosthesis in 6.8% and aseptic loosening in 5.8%. 3 patients had to be amputated due to infection. In the remaining cases of infection in 66% of the patients healing was observed. All cases of aseptic loosening or breakage could be revised successfully by an exchange of the prostheses and therefore salvage of the leg was achieved.     

The role of vascularized fibula in skeletal reconstruction

Since March 1988, 144 oncologic bone resections have been surgically treated with vascularized fibula (VF). In 30 patients VF was used after the failure of previous reconstructions, while in 114 cases (79%) VF immediately followed tumor resection. In 14 cases VF was pedicled on its vessel and used to reconstruct the ipsilateral tibia. In 17 young children, the proximal fibula was used to reconstruct with a potential growth the proximal humerus, the distal radius or the proximal femur. In 103 cases VF was combined with bone allografts. In 70 of these the fibula was inserted inside the massive allograft as a viable rod. There were 7 mechanical failures, 9 deep infections, and 10 local recurrences. According to functional evaluation, 69 patients (48%) presented with excellent functional results, 39 patients (27%) had good results while fair of poor results were recorded in 36 cases (25%).     

Allografts about the Knee in Young Patients with High-Grade Sarcoma

Reconstruction after resections for high-grade sarcomas about the knee in children and adolescents is a challenging problem because of the large soft tissue and skeletal defects, the effects of adjuvant therapy, and the potential for long-term use of the limb. One hundred sixteen patients, all 18 years or younger, with osteosarcoma or Ewing's sarcoma located between the middle femur and middle tibia, were treated with chemotherapy, resection, and allograft reconstruction. One hundred three patients with osteosarcoma and 13 patients with Ewing's sarcoma had 105 Stage II and 11 Stage III tumors. There were 72 osteoarticular grafts (39 femur, 33 tibia), 28 intercalary grafts (19 femur), seven allograft-prosthetic composites (all femur,) and nine allograft-arthrodeses (seven femur, two tibia). At latest followup, 49% of all of the allograft reconstructions were rated good or excellent, 14% were rated as fair, and 37% were failures. Sixteen percent had an infection develop. Twenty-seven percent of patients had a fracture, 34% had a nonunion, and 14 patients eventually required amputation. Reconstruction of large bone defects about the knee in young patients who are being treated with chemotherapy is difficult. Although complications significantly affect outcome, allografts are a viable option for reconstruction in children with high-grade sarcomas about the knee.     

A modular femur-tibia reconstruction system

A 26 piece modular system for the reconstruction of the bones of the lower extremity from the femoral head to the distal third of the tibia is described. This modular system can be implanted without cement and allows for the intraoperative determination of the amount of resection necessary. The implant material is the well-known cast, Co-Cr-Mo alloy Vitallium. From 1982 to the end of 1985, 52 patients were treated with this cementless tumor endoprosthesis of the Kotz Modular Femur-Tibia Reconstruction System (KMFTR) at the University of Vienna, Department of Orthopedics. The locations of the tumors were: proximal femur (28), distal femur (17), and proximal tibia (7). In two cases a total femur was implanted and in another patient a total knee. Indications for the resection of the bone segments and joints concerned included primary bone tumors, metastases, and loosening of conventional endoprostheses and tumor resection endoprostheses. Twenty-one patients with an average follow up of 20.4 months and a minimum follow up of 1 year were evaluated according to Enneking's criteria. Eight patients had proximal femoral replacement. The results were excellent in two, good in five, and fair in one. Eleven patients had undergone replacement surgery in the knee joint area. The overall rating showed five excellent results, four good and two fair. One patient with a total femoral replacement had multiple bone metastases with polytopic pain and was no longer available for regular assessment. Another patient with a total knee replacement suffered a rupture of the patellar ligament after 10 months and had to be revised. Radiologically we have observed excellent bone incorporation of the prosthesis in 15 of 25 evaluated patients. Ten cases showed no changes in radiologic features as compared to the initial findings. These were patients with short follow up periods. Although complications did occur in these major surgical interventions, the final results were very satisfactory and the patients were subjectively content with the operation.     

股骨上段肿瘤切除后人工假体重建的临床研究

目的探讨肿瘤广泛切除后人工假体置换治疗股骨上段恶性肿瘤的疗效,总结并发症发生情况。方法1998年7月至2005年7月,对81例股骨上段骨肿瘤的患者行广泛切除后人工假体置换,肿瘤类型包括股骨近端转移癌30例,股骨近端原发恶性骨肿瘤39例,股骨上段周围原发恶性软组织肿瘤4例,股骨上段纤维异常增殖症3例,其他5例。9例患者使用了灭活肿瘤骨结合人工假体复合重建缺损,5例患者行异体骨人工关节复合体重建,其余67例患者均使用金属假体。术后功能评价采用MSTS93评分。结果30例骨转移癌患者中,因术后均转往相关肿瘤科室行放、化疗,随访率较低,局部复发率不详,但术后短期关节功能良好。76例（93．8％）患者术后半年MSTS93评分平均在25分以上。51例原发肿瘤患者术后随访1．5～7．0年,平均3．5年。1例患者出现髋脱位;2例患者出现假体迟发感染;2例患者出现假体松动;2例患者发生移植物与宿主骨接合处不愈合;2例患者出现髋臼磨损;3例患者出现髋部疼痛,行走困难;1例患者出现假体的下沉。5例患者在术后0．5～2．0年内发生了局部复发。结论股骨上段恶性骨肿瘤切除后应用人工假体重建骨缺损,并发症较少,可以早期进行康复训练,术后髋关节功能良好,可作为股骨上段恶性骨肿瘤切除后的首选重建方法。     

Total endoprosthetic management of the hip joint after failed osteosynthesis of para-articular hip fracture

OBJECTIVE: Treatment of fractures of the proximal femur by open reduction and internal fixation is prone to complications and frequently requiring secondary joint replacement. The aim of the present study was to examine the results of total hip arthroplasty as a salvage procedure for failed internal fixation of femoral or acetabular fractures. PATIENTS AND METHODS: We retrospectively studied 145 patients who had undergone 146 total hip arthroplasties for failed internal fixation of femoral (n = 135) or acetabular fractures (n = 11). Mean follow-up time after insertion of the hip endoprosthesis was 7.1 years (1.5-14.7 years). Patient evaluation included a history, clinical examination, and standard radiographs. RESULTS: Twenty-eight patients had died, and 18 patients were lost to follow-up. Kaplan-Meier analysis with revision of the implants as the end-point demonstrated 85 percent survival after ten years. Using the Merle d'Aubigné rating system, we found good or excellent results in 85 percent of the cases. However, only 73.9 percent of the patients were satisfied with their result, and 40.9 percent still showed a positive Trendelenburg gait at follow-up. The perioperative mortality was 2.7 percent. Surgery-related femoral fractures or fissures were observed in 18 cases, and deep infections in four. CONCLUSIONS: In comparison with data of patients who had undergone primary total hip arthroplasty for osteoarthritis in our department, the results reported here after secondary hip replacement are clearly inferior. Nonetheless, alloarthroplasty of the hip still is the most effective procedure after failed internal fixation for acetabular or proximal femoral fractures.     

Reconstruction of hip stability after proximal and total femur resections

Dislocation is the most common complication after proximal and total femur endoprosthetic reconstruction. The current study describes a surgical technique of acetabular preservation and reconstruction of the joint capsule and abductor mechanism that recreates joint stability and avoids dislocation. Between 1980 and 1996, 57 patients underwent proximal or total femur resection with endoprosthetic reconstruction. Forty-six patients had primary sarcoma of bone, nine had other bone tumors, and two had metabolic bone disease. The acetabulum was spared and not resurfaced in all patients. Bipolar hemiarthroplasty was performed in 49 patients, and fixed unipolar hemiarthroplasty was performed in eight. Soft tissue reconstruction included Dacron tape capsulorrhaphy over the prosthetic neck, reattachment of the abductor mechanism to the prosthesis, and extracortical bone fixation. The average followup period was 6.5 years (range, 2-18.2 years). Dislocation occurred in only one (1.7%) patient, and aseptic prosthetic loosening occurred in three (5.3%) patients. Four patients with primary bone sarcoma had local recurrence, of whom one required amputation of the limb. The limb salvage rate was 98%. Eighty-one percent of the patients had a good to excellent functional outcome. Acetabular preservation, capsulorrhaphy, and reconstruction of the abductor mechanism recreate hip stability and avoid dislocation after proximal and total femur endoprosthetic reconstruction.     

Gastric adenocarcinoma. A disease in transition

Two hundred eleven gastric adenocarcinomas diagnosed from 1967 to 1982 were analyzed. Thirty-four percent had a proximal location, a proportionate increase from previous decades that suggested a distinctive epidemiology. Diffuse histology occurred in 49% of cases overall and in 55% of unresectable cases, which were also increases from previous decades. No deaths followed curative resections, two (4%) of 50 patients with palliative resections died, and three (6%) of 54 patients who underwent exploration without resection died, indicating improved operative management. Superficial gastric cancer constituted 6% of cases; 91% were cured. Seventeen percent of cases were linitis plastica and required total gastrectomy in 77% of resections; only 13% of patients had curative operations; none were cured. Seventy-nine percent of cases were polypoid or ulcerated focal cancers. Of operable focal cancers, 72% were resected; 27 (47%) of 57 patients who underwent resection for cure survived five years, a distinct improvement from previous reports, as was the overall survival of 21%.     

股骨近端外侧加压型锁定板治疗转子间不稳定性四部分骨折

目的评价股骨近端外侧加压型锁定板治疗转子间不稳定性四部分骨折的临床疗效。方法对我科自2005年7月至2010年5月收治的53例股骨转子间不稳定性四部分骨折患者进行回顾性分析。全部患者均采用股骨近端外侧加压型锁定板固定,运用颈干角、尖顶距等影像学测量指标和髋关节Harris评分评价其治疗效果。结果 52例患者获得平均9.1个月的随访,均获得骨折愈合。复位好的49例,可以接受的复位2例,复位差的1例。术后颈干角为93°～138°,平均129°;尖顶距〈25mm的47例,尖顶距≥25mm的5例。术后并发症包括髋内翻2例,损伤性骨化1例,大腿痛2例。按Harris评分标准,优29例,良19例,可3例,差1例,优良率为92.3%。结论股骨近端加压型锁定板具有符合股骨近端解剖形态、固定牢固、可抗旋转、手术灵活安全、手术时间短、失血量少及对股骨头血供干扰小等优点,是一种较好的固定转子间不稳定性四部分骨折的内置物。     

Therapy of bone metastases of the lower extremity with the KMFTR modular tumor endoprosthesis system]

During the years 1975 through 1989, 189 patients have been operated because of metastases within bones of the lower extremity. Thereof, 34 patients received an endoprosthesis of the KMFTR (Kotz Modular Femur-Tibia reconstruction system) type. In detail, the following reconstruction elements had been used: proximal femur (n = 20), distal femur (n = 7), complete femur (n = 2), proximal tibia (n = 5). At the time of follow-up examination 30 patients had died. Mean survival time after resection of metastases was 18.6 months (range 8-44 months). According to histologic judgement, in 23 cases wide or marginal resections had been performed whereas 11 patients had been operated intralesionally. In no case local recurrence as relevant to therapy was observed. At the same time-point, survival periods after detection of secondary manifestations of the malignant diseases within the remaining 4 patients were 29, 61, 73 and 125 months, respectively. The following complications were observed: luxation of the prosthesis (n = 6), transient paresis of the peroneus (n = 3), deep vein thrombosis (n = 2), pulmonary infarction (n = 1), wound healing disturbances (n = 2) and hematoma (n = 3).     

股骨近端骨肿瘤切除后特制人工假体置换

目的探讨股骨近端骨肿瘤切除后特制人工假体置换疗效。方法18例股骨近端骨肿瘤均采用瘤段切除、特制人工假体置换。结果18例均安全度过围手术期,4例于术后1年左右死亡。生存的14例关节获平均2年9个月随访,按Enneking肢体肌肉骨骼肿瘤外科治疗重建术后功能评估标准进行评估：4-5分10例,3分3例,1分1例。结论根据股骨近端肿瘤类型采用合理的肿瘤边缘完整切除手术,选择适当假体和治疗方式,能有效重建髋关节功能并达到保肢目的。     

The noncemented porous-coated hip prosthesis. A three-year clinical follow-up study and roentgenographic analysis

This was a retrospective study reviewing 68 hip arthroplasties performed with noncemented, porous-coated components at three institutions in the period between December 1983 and June 1987. Fifty of these were available for follow-up study. The mean follow-up period was three years (range, 18-56 months). Thirty-seven patients were treated by total hip arthroplasty (THA) with porous-coated components, and thirteen were implanted with porous-coated femoral stems with bipolar endoprostheses using a porous-coated femoral stem and a universal head. The mean Harris hip score at follow-up evaluation for the entire group was 85.7 points. Eighty percent of the patients had either a good or excellent result. Those patients implanted with a porous femoral stem with bipolar acetabular components had only 54% good or excellent results compared with 90% good or excellent results for those having THA. Roentgenographic findings included a 59% rate of femoral neck cortex osteopenia, an 80% rate of medial or lateral distal cortical hypertrophy, and an 80% rate of distal bone bridging. All of these roentgenographic changes were secondary to changes in stress transference to the proximal femur. There was no correlation between thigh pain or the degree of bone-prosthesis radiolucencies and the fit of the femoral stem.     

Bone and muscle mass after hip rearthroplasty: Controlled CT study of 12 patients

The cortical bone mineral density (BMD), bone volume, bone mass and muscle volume of the thigh and the cancellous BMD of the distal femur and proximal tibia were quantified by computed tomography (QCT) in 12 patients after hip rearthroplasty due to prosthetic loosening following arthroplasty for arthrosis. Both legs were scanned and the operated side was compared with the healthy side. A control group, 12 patients, had had unilateral hip arthroplasty without subsequent rearthroplasty. There was a 19 percent decrease in bone mass and 13 percent decrease in muscle volume in the middle femur, compared to the contralateral side, in the patients who had undergone rearthroplasty, and a reduction of 9 percent for the same variables in the control group. There was also a more marked osteopenia in the reoperated extremity in the distal femur and proximal tibia compared to the unoperated side     

股骨近端解剖型钢板治疗股骨粗隆间骨折

目的探讨股骨近端解剖型钢板治疗股骨粗隆间骨折的临床疗效。方法自2000年1月至2005年1月，采用切开复位，股骨近端解剖型钢板治疗股骨粗隆间骨折36例，根据术前、术后X线片及术后髋关节功能恢复情况评价内固定效果。结果术后随访6个月～3年，平均18个月，所有病例均在术后3～5．5个月获得骨性愈合，髋关节功能根据Harris评分标准进行评定，优32例，良4例。结论股骨近端解剖型钢板适用于治疗大多数类型的股骨粗隆间骨折，能达到良好的骨折复位和坚强的固定，促进关节早期功能锻炼，骨折愈合率高，是治疗股骨粗隆间骨折的理想选择。     

Non-ossifying fibromas: Case series,including in uncommon upper extremity sites

AIM To investigate non-ossifying fibromas(NOFs) common fibrous bone lesions in children that occur in bones of the lower extremities.METHODS We analyzed 44 cases of NOF including 47 lesions, which were referred with a working diagnosis of neoplastic lesions. Lesions were located in the upper extremities(1 proximal humerus, 1 distal radius) and the lower extremities(25 distal femurs, 12 proximal and 4 distal tibias, and 4 proximal fibulas).RESULTS Three cases had NOFs in multiple anatomical locations(femur and fibula in 1 case, femur and tibia in 2 cases). Overall, larger lesions 4 cm and lesion expansion at the cortex were seen in 21% and 32% of cases, respectively. Multiple lesions with bilateral symmetry in the lower extremities suggest that these NOFs were developmental bone defects. Two patients suffered from fracture and were treated without surgery, one in the radius and one in the femur. Lesions in the upper extremities(i.e., humerus of a 4-year-old female and radius of a 9-year-old male) expanded at the cortex and lesion size increased with slow ossification.CONCLUSION NOFs in the lower extremity had fewer clinical problems, regardless of their size and expansiveness. In these two upper extremity cases, the NOFs had aggressive biological features. It seems that there is a site specific difference, especially between the upper extremity and the lower extremity. Furthermore, NOFs in the radius are predisposed to fracture because of the slender structure of the radius and the susceptibility to stress.     

Re-implantation of autoclaved bone segments in musculoskeletal tumor surgery

Nine patients who had malignant bone tumors of the lower extremity were managed with wide en bloc resection and re-implantation of the extracorporally autoclaved specimens. The segments were fixed by plate osteosynthesis, knee arthrodesis rod, or intramedullary nails. In one patient the complete femur was re-implanted. After a mean follow-up of 66 months (range 13–101 months), 8 out of 9 patients were still free of disease. One patient with Ewing’s sarcoma and re-implantation of the complete femur died of systemic recurrence. No local recurrence was seen. One patient with Ewing’s sarcoma of the tibia who had undergone postoperative irradiation developed a local infection 18 months postoperatively which finally had to be treated by knee disarticulation. After an average duration of 13 months, all graft-host junctions had healed. The functional result of the patient with the knee disarticulation was poor. In all other patients, the functional outcome was good or excellent. The evaluation of 115 patients (106 from the literature, 9 from our study) with a mean follow-up of 63 months showed 8 local recurrences. There were 4 secondary infections and only 1 primary infection. In tumors of the extremities and the pelvis, the functional outcome was excellent or good in about 80%. Limb salvage using re-implantation of autoclaved tumor-bearing bone segments for reconstruction has a low complication rate and good functional results in appropriately selected patients compared with other options of management. Received: 29 December 1997     

外科治疗肢体骨巨细胞瘤43例

目的探讨外科手术治疗肢体骨巨细胞瘤（giant cell tumor of bone, GCT）的临床疗效。方法回顾性分析2007年1月至2013年7月于我院应用外科手术方法治疗的43例GCT患者,年龄20~66岁（平均32岁）;发病部位：股骨远端17例,胫骨近端16例,桡骨远端5例,腓骨近端2例,股骨近端2例,肱骨近端1例;治疗方法：病灶扩大刮除骨水泥填充并（或不并）内固定及并（或不并）植骨术,瘤段骨切除特制肿瘤关节置换术,瘤段骨切除腓骨小头移植术,瘤段骨切除关节融合术,瘤段骨切除稳定结构重建术。分析本组患者的手术相关资料、术后恢复情况及复发率。结果43例患者均获得随访,随访时间8~64个月,平均28个月。本组患者的总复发率为7.0%（3/43）,其中采用扩大刮除术患者复发率为7.7%（2/26）,瘤段切除术患者的复发率为5.9%（1/17）,复发患者均经二次手术治疗。2例合并感染,发生率为4.7%。结论通过术前认真设计,选择恰当的手术方式和重建方式,肢体GCT可获得良好的治疗效果。     

Metastatic instability at the proximal end of the femur

A retrospective study was performed of the surgical treatment of metastatic lesions of the proximal femur in 50 patients. In 25 consecutive cases a megaprosthesis was implanted; compound plate osteosynthesis was performed in another 25 consecutive patients. Indications for surgical treatment were pathological fractures or, for prophylactic treatment, lesions of the femoral cortex exceeding 2.5 cm in diameter or affecting half the diameter of the bone or more. In all patients capable of walking preoperatively mobility was regained. Immediate full weight-bearing stability was obtained in all patients. Group analysis showed that the functional rating of the hip joint was unchanged, i.e., good or excellent, in all patients with compound osteosynthesis, compared to only 68% in the endoprosthesis group. Pain relief was excellent or good in 84% and 88% respectively. Dislocation of the tumor prosthesis occurred in 3 patients. Closed reduction was possible in 2 cases. Local recurrence was higher in the patients undergoing plate osteosynthesis, as was the frequency of tumor-related implant failure. Postoperative survival averaged 14.7 months and 12.1 months respectively.     

Endoprosthetic reconstruction for large extremity soft-tissue sarcoma with juxta-articular bone involvement: functional and survival outcome

Background

Large extracompartmental limb soft-tissue sarcoma with juxta-articular bone involvement poses major challenges in disease management. Radical resection of sarcoma frequently requires concomitant bone resection and reconstruction. We describe the clinical outcomes of endoprosthetic reconstruction and the complications associated with this procedure.

Methods

Thirty patients with soft-tissue sarcomas with local juxta-articular bone involvement in an extremity underwent surgery at our center between May 2004 and October 2011, 20 for primary sarcomas and 10 for local recurrences. Clinical data from those patients were analyzed retrospectively. The bone affected included the proximal femur (10 cases), the distal femur (nine cases), the proximal humerus (eight cases), the proximal tibia (two cases), or the total femur (one case). Wide excision of the tumor and the bone tissue involved was performed on every patient, followed by reconstruction of the subsequent defect using tumor endoprosthesis. All patients underwent regular follow-up for an average of 25 (range, 3–84) mo.

Results

Three patients had poor wound healing. Implant fractures leading to additional revisions occurred in two cases. Local tumor recurrence developed in four patients. There were 15 patients with lung metastases, and 11 patients died of disseminated metastases. In the latest follow-up, 14 patients survived free of disease and five were alive with tumors. The mean Musculoskeletal Tumor Society functional analysis for proximal femur, distal femur, proximal tibia, proximal humerus, and total femur were 90%, 82%, 73%, 71%, and 60%, respectively. The 2- and 5- y survival rates were 61.6% and 30.0%, respectively.

Conclusions

Endoprosthetic reconstruction could yield satisfactory results as a wide excision and limb salvage therapeutic strategy for patients with large extracompartmental soft-tissue sarcomas with juxta-articular bone involvement. Acceptable complications occurred in the present report.