Internal hemipelvectomy: A single institution's learning curve and longitudinal experience.

BACKGROUND AND OBJECTIVES: Wide margin resection for pelvic tumors via internal hemipelvectomy is among the most technically challenging procedures in orthopedic oncology. As such, surgeon experience and technique invariably affect patient outcomes. The aim of this clinical study was to assess how an individual surgeon's experiences and advancements in technology and techniques in the treatment of internal hemipelvectomy have impacted patient outcomes at our institution. METHODS: This study retrospectively examined a single tertiary academic institution's consecutive longitudinal experience with internal hemipelvectomy for primary sarcoma or pelvic metastases over a 26-year period between the years 1994 and 2020. Outcomes were assessed using two separate techniques. The first stratified patients into cohorts based on the date of surgery with three distinct "eras" ("early," "middle," and "modern"), which reflect the implementation of new techniques, including three-dimensional (3D) computer navigation and cutting guide technology into our clinical practice. The second method of cohort selection grouped patients based on each surgeon's case experience with internal hemipelvectomy ("inexperienced," "developing," and "experienced"). Primary endpoints included margin status, complication profiles, and long-term oncologic outcomes. Whole group multivariate analysis was used to evaluate variables predicting blood loss, operative time, tumor-free survival, and mortality. RESULTS: A total of 72 patients who underwent internal hemipelvectomy were identified. Of these patients, 24 had surgery between 1994 and 2007 (early), 28 between 2007 and 2015 (middle), and 20 between 2016 and 2020 (modern). Twenty-eight patients had surgery while the surgeon was still inexperienced, 24 while developing, and 20 when experienced. Evaluation by era demonstrated that a greater proportion of patients were indicated for surgery for oligometastatic disease in the modern era (0% vs. 14.3% vs. 35%, p = 0.022). Fewer modern cases utilized freehand resection (100% vs. 75% vs. 55%, p = 0.012), while instead opting for more frequent utilization of computer navigation (0% vs. 25% vs. 20%, p = 0.012), and customized 3D-printed cutting guides (0% vs. 0% vs. 25%, p = 0.002). Similarly, there was a decline in the rate of massive blood loss observed (72.2% vs. 30.8% vs. 35%, p = 0.016), and interdisciplinary collaboration with a general surgeon for pelvic dissection became more common (4.2% vs. 32.1% vs. 85%, p < 0.001). Local recurrence was less prevalent in patients treated in middle and modern eras (50% vs. 15.4% vs. 25%, p = 0.045). When stratifying by case experience, surgeries performed by experienced surgeons were less frequently complicated by massive blood loss (66.7% vs. 40% vs. 20%, p = 0.007) and more often involved a general surgeon for pelvic dissection (17.9% vs. 37.5% vs. 65%, p = 0.004). Whole group multivariate analysis demonstrated that the use of patient-specific instrumentation (PSI) predicted lower intraoperative blood loss (p = 0.040). However, surgeon experience had no significant effect on operative time (p = 0.125), tumor-free survival (p = 0.501), or overall patient survival (p = 0.735). CONCLUSION: While our institution continues to utilize neoadjuvant and adjuvant therapies following current guideline-based care, we have noticed changing trends from early to modern periods. With the advent of new technologies, we have seen a decline in freehand resections for hemipelvectomy procedures, and a transition to utilizing more 3D navigation and customized 3D cutting guides. Furthermore, we have employed the use of an interdisciplinary team approach more regularly for these complicated cases. Although our results do not demonstrate a significant change in perioperative outcomes over the years, our institution's willingness to treat more complex cases likely obscures the benefits of surgeon experience and recent technological advances for patient outcomes.

Factors affecting successful prosthetic use after hemipelvectomy and hip disarticulation amputations: Five-year experience from a tertiary prosthetic rehabilitation center.

BACKGROUND: Rehabilitation after hip disarticulation and hemipelvectomy amputations can be challenging, and many opt to forego prosthetic limb use. There is limited evidence on characteristics that result in successful prosthetic use; therefore, our study aimed to identify these to help guide patient expectations. METHODS: A retrospective review was performed on patients seen at a UK tertiary prosthetic center in the past 5 years with hip disarticulation or hemipelvectomy amputations. Details and etiology of amputation, length between assessment and delivery of prosthesis, goals, reasons for abandonment, and outcomes were recorded. Successful prosthetic use was defined as the use of a prosthesis at least 3 times a week. Characteristics were compared using odds ratios and Fisher exact test. RESULTS: Twenty-seven patient notes were analyzed: 42% female, 58% male, and age range 14-90. Thirty percent had a hemipelvectomy, and 70% had a hip disarticulation. Neoplasia accounted for 78% of etiologies followed by trauma 15% and infected endoprosthesis 7%. Sixty-seven percent trialed a walking prosthesis; 33% of these stopped eventually. There were no statistically significant findings of factors increasing odds of successful prosthetic use. However, age significantly increased the odds of being given a trial of a prosthesis. CONCLUSION: Although younger patients are more likely to be given the opportunity to trial a walking prosthesis, age does not seem to affect the overall outcome alone. In cases of neoplasia, there is often a delayed start to rehabilitation and prosthetic use, which may affect eventual success. Further studies are required to define the optimum characteristics for successful prosthetic use at higher amputation levels.

Midterm outcomes of total hip arthroplasty after internal hemipelvectomy and iliofemoral arthrodesis.

BACKGROUND AND OBJECTIVES: Recent studies have reported acceptable outcomes after arthrodesis takedown and conversion to total hip arthroplasty (THA); however, there are no reports on outcomes after oncologic resection, which are inherently complex and may portend poorer outcomes. The purpose of this study was to examine the surgical and functional outcomes of patients who underwent prior hemipelvectomy for tumor resection and were later converted to THA. METHODS: All patients who had prior iliofemoral arthrodesis after oncologic resection that were later converted to THA at a single institution were examined. Charts were reviewed for demographic information, operative information, functional outcomes, and complications/reoperations. RESULTS: All three patients in this study were males who underwent internal hemipelvectomies for chondrosarcoma. Patients were converted to THA at a mean of 26 years after arthrodesis. Mean follow-up after conversion to THA was 7.4 years. During this follow-up period, two of the three patients required revision surgery. At last follow-up, the mean Harris Hip Score was 81 and the mean Mayo Hip Score was 67, and all patients were ambulatory without significant pain. CONCLUSIONS: Overall, patients who undergo iliofemoral arthrodesis after oncologic hemipelvectomy and are later converted to THA can expect to have a reasonable outcome, despite a high rate of complications and revision surgery.

Healthcare Utilization Following Hemipelvectomy or Hip Disarticulation in the Military Health System.

INTRODUCTION: Amputations at the hip and pelvic level are often performed secondary to high-energy trauma or pelvic neoplasms and are frequently associated with a prolonged postoperative rehabilitation course that involves a multitude of health care providers. The purpose of this study was to examine the health care utilization of patients with hip- and pelvic-level amputations that received care in the U.S. Military Health System. MATERIALS AND METHODS: We performed a retrospective review of all patients who underwent a hip- or pelvic-level amputation in the Military Health System between 2001 and 2017. We compiled and reviewed all inpatient and outpatient encounters during three time points: (1) 3 months pre-amputation to 1 day pre-amputation, (2) the day of amputation through 12 months post-amputation, and (3) 13-24 months post-amputation. Health care utilization was defined as the average number of encounter days/admissions for each patient. Concomitant diagnoses following amputation including post-traumatic stress disorder, traumatic brain injury, anxiety, depression, and chronic pain were also recorded. RESULTS: A total of 106 individuals with hip- and pelvic-level amputations were analyzed (69 unilateral hip disarticulation, 6 bilateral hip disarticulations, 27 unilateral hemipelvectomy, 2 bilateral hemipelvectomies, and 2 patients with a hemipelvectomy and contralateral hip disarticulation). Combat trauma contributed to 61.3% (n = 65) of all amputations. During the time period of 3 months pre-amputation, patients had an average of 3.8 encounter days. Following amputation, health care utilization increased in both the year following amputation and the time period of 13-24 months post-amputation, averaging 170.8 and 77.4 encounter days, respectively. Patients with trauma-related amputations averaged more total encounter days compared to patients with disease-related amputations in the time period of 12 months following amputation (203.8 vs.106.7, P < .001) and the time period of 13-24 months post-amputation (92.0 vs. 49.0, P = .005). PTSD (P = .02) and traumatic brain injuries (P < .001) were more common following combat-related amputations. CONCLUSIONS: This study highlights the increased health care resource demand following hip- and pelvic-level amputations in a military population, particularly for those patients who sustained combat-related trauma. Additionally, patients with combat-related amputations had significantly higher rates of concomitant PTSD and traumatic brain injury. Understanding the extensive needs of this unique patient population helps inform providers and policymakers on the requirements for providing high-quality care to combat casualties.

Limb salvage in traumatic hemipelvectomy: case series with surgical management and review of the literature.

BACKGROUND: Traumatic hemipelvectomies are rare and serious injuries. The surgical management was described in several case studies, with primary amputation often performed to save the patient's life. METHODS: We report of two survivors with complete traumatic hemipelvectomy resulting in ischemia and paralyzed lower extremity. Due to modern emergency medicine and reconstructive surgery, limb salvage could be attained. Long-term outcome with quality of life was assessed one year after the initial accident. RESULTS AND CONCLUSIONS: The patients were able to mobilize themselves and live an independent life. The extremities remained without function and sensation. Urinary continence and sexual function were present and the colostomy could be relocated in both patients. Both patients support limb salvage, even having difficulties and follow-up treatments. Concomitant cases are required to consolidate the findings. LEVEL OF EVIDENCE: IV.

Application of the International Classification of Functioning principles to guide rehabilitation following hemipelvectomy in an adolescent with Li-Fraumeni syndrome: A case report.

This case report details the complex case of an adolescent patient with chondroblastic osteosarcoma in the setting of Li-Fraumeni syndrome, leading to hemipelvectomy and post-operative complications. International Classification of Functioning principles were used as a roadmap for optimization of functional restoration and transition of care coordination.

Modified hemipelvectomy techniques in dogs and cats appear well tolerated with good functional outcomes.

OBJECTIVE: To describe the clinical characteristics, procedural techniques, complications, and outcomes of dogs and cats undergoing any of the following modified hemipelvectomy techniques: concurrent partial sacrectomy and/or partial vertebrectomy, osseous excision crossing midline, and reconstruction without the use of local musculature. ANIMALS: 23 client-owned animals (20 dogs and 3 cats) that underwent modified hemipelvectomy techniques. Animals that underwent traditional (nonmodified) hemipelvectomy techniques were excluded. PROCEDURES: The medical records of 3 academic institutions were reviewed, and data were recorded and analyzed. RESULTS: Modified hemipelvectomy was performed with partial sacrectomy and/or vertebrectomy in 11 dogs, excision crossing pelvic midline with concurrent limb amputation in 5 dogs and 2 cats, and closure without use of native muscle or mesh in 4 dogs and 1 cat. Surgery was performed for tumor excision in all cases. Excision was reported as complete in 16 of 23, incomplete in 6 of 23, and not recorded in 1 of 23 animals. All animals survived to discharge. Only animals undergoing partial sacrectomy/vertebrectomy (4/11) experienced postoperative mobility concerns. Major intra- or post-operative complications (grades 3 and 4) occurred in 2 dogs that underwent partial sacrectomy/vertebrectomy, and 1 of these animals experienced a complication that resulted in death. The median time to death or last follow-up was 251 days (range, 3 to 1,642). CLINICAL RELEVANCE: The modified hemipelvectomy techniques reported in this cohort were overall well tolerated with good functional outcomes. These findings support the use of these modified hemipelvectomy techniques in dogs and cats, and previous notions regarding tolerable hemipelvectomy procedures should be reconsidered. However, additional studies with larger numbers of patients undergoing modified hemipelvectomy techniques are needed to gain more information.

Retrospective analysis of mortality and quality of life after hip disarticulation or hemipelvectomy: a report on 15 patients.

BACKGROUND: Hip disarticulation and hemipelvectomy are defined as major ablative amputations of the lower limb. Due to the small number of patients, little is known about the outcome and follow-up. AIMS: We aimed to assess (1) reasons for performed major ablative surgeries such as hip disarticulation and hemipelvectomy in a German center for trauma and orthopedic surgery. (2) In addition, mortality and quality of life after hip disarticulation and hemipelvectomy as well as (3) patient and treatment characteristics should be investigated. METHODS: During a period of twelve years, 15 patients underwent hip disarticulation or hemipelvectomy. Mortality, EQ-5D-3L quality of life by EQ-5D-3L and time-trade-off (TTO), VAS, cause of disarticulation, length of hospital stays, revisions, comorbidities, Charlson comorbidity index (CCI), and ASA score were evaluated retrospective for all patients. RESULTS: The overall mortality rates were 26.7% at 30 days, 60.0% after one year and 66.7% after three years. The five surviving patients reported about moderate problems in the EQ-5D-3L. The average VAS score reached 45 (range 15-65). The mean TTO was 9.8 (range 6-12). Indications for amputation were infection (n = 7), tumor (n = 6), trauma (n = 1) and ischemia (n = 1). CONCLUSION: Hip disarticulation and hemipelvectomy are followed by a high postoperative mortality. Quality of life of the affected patients is impaired in long-term follow-up. Especially amputations performed due to infections show high mortality within one month after surgery despite average young age and low CCI. Surgeons should be aware of this devastating outcome and extraordinary vigilant for these vulnerable patient cohorts.

Changes in psoas muscle size and ambulatory function after internal hemipelvectomy without reconstruction.

Internal hemipelvectomy without reconstruction of the pelvis is a viable treatment for pelvic sarcoma; however, the time it takes to return to excellent function is quite variable. Some patients require greater time and rehabilitation than others. To determine if psoas muscle recovery is associated with changes in ambulatory function, we retrospectively evaluated psoas muscle size and limb-length discrepancy (LLD) before and after treatment and their correlation with objective functional outcomes. T1-weighted MR images were evaluated at three intervals for 12 pelvic sarcoma patients following interval hemipelvectomy without reconstruction. Correlations between the measured changes and improvements in Timed Up and Go test (TUG) and gait speed outcomes were assessed both independently and using a stepwise multivariate regression model. Increased ipsilesional psoas muscle size from three months postoperatively to latest follow-up was positively correlated with gait speed improvement (r = 0.66). LLD at three months postoperatively was negatively correlated with both TUG (r = -0.71) and gait speed (r = -0.61). This study suggests that psoas muscle strengthening and minimizing initial LLD will achieve the greatest improvements in ambulatory function. LLD and change in hip musculature remain substantial prognostic factors for achieving the best clinical outcomes after internal hemipelvectomy. Changes in psoas size were correlated with the amount of functional improvement. Several patients in this study did not return to their preoperative ipsilateral psoas size, indicating that monitoring changes in psoas size could be a beneficial rehabilitation strategy.

What are the 2-year survivorship outcomes of custom hemipelvis reconstruction after hemipelvectomy and revision arthroplasty? The evolution of a custom ilium "monoflange".

BACKGROUND: Innovations in machined and three-dimensionally (3D) printed implant technology have allowed for customized complex pelvic reconstructions. We sought to determine the survivorship of custom hemipelvis reconstruction using ilium-only fixation at a minimum 2-year follow-up, their modes of failure, and the postoperative complications resulting from the procedure. METHODS: A retrospective review identified 12 consecutive patients treated with custom hemipelvis reconstruction. Indications for surgery were bone tumor requiring internal hemipelvectomy (four patients) or multiply revised, failed hip arthroplasty with massive bone loss (eight patients). All patients had a minimum of 2-year follow-up with a mean of 60.5 months. Kaplan-Meier survivorship analysis was determined for all patients. Postoperative complications and reoperations were categorized for all patients. RESULTS: At a mean of 60.5 months, 11 of 12 patients had retained their custom implant (92% survivorship). One implant was removed as a result of an acute periprosthetic joint infection (PJI). There were no cases of aseptic loosening. Seven of 12 patients required reoperation (three PJI; two dislocations; two superficial wound complications), with five patients going on to reoperation-free survival. CONCLUSIONS: Custom hemipelvis reconstruction utilizing an ilium monoflange provides durable short-term fixation at a minimum 2-year follow-up. Reoperation for infection and dislocation is common.

Long-term physical and psychological outcome following traumatic hemipelvectomy.

PURPOSE: First time examination of the physical and psychological long-term outcome following traumatic hemipelvectomy. METHODOLOGY: In this study, all patients suffering from traumatic hemipelvectomy that were treated in a level-A trauma center since 1988 were retrospectively evaluated. The authors aimed to compare the physical and psychological outcome following primary amputation (A) vs. limb-preservation (LP) procedures. The patients were examined with a focus on pain, function, mobility and general health. As part of this examination, various scores were recorded, i.e., Majeed Score, Time up & Go or SF-36. RESULTS: The following work showed 13 patients who had suffered a traumatic hemipelvectomy, 8 of whom survived. Five of these were available for subsequent clinical re-examination; of these, three patients underwent an amputation, while limb preservation was performed on two patients. Mean follow-up of the amputee group was after 12 years compared to 6.5 years following limb preservation. After limb preservation, both patients reported phantom limb pain at the affected leg, despite pain medication. The general state of health was assessed as 82/100 (A) and 45/100 (LP). The Majeed score was 61 (A) vs. 45 (LP). In the clinical examination, three out of five patients (2 LP, 1 A) showed peroneal palsy (PP). In the quality-of-life analysis based on the SF12/36 and the NHP, amputees scored higher than the patients who underwent limb preservation surgery. CONCLUSION: In our small patient cohort, satisfaction, pain and mobility tend to be better following primary amputation compared to limb preserving surgery.

Internal Hemipelvectomy for primary bone sarcomas using intraoperative patient specific instruments- the next step in limb salvage concept.

BACKGROUND: During pelvic Sarcoma resections, Surgeons often struggle to obtain negative margins while minimizing collateral damage and maintaining limb function. These complications are usually due to the complex anatomy of the pelvis. Here we present an accurate 3D surgical approach, including pre-operative printing of models and intraoperative patient-specific instruments (PSIs) for optimizing pelvic sarcoma resections. METHODS: This single-center retrospective study (N = 11) presents surgical, functional, and oncological outcomes of patients (average age 14.6 +/- 7.6 years, 4 males) who underwent pelvic sarcoma resections using a 3D surgical approach between 2016 and 2021. All patients were followed up for at least 24 months (mean = 38.9 +/- 30.1 months). RESULTS: Our results show promising surgical, oncological, and functional outcomes. Using a 3D approach, 90.9% had negative margins, and 63.6% did not require reconstruction surgery. The average estimated blood loss was 895.45 ± 540.12 cc, and the average surgery time was 3:38 ± 0.05 hours. Our results revealed no long-term complications. Three patients suffered from short-term complications of superficial wound infections. At 24 month follow up 72.7% of patients displayed no evidence of disease. The average Musculoskeletal Tumor Society (MSTS) score at 12 months was 22.81. CONCLUSION: 3D technology enables improved accuracy in tumor resections, allowing for less invasive procedures and tailored reconstruction surgeries, potentially leading to better outcomes in function and morbidity. We believe that this approach will enhance treatments and ease prognosis for patients diagnosed with pelvic sarcoma and will become the standard of care in the future.

Diagnosis and Management of Traumatic Hemipelvectomy.

Traumatic hemipelvectomy (THP) is a catastrophic injury associated with high-energy trauma and high mortality. THP has been defined as a complete dislocation of the hemipelvis, often with disruption through the symphysis pubis and sacroiliac joint with concurrent traumatic rupture of the iliac vessels. Despite recent advances in prehospital resuscitative techniques, the true incidence of THP is difficult to ascertain because many patients die before hospital arrival. The leading causes of death associated with THP include blood loss, infection, and multiple system organ failure. Recognition and immediate intervention for these injuries is imperative for survival. The initial assessment includes a thorough physical examination assessing for signs of arterial damage and other associated injuries. Hemorrhage control and vigorous resuscitation should be prioritized to combat impending exsanguination. Emergent amputation has been found to be a lifesaving operation in these patients. The basis of this approach is rooted in achieving complete hemostasis while reducing complication rates. Understanding the nature of these massive pelvic injuries, the role of early amputation, and the importance of subspecialty communication can improve survivability and optimize patient outcomes.

All-Internal Limb Lengthening with Simultaneous Corrective Osteotomy After Internal Hemipelvectomy: A Case Report.

CASE: A 27-year-old woman with a Grade II chondrosarcoma in the right acetabulum underwent a Type II internal hemipelvectomy with an ischiofemoral fusion. She developed a 7.0-cm functional limb-length discrepancy with adduction of the hip at rest. Four years after surgery, she underwent a corrective osteotomy and limb lengthening with a magnetic lengthening nail. Eleven years after tumor resection and a successful pregnancy, she had symmetric leg lengths and ambulated without an assistive device. CONCLUSIONS: A magnetic lengthening nail is a viable option for correcting limb-length discrepancies after hemipelvectomy. If necessary, a simultaneous corrective proximal femoral osteotomy can be performed.

Comparison of Reconstruction Techniques Following Sacroiliac Tumor Resection: A Systematic Review.

BACKGROUND: Although internal hemipelvectomies with sacroiliac resections are not traditionally reconstructed, surgeons are increasingly pursuing pelvic ring reconstruction to theoretically improve stability, function, and early ambulation. This study aims to systematically compare complications and functional and oncologic outcomes of sacroiliac resection with and without reconstruction. METHODS: PubMed and MEDLINE were queried for studies published between January 1990 and October 2020 pertaining to sacroiliac neoplasm resection with subsequent reconstruction. Patient demographics, histopathologic diagnoses, reconstruction techniques, Musculoskeletal Tumor Society (MSTS) functional scores, and oncologic outcomes were pooled. RESULTS: Twenty-three studies (201 patients) were included for analysis. Reconstruction was performed in 79.1% of patients, most commonly with nonvascularized autografts (45.8%). The overall complication rate was 54.8%; however, resection followed by reconstruction demonstrated significantly higher complication (62.3% versus 25.7%, p < 0.001) and infection rates (13.7% versus 0%, p = 0.020). Mean MSTS functional score trended higher in nonreconstructed patients (82% versus 71.6%). CONCLUSIONS: Reconstruction after sacroiliac resection produced higher complication rates and poorer physical recovery when compared with nonreconstructed resection. This systematic review suggests that patients without spinopelvic junction instability may experience superior outcomes without reconstruction. Ultimately, the need to reconstruct the pelvic girdle depends on tumor size, prognosis, and functional goals.

Tratamiento multidisciplinario de condrosarcoma gigante de fémur proximal mediante hemipelvectomía externa y reconstrucción con colgajo pediculado tipo fillet flap: presentación de un caso clínico / Multidisciplinary treatment of giant chondrosarcoma of the proximal femur by external hemipelvectomy and reconstruction with a pedunculated fillet flap: presentation of a clinical case / Tratamento multidisciplinar do condrossarcoma gigante do fêmur proximal por hemipelvectomia externa e reconstrução com retalho fillet flap: apresentação de um caso clínico

El condrosarcoma forma parte de los tumores primarios malignos más frecuentes. Las localizaciones pélvicas y de raíz de muslo requerirán abordajes amplios con la consecuente dificultad de cobertura de partes blandas. La hemipelvectomía externa es habitualmente el procedimiento de elección para estas localizaciones. Implica la resección de la extremidad inferior en bloque asociada a la hemipelvis ipsilateral, dando como resultado un gran defecto de cobertura. En algunas circunstancias, la extensa resección de partes blandas hace imposible la utilización de colgajos rotacionales locales. La reconstrucción con colgajo tipo "Fillet flaps" ofrece a estos defectos de partes blandas la opción de lograr una adecuada cobertura. El objetivo del trabajo es mostrar la resolución de un caso poco convencional de condrosarcoma de fémur proximal y su reconstrucción de partes blandas con un método nunca antes utilizado en nuestro medio.

Chondrosarcoma is one of the most frequent malignant primary tumors. Pelvic and proximal femur locations require extensive approaches with the consequent difficulty of soft tissue reconstruction. External hemipelvectomy is usually the procedure for these locations. It involves total en bloc resection of the lower extremity associated with ipsilateral hemipelvis, resulting in a large coverage defect. In some cases, local rotational flaps are impossible. Reconstruction with fillet flaps offers an adequate coverage for soft tissue defects. The objective of this study is to show the resolution of an unconventional case of chondrosarcoma of the proximal femur and its soft tissue reconstruction with a method never before used in our country.

O condrossarcoma é um dos tumores primários malignos mais frequentes. As localizações das raízes pélvicas e da coxa exigirão amplas abordagens com a conseqüente dificuldade em cobrir os tecidos moles. A hemipelvectomia externa costuma ser o procedimento de escolha para esses locais. Envolve a ressecção do membro inferior em bloco associado à hemipelve ipsilateral, resultando em um grande defeito de cobertura. Em algumas circunstâncias, a ressecção extensa de partes moles impossibilita o uso de retalhos rotacionais locais. A reconstrução com retalhos de filé oferece a esses defeitos de tecidos moles a opção de obter uma cobertura adequada. O objetivo deste trabalho é mostrar a resolução de um caso não convencional de condrossarcoma do fêmur proximal e sua reconstrução de partes moles com método nunca antes utilizado em nosso meio.

Hemipelvectomy as a Salvage Procedure in Massive Pelvic Trauma.

"Pedestrian struck by train" represents one of the highest magnitude blunt force traumas. Despite the severity of injuries, these patients can have good outcomes. A 25-year-old male presented after being struck by a train. He had several injuries, including extensive complex pelvic fractures, right external iliac artery and vein laceration, and right femur and tibia fracture. He was taken to the operating room for damage control surgery and attempted revascularization of the right lower extremity. The extremity became ischemic and required above knee amputation followed by hip disarticulation and hemipelvectomy. His pelvic wounds were treated with negative pressure wound therapy and gradually closed. He was eventually discharged to a rehab facility for continued recovery. This case highlights the interventions that allowed a young man who was struck by a train to survive. He improved significantly since undergoing hemipelvectomy, indicating that severe pelvic injuries from high energy trauma may necessitate hemipelvectomy.

External and internal hemipelvectomy: A retrospective analysis of 68 cases.

OBJECTIVES: This study aims to investigate the factors that may be associated with surgical site infection and mortality in pelvic resection surgeries. PATIENTS AND METHODS: A total of 68 patients (40 males, 28 females; mean age: 43±16.2 years; range, 11 to 70 years) who underwent internal or external hemipelvectomy between January 2010 and January 2020 were retrospectively analyzed. We reviewed data concerning histopathological diagnosis, surgical technique, pelvic resection type, tumor size, postoperative infection, duration of follow-up, and mortality. RESULTS: The mean follow-up was 45.5±42.2 months. Among 68 patients, 29 (42.6%) cases underwent external hemipelvectomy and 39 (57.4%) cases underwent internal hemipelvectomy. Reconstruction was performed in 14 (20.6%) patients who underwent internal hemipelvectomy. Of all patients, 61 had primary malignant pelvic tumors and two had metastatic pelvic tumors. Of the other five patients, two had a giant cell tumor, two had a pelvic hydatid cyst, and one had an aneurysmal bone cyst. The three most common pelvic tumors were chondrosarcoma (n=25, 36.7%), osteosarcoma (n=13, 19.1%), and Ewing sarcoma (n=8, 11.8%). Surgical site infections were observed in 34 (50.0%) patients. Of 34 patients, 15 (22.1%) had superficial infections and 19 (27.9%) had deep surgical infections. The superficial and deep infection rates were higher in the external hemipelvectomy group compared to internal hemipelvectomy (p=0.02). Patients with postoperative infection had a mean survival period of 36.0 months compared to 79.8 months in patients without infection (p=0.037). The patients treated with internal hemipelvectomy had a mean survival of 97.0 months compared to 25.7 months in patients treated with external hemipelvectomy (p<0.0001). The effect of Enneking stages of malignant pelvic tumors on survival was investigated using the Kaplan-Meier analysis. Cumulative survival decreased, as the stage progressed (p<0.0001). CONCLUSION: The type of surgical technique affects the possibility of postoperative infection. Postoperative infection, surgical method, and stage of the tumor are associated with survival.

Evaluation of a novel classification system to predict local recurrence in sarcoma patients undergoing hemipelvectomy with iliosacral resection.

AIMS: Iliosacral sarcoma resections have been shown to have high rates of local recurrence (LR) and poor overall survival. There is also no universal classification for the resection of pelvic sarcomas invading the sacrum. This study proposes a novel classification system and analyzes the survival and risk of recurrence, when using this system. METHODS: This is a retrospective analysis of 151 patients (with median follow-up in survivors of 44 months (interquartile range 12 to 77)) who underwent hemipelvectomy with iliosacral resection at a single centre between 2007 and 2019. The proposed classification differentiates the extent of iliosacral resection and defines types S1 to S6 (S1 resection medial and parallel to the sacroiliac joint, S2 resection through the ipsilateral sacral lateral mass to the neuroforamina, S3 resection through the ipsilateral neuroforamina, S4 resection through ipsilateral the spinal canal, and S5 and S6 contralateral sacral resections). Descriptive statistics and the chi-squared test were used for categorical variables, and the Kaplan-Meier survival analysis were performed. RESULTS: Resections were S1 in 25/151 patients (17%), S2 in 70/151 (46%), S3 in 33/151 (22%), S4 in 77/151 (11%), S5 in 4/151 (3%), and S6 in 2/151 (1%). An internal hemipelvectomy was performed in 113/151 patients (75%), and 38/151 patients (25%) had an external hemipelvectomy. The predominant types of sarcoma were high-grade osteosarcoma in 48/151 patients (32%), chondrosarcoma in 41/151 (27%), Ewing sarcoma in 33/151 (22%), pleomorphic sarcoma in 17/151 (11%), and others in 2/151 (8%). LR was found in 24/151 patients (15%) with S3, S5, with S6 resections showing the highest rate of LR (p = 0.038). Overall, 19/151 patients (16%) had evidence of metastastic disease at the time of surgery and these patients showed poorer survival when compared to patients with no metastasis. CONCLUSION: The proposed classification can help to report and compare different surgical and reconstructive approaches in these difficult cases who are still have a considerable risk of LR. Cite this article: Bone Joint J 2022;104-B(2):290-296.