Результаты модульного эндопротезирования параацетабулярной области при опухолевом поражении вертлужной впадины и тазобедренного сустава

Introduction. surgical treatment of patients with pelvic bone tumors, in particular periacetabular tumors, remains challenging. There are many different reconstruction options after resection of these tumors. These include allo- and autografts, megaprosthesis, saddle endoprosthesis, custom-made endoprosthesis, 3D printing endoprosthesis, and femur transposition with the formation of neo-arthrosis. However, all of them are characterized by technical complexity and high risk of postoperative complications. There is still no standard procedure for reconstruction after resection of malignant periacetabular tumors. To date, modular endoprosthesis is a well-established reconstructive device in orthopaedic oncology to manage wide bone resections. Modular systems provide patient-specific endoprostheses that could be modified during surgery. In this article, we present the results of modular acetabular endoprostheses in the treatment of patients with periacetabular tumors.Material and Methods. From 2011 to 2018, 30 patients underwent modular endoprosthetic reconstruction after periacetabular resection. There were 13 (43 %) male and 17 (57 %) female patients aged from 23 to 63 years (median age 45 years). Primary malignant bone tumors were detected in 19 (63 %) patients, giant cell tumor in 5 (17 %), local soft tissue sarcoma in 1 (3 %), solitary metastases of kidney cancer in 2 (7 %) and recurrent sarcoma after previous surgical treatment in 3 (10 %) patients.Results. The average duration of surgery was 310 minutes (range: 145-520 minutes), blood loss was 5520 ml (range: 600-20000 ml). The median follow-up time was 36 months. Histological examination revealed a positive resection margin in 3 (10 %) patients. At a follow-up from 6 to 40 months, disease progression was detected in 10 (33 %) patients. Eight (27 %) patients died on disease progression. Complications of various types were diagnosed in 11 (37 %) patients. Infectious complications were the most common (30 % of patients). The average value of the functional assessment by the MSTS scale was 59 % (15-82%).Conclusion. Modular endoprosthetic replacement for tumors of the acetabulum and hip joint is a promising surgical technique allowing adequate functional results to be achieved.Введение. Хирургическое лечение больных с опухолевым поражением костей таза, в частности параацетабулярной области, является одним из наиболее сложных разделов современной онкоортопедии. Существуют различные методики реконструкции вертлужной впадины: при помощи алло- и аутографтов, мегаэндопротезов, седловидных эндопротезов, индивидуальных эндопротезов, 3Б-принтинга и транспозиции бедренной кости с формированием неоартроза. Однако все они характеризуются технической сложностью выполнения, достаточным риском развития послеоперационных осложнений. Вследствие этого универсальной методики, удовлетворяющей всем поставленным задачам, не существует. Одним из наиболее современных методов реконструкции костей таза является использование модульных эндопротезов на основе конической ножки, преимуществом которых является возможность интра-операционно смоделировать эндопротез, наиболее полно удовлетворяющий конкретной клинической ситуации. В статье представлены результаты использования модульных эндопротезов вертлужной впадины при лечении пациентов с опухолевым поражением параацетабулярной области.Материал и методы. В период с 2011 по 2018 г хирургическое лечение в объеме параацетабулярной резекции с реконструкцией модульным эндопротезом выполнено 30 больным, из них мужчин - 13 (43 %), женщин - 17 (57 %). Средний возраст - 45 лет (23-63 года). Первичные злокачественные опухоли костей были у 19 (63 %) больных, гигантоклеточная опухоль - у 5 (17 %), местнораспространенная саркома мягких тканей - у 1 (3 %), солитарные метастазы рака почки - у 2 (7 %), рецидивы сарком хирургического лечения - у 3 (10 %) пациентов. Результаты. Средняя продолжительность операции - 310 мин (145-520 мин), средний объем интраоперационной кровопотери - 5 520 мл (600-20 000 мл). Положительный край резекции по результатам планового морфологического исследования выявлен у 3 (10 %) больных. Средний срок наблюдения составил 36 мес (4-73 мес). Прогрессирование в сроки от 6 до 40 мес выявлено у 10 (33 %) больных, из них умерло 8 (27 %) пациентов. Осложнения разного типа диагностированы у 11 (37 %) больных, среди которых преобладали инфекционные процессы - 9 (30 %). Среднее значение функционального результата по шкале MSTS составило 59 % (15-82 %).Заключение. Применение модульных систем эндопротезирования вертлужной впадины и тазобедренного сустава при опухолевом поражении является перспективной хирургической методикой, позволяющей добиться адекватных функциональных результатов при сравнимом количестве послеоперационных осложнений

SURGICAL COMPLICATIONS AFTER MODULAR ENDOPROSTHETICS IN PATIENTS WITH ACETABULAR TUMOR

There are various methods of restoring the integrity of the pelvic ring, after surgery in patients with tumor lesions of the pelvic bones, allowing to keep the limb with good oncological and functional results. A new stage in the development of organ conservation treatment in this group of patients is the use of modular endoprostheses based on the conical leg. The development of postoperative complications leads to an unsatisfactory result of treatment, despite the radical surgery and technically correct endoprosthesis. This, in turn, leads to repeated surgical interventions, namely to remove metal structures, or to perform a crippling operation.Purpose. To analyze postoperative complications and methods of their treatment in patients after modular endoprosthesis replacement of the acetabulum.Patients and methods. From 2011 to 2018, surgical treatment of endoprosthesis using modular metal structures based on a conical leg was performed in 30 patients. There were 13 men (43%) and 17 women (57%). The median age was 45 years (23–63 years). Primary malignant tumors of pelvic bones were in 19 (63%) patients, 5 (17%) had a giant cell tumor. Two (7%) patients had solitary metastases of kidney cancer and one (3%) with synovial sarcoma, and 3 (7%) had relapses after previous surgical treatment.Results. The average follow-up period was 36 months. Progression of the disease in terms of 6 to 40 months was revealed in 10 patients (33%), 8 (27%) of which died, the remaining 22 (67%) are alive with no signs of progression. In the postoperative period, 11 (37%) patients developed complications with predominance (up to 30%) of infectious. The average functional result on the MSTS scale was 59%.Conclusion. The use of modular prostheses on the basis of a conical leg in patients with tumors of the pelvic bones allow to perform safe operations with a satisfactory functional and oncological result. The result obtained in our study is comparable with the data of world literature

Results of modular endoprosthetic reconstruction of periacetabular bone defects in patients with tumors of the acetabulum and hip joint

Introduction. surgical treatment of patients with pelvic bone tumors, in particular periacetabular tumors, remains challenging. There are many different reconstruction options after resection of these tumors. These include allo- and autografts, megaprosthesis, saddle endoprosthesis, custom-made endoprosthesis, 3D printing endoprosthesis, and femur transposition with the formation of neo-arthrosis. However, all of them are characterized by technical complexity and high risk of postoperative complications. There is still no standard procedure for reconstruction after resection of malignant periacetabular tumors. To date, modular endoprosthesis is a well-established reconstructive device in orthopaedic oncology to manage wide bone resections. Modular systems provide patient-specific endoprostheses that could be modified during surgery. In this article, we present the results of modular acetabular endoprostheses in the treatment of patients with periacetabular tumors.Material and Methods. From 2011 to 2018, 30 patients underwent modular endoprosthetic reconstruction after periacetabular resection. There were 13 (43 %) male and 17 (57 %) female patients aged from 23 to 63 years (median age 45 years). Primary malignant bone tumors were detected in 19 (63 %) patients, giant cell tumor in 5 (17 %), local soft tissue sarcoma in 1 (3 %), solitary metastases of kidney cancer in 2 (7 %) and recurrent sarcoma after previous surgical treatment in 3 (10 %) patients.Results. The average duration of surgery was 310 minutes (range: 145-520 minutes), blood loss was 5520 ml (range: 600-20000 ml). The median follow-up time was 36 months. Histological examination revealed a positive resection margin in 3 (10 %) patients. At a follow-up from 6 to 40 months, disease progression was detected in 10 (33 %) patients. Eight (27 %) patients died on disease progression. Complications of various types were diagnosed in 11 (37 %) patients. Infectious complications were the most common (30 % of patients). The average value of the functional assessment by the MSTS scale was 59 % (15-82%).Conclusion. Modular endoprosthetic replacement for tumors of the acetabulum and hip joint is a promising surgical technique allowing adequate functional results to be achieved

THE RESULTS OF MODULAR ENDOPROSTHESIS OF PERIACETABULAR REGION IN TUMOR LESIONS OF THE ACETABULUM AND HIP JOINT

Surgical treatment of patients with tumoral defeat of pelvic bones, of preacetabular region, in particular, is one of the most challenging topics of modern oncorthopedics. Currently, one of the most modern methods of reconstruction of the pelvic bones is the use of modular endoprostheses based on the conical leg, the advantage of which is the ability to intraoperatively simulate an endoprosthesis that best meets the specific clinical situation. Purpose of research. To assess the benefits of modular endoprosthesis of the acetabulum in patients with tumoral defeat periacetabular region.Patients and methods. Within the period of 2011–2018 30 patients underwent surgical treatment in form of periacetabular resection with a modular endoprosthesis reconstruction in P.Hertsen Moscow Oncology Research Institute – Branch of National Medical Research Radiological Centre of Ministry of Health of Russian Federation. There were 13 men (43%) and 17 women (57%). The median age was 45 years (23–63 years). Primary bone cancers were in 19 (63%) patients, giant cell tumors in 5 (17%), locally advanced soft tissue sarcoma in 1 (3%), solitary metastases of kidney cancer in 2 (7%), and recurrent sarcomas after previous surgical treatment in 3 (10%) patients.Results. The average duration of the operation was 310 min (145–520 min), the volume of intraoperative blood loss was 5520 ml (600–20 000 ml). The positive edge of resection according to the results of the planned morphological study was revealed in 3 (10%) patients. The average follow-up period was 36 months (4-73 months). Disease progression in terms of 6 to 40 months was revealed in 10 (33%) patients. 8 (27%) patients from disease progression. Complications of different types were diagnosed in 11 (37%) patients, among whom infectious complications prevailed 9 (30%). The average value of the functional results on a scale MSTS accounted for 59% (15 to 82%). Conclusion. The use of modular systems of endoprosthesis replacement of the acetabulum and hip joint in tumor lesions is a promising surgical technique that allows to achieve adequate functional results with a comparable number of postoperative complications