Combined Autograft and Bone Cement for Painful Chondroblastoma: A Case Report

Chondroblastomas of the talus can lead to joint collapse and are often treated using curettage and bone grafting. In the present report, we describe the case of a 19-year-old female with a large chondroblastoma of the talus associated with a secondary aneurysmal cyst. We treated the large cartilage lesion, which involved most of the talus, with an iliac bone graft combined with bone cement to fill the large bone defect and preserve the subchondral bone of the articular surface of the dome of the talus.     

Successful Limb Salvage Using Bone Transport for Complete Loss of Distal Tibia and Talus: A Case Report

Complex comminuted fractures involving the distal tibia, ankle joint, and talus are often accompanied by bone loss and are highly prone to complications such as soft tissue infection, fixation failure, and posttraumatic arthrosis, with joint reconstruction being difficult in cases with severe joint destruction or bone loss. In this case, bone transport and fusion procedures were performed to treat a patient with an open fracture involving total talar dislocation, talar bone loss, and distal tibial bone loss. Just as in this case, where the surrounding soft tissues remain healthy, limb salvage via segmental bone transport may be a reasonable option in fractures with massive bone loss that include joints.     

Metastatic Pulmonary Adenocarcinoma of the Talus: A Case Report

Tumors rarely metastasize to the foot bones; however, a misdiagnosis can lead to a poor outcome. These metastatic tumors can cause foot pain and other symptoms in patients who are asymptomatic for the primary tumor. To accurately diagnose acrometastases, the attending physician must have a high index of suspicion and conduct a thorough examination and appropriate diagnostic testing. We present a rare case of metastatic pulmonary adenocarcinoma of the talus, which was initially misdiagnosed as a benign bone cyst. After pulmonary adenocarcinoma was diagnosed, the patient received multidrug treatment for the primary and metastatic lesions and was still responding well at the 12-month follow-up visit.     

三种植骨材料局部植骨治疗骶髂关节结核的疗效比较

目的 比较三种植骨材料局部植骨治疗骶髂关节结核的疗效。方法 回顾性选取2015年2月至2021年1月我院收治的65例骶髂关节结核病人作为研究对象,骶髂关节结核病灶清除术后,27例予以载有利福平的医用硫酸钙颗粒（Osteoset人工骨组）、21例采用同种异体骨（同种异体骨组）、17例采用自体髂骨（自体髂骨组）,实施局部植骨融合术。比较三组手术时间、红细胞沉降率、术中出血量、融合分级与腰骶角、植骨愈合时间、腰骶部疼痛与下肢放射疼痛视觉模拟量表（visual analogue scale,VAS）评分、骨代谢标志物［骨钙素、β-胶原特殊序列（β-CTx）、1型胶原氨基端延长肽（P1NP）］、骨盆功能临床分级、并发症、复发率。结果 三组术后红细胞沉降率均低于术前,腰骶角均高于术前（P＜0.05）;三组手术时间、术中出血量、红细胞沉降率、腰骶角的差异无统计学意义（P＞0.05）。三组在随访中均未发现Ⅳ级融合,Osteoset人工骨组植骨融合时间短于自体髂骨组、同种异体骨组（P＜0.05）;三组术后18个月融合分级比较,差异无统计学意义（P＞0.05）。三组术后2周、4周腰骶部疼痛与下肢放射痛VAS评分均低于术前（P＜0.05）,组间的差异无统计学意义（P＞0.05）。三组术后2周、术后4周骨钙素、P1NP均高于术前（P＜0.05）;Osteoset人工骨组术后2周、术后4周骨钙素、P1NP高于自体髂骨组、同种异体骨组（P＜0.05）。三组术后18个月骨盆功能优良率比较,差异无统计学意义（P＞0.05）;三组并发症、复发率比较,差异无统计学意义（P＞0.05）。结论 病灶清除术联合自体骨、同种异体骨、人工骨移植治疗骶髂关节结核均能获得满意效果,其中载有注射用利福平的医用硫酸钙颗粒在缩短植骨融合时间、诱导骨形成中更有优势。     

Safety of, and biological and functional response to, a novel metallic implant for the management of focal full-thickness cartilage defects: Preliminary assessment in an animal model out to 1 year.

Focal full-thickness cartilage lesions of the human medial femoral condyle (MFC) can cause pain and functional impairment. Affected middle-aged patients respond unpredictably to existing treatments and knee arthroplasty may be required, prompting risk of revision. This study assesses the safety of, and biological and functional response to, a metallic resurfacing implant which may delay or obviate the need for traditional arthroplasty. The anatomic contour of the surgically exposed MFC of six adult goats was digitally mapped and an 11 mm diameter full-thickness osteochondral defect was created. An anchor-based Co-Cr resurfacing implant, matching the mapped articular contour, was implanted. Each goat's contralateral unoperated femorotibial joint was used as a control. Postoperative outcome was assessed by lameness examination, radiography, arthroscopy, synoviocentesis, necropsy, and histology up to 26 (n = 3) or 52 (n = 3) weeks. By postoperative week (POW) 4, goats demonstrated normal range of motion, no joint effusion, and only mild lameness in the operated limb. By POW 26 the animals were sound with only occasional very mild lameness. Arthroscopy at POW 14 revealed moderate synovial inflammation and a chondral membrane extending centrally across the implant surface. Radiographs at POWs 14 to 52 implied implant stability in the operated joints, as well as subchondral bone remodeling and mild exostosis formation in the operated and contralateral unoperated joints of some goats. By POW 26, histology revealed new trabecular bone abutting the implant. At POWs 26 and 52 MFC cartilage was metachromatic and intact in the operated and unoperated femorotibial joints. Proximal tibiae of some operated and unoperated limbs demonstrated limited subchondral bone remodeling and foci of articular cartilage fibrillation and thinning. The chondral membrane crossing the prosthesis possessed a metachromatic matrix containing singular and clustered chondrocytes. Our data imply the safety, biocompatibility, and functionality of the implant. Focal articular damage was documented in the operated joints at POWs 26 and 52, but lesions were much reduced over those previously reported in untreated defects. Expanded animal or preclinical human studies are justified.     

Osteochondroma of the Cuboid: A Case Report

Osteochondromas are common benign exostoses with <1% of pedal occurrences. Several cases of osteochondromas have been previously reported in the foot and ankle but none from the cuboid. In the present study, we report a case of osteochondroma originating from the cuboid in a 29-year-old male patient. The patient presented with an aching and shooting pain to his left foot that had progressed during the course of 3 years. Originally diagnosed as a fibroma, the patient had undergone cortisone injections that did not help with his symptoms. Radiographic and magnetic resonance imaging revealed an osteochondroma to the patient’s left cuboid. Surgical removal of the tumor confirmed the diagnosis. The patient had an uneventful postoperative recovery and had no recurrence after 1.5 years of follow-up. In conclusion, although osteochondromas are rare in the foot and ankle and most are benign, they can result in many symptoms and can impair patients’ quality of life, such as occurred in our patient. Recommendations for surgical excision should be determined on a case-by-case basis.     

Total Calcanectomy and Bilateral Iliac Bone Autograft Reconstruction for the Treatment of Calcaneal Chondroblastoma Involving a Secondary Aneurysmal Bone Cyst: A Case Report and Literature Review

Chondroblastoma is a rare, benign, cartilaginous-derived tumor accounting for ∼1% to 2% of all primary bone tumors and almost 9% of all benign bone tumors. In this case report, we describe a patient with chondroblastoma and a secondary aneurysmal bone cyst, with the adjacent talus being mildly affected. The initial diagnosis was giant cell tumor and was then confirmed after computed tomography–assisted biopsy. We performed a total calcanectomy via bilateral structural iliac bone autografting to relieve pain and reconstruct the loadbearing function because of the presence of extensive lesions. The patient was pain free and expressed satisfaction with postsurgical dorsiflexion and plantarflexion function at the 60-month follow-up visit. Radiographic images showed that the autografted iliac bone was completely healed, with no evidence of local recurrence.     

Longitudinal Epiphyseal Bracket of the First Metatarsal Bone: Three Case Reports and a Review of the Literature

Longitudinal epiphyseal bracket (LEB) is a rare bone dysplasia of the tubular bones. Owing to an abnormal secondary ossification center, the affected bones can develop progressive shortening and angular deformity. The aim of our study was to provide an overview of the reported data regarding epidemiology and surgical procedures available for LEB of the first metatarsal bone in a pediatric population combined with a small case series. We report a retrospective case series of 3 nonsyndromic pediatric patients with different ages and with confirmed dysplasia of the first metatarsal bone. All patients presented with unilateral congenital hallux varus deformity and underwent surgical treatment. The radiographs and medical records were reviewed to evaluate the deformity characteristics, treatment, and clinical results. The mean patient age at initial surgery was 34 (range 12 to 63) months, and the median follow-up period was 46 (range 31 to 75)?months. Almost all specific radiographic measurements showed correction of the deformity, and each foot demonstrated functional and cosmetic improvement. A standardized literature search was performed to obtain studies of LEB of the first metatarsal bone in the pediatric population. From on our results and the current data available, surgical treatment should be tailored to the patient's age and radiographic stage of LEB. However, monitoring until skeletal maturity of the feet is necessary to assess the final results.     

Femoral Head and Neck Fenestration Through a Direct Anterior Approach Combined With Compacted Autograft for the Treatment of Early Stage Nontraumatic Osteonecrosis of the Femoral Head: A Retrospective Study

BackgroundThis study aimed to evaluate the effect of femoral head and neck fenestration combined with compacted autograft (light bulb procedure) through a direct anterior approach for early stage nontraumatic osteonecrosis of the femoral head.MethodsWe conducted a retrospective cohort study investigating 66 hips undergoing the light bulb procedure through the direct anterior approach (light bulb group) and 59 hips undergoing traditional core decompression (control group). Visual analog scale pain scores and range of hip motion were evaluated before discharge to assess the quality of functional recovery. Follow-up was conducted at 6 weeks, 3 months, 6 months, and annually after surgery until 4 years. The clinical effectiveness was evaluated by Harris hip score and the University of California Los Angeles activity-level score. Patients were followed up with postoperative X-ray and computed tomography. Survival was compared between the 2 groups by radiographic progression and receiving total hip arthroplasty.ResultsThere was no significant difference in quality of functional recovery between the 2 groups. There were no significant differences in clinical outcomes within 1 year after surgery. Patients in the light bulb group had significantly better Harris hip scores and University of California Los Angeles activity-level scores from 2 years after surgery to the end of follow-up. During the 4-year follow-up, significantly fewer patients in light bulb group had radiographic progression (22.7% vs 44.1%) or received total hip arthroplasty (15.2% vs 30.5%).ConclusionsThe light bulb procedure through a direct anterior approach offers significantly better results for the treatment of early stage nontraumatic osteonecrosis of the femoral head compared with traditional core decompression.     

Split Peroneus Longus Free Tendon Autograft Transplantation for the Treatment of Neglected Extensor Hallucis Longus Tendon Laceration: A Case Report

A neglected laceration of the extensor hallucis longus (EHL) tendon is rare. Retraction of the tendon ends often occurs when a laceration is neglected, leading to a substantial tendon deficit. A paucity of case reports is available describing the treatment of EHL laceration with a large area of gap secondary to retraction. Therefore, the treatment recommendations are limited. We present the case of a neglected EHL tendon laceration with a 10.5-cm gap in a healthy 22-year-old female. The EHL tendon laceration was repaired using a split peroneus longus tendon autograft that, to the best of our knowledge, has not been previously reported. At the 3-year follow-up evaluation, the patient retained full function of her hallux and was free of symptoms.     

Light Bulb Procedure for the Treatment of Tarsal Navicular Osteonecrosis After Failed Percutaneous Decompression: A Case Report

Tarsal navicular osteonecrosis in adults is a rare condition with unclear etiology, and the optimal treatment has not been established. Here we report a case of tarsal navicular osteonecrosis with a complete course of treatment and comprehensive imaging studies starting at an early stage. A 37-year-old female diagnosed with tarsal navicular osteonecrosis was first treated with percutaneous decompression, but her symptoms persisted postoperatively. The tarsal navicular showed no further collapse, but follow-up magnetic resonance imaging (MRI) at 6 months postoperatively revealed persistent osteonecrotic changes. Debridement of the necrotic bone with preservation of the cortical shell and bone substitute packing for the defect (light bulb procedure) were performed. The symptoms resolved by 3 months postoperatively, and the patient could return to work. At a 6-year follow-up visit, the patient was free of symptoms, and MRI showed remodeling of the tarsal navicular without further collapse.     

Use of Osteochondral and Meniscal Allografts from Bone Cuts of Total Knee Arthroplasty for the Treatment of Tibial Plateau Malunions: A Case Series of Four Patients Showing Early Results

PurposeIntra-articular malunion of tibial plateau fracture is a complex problem to treat. We are presenting outcomes of our series of patients of malunited tibial plateau fractures treated with osteo-chondro-meniscal allograft from lateral tibial plateau harvested from patients undergoing total knee arthroplasty (TKA).MethodsThe technique was used in four patients. Preoperative computed tomography (CT) scan was used to match donor and recipient graft dimensions and to measure any malalignment. Patients were evaluated for Visual analogue Scale (VAS) for pain (scale 1–10 cm), WOMAC (Western Ontario McMaster Osteo-Arthritis Index) score, knee range of motion, and limb alignment.ResultsThere were three medial tibial plateau malunions and one lateral tibial plateau malunion. Articular comminution with depression was seen in all of them. One patient underwent concurrent high tibial osteotomy for the elevation of the medial tibial plateau and posterior cruciate ligament reconstruction was performed concurrently in one patient. All patients showed improvement in knee range of motion, WOMAC score, and VAS score for knee pain. Limb alignment improved in all cases. Radiologically there was consolidation of the allograft in all the cases at 6 months. The mean follow-up was 15.2 months (range 12–18 months).ConclusionOsteochondral allograft can be a good choice for reconstructing large articular cartilage defects in tibial plateau malunions. Osteo-chondro-meniscal grafts obtained during TKA can be a viable alternative for reconstructing such defects with excellent early clinical, functional, and radiological outcomes.Level of EvidenceIV.