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https://www.readbyqxmd.com/read/27906792/recurrent-osteosarcoma-presenting-as-an-isolated-bone-marrow-relapse
#1
Julia Liu, Lee Cranmer, Brandon T Larsen, Phillip H Kuo, Lisa M Kopp
Osteosarcoma (OS) is a malignant bone tumor which is found primarily in adolescents, with the distal femur as the most common location. OS with a jaw primary is present in only about 10% of cases and the risk of recurrence is considered to be decreased in the jaw versus other primary locations. We present a unique case of a patient with localized OS of the jaw with an isolated recurrence in her bone marrow almost 5 years after completion of initial treatment.
November 30, 2016: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/27904732/arthroscopic-excision-of-an-intraarticular-osteoid-osteoma-in-the-distal-femur
#2
Suk Kang, Young Sung Kim, Ho Min Lee, Min Young Lee, Jong Pil Kim
An intraarticular osteoid osteoma of the knee is uncommon, and its treatment is challenging. The authors present a case of arthroscopic excision of an intraarticular osteoid osteoma in the distal femur, which was accessible through the knee joint. After confirming the nidus of the osteoid osteoma by computed tomography, the lesion was completely removed arthroscopically. The patient reported complete pain relief immediately after surgery. This case demonstrates that intraarticular osteoid osteomas in the knee joint can be treated by arthroscopic excision and that good results can be obtained...
December 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27900510/does-a-positioning-rod-or-a-patient-specific-guide-result-in-more-natural-femoral-flexion-in-the-concept-of-kinematically-aligned-total-knee-arthroplasty
#3
Max Ettinger, Tilman Calliess, Stephen M Howell
PURPOSE: Flexion of the femoral component in 5° increments downsizes the femoral component, decreases the proximal reach and surface area of the trochlea, delays the engagement of the patella during flexion, and is associated with a higher risk of patellar-femoral instability after kinematically aligned TKA. The present study evaluated flexion of the femoral component after use of two kinematic alignment instrumentation systems. We determined whether a distal cutting block attached to a positioning rod inserted perpendicular to the distal femoral joint line in the axial plane and 8-10 cm into the distal femur anterior and posterior to the distal cortex of the femur in the sagittal plane or a femoral patient-specific cutting guide sets the femoral component in more natural flexion...
November 29, 2016: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/27898357/catastrophic-metallosis-after-tumoral-knee-prosthesis-failure-a-case-report
#4
Luca La Verde, Domenico Fenga, Maria Silvia Spinelli, Francesco Rosario Campo, Michela Florio, Michele Attilio Rosa
INTRODUCTION: Metallosis is a condition characterized by an infiltration of periprosthetic soft tissues and bone by metallic debris resulting from wear or failure of joint arthroplasties. PRESENTATION OF CASE: Authors describe a case of a 45-year-old man treated for an osteosarcoma of the distal femur with a modular prosthesis when he was 18 years old, he developed massive metallosis with skin dyspigmentation after 17 years. His medical\surgical history was remarkable for a left tumoral knee prosthesis implanted 21 years ago...
November 18, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27896363/oxygen-ultra-fine-bubbles-water-administration-prevents-bone-loss-of-glucocorticoid-induced-osteoporosis-in-mice-by-suppressing-osteoclast-differentiation
#5
T Noguchi, K Ebina, M Hirao, T Morimoto, K Koizumi, K Kitaguchi, H Matsuoka, T Iwahashi, H Yoshikawa
: Oxygen ultra-fine bubbles (OUB) saline injection prevents bone loss of glucocorti\coid-induced osteoporosis in mice, and OUB inhibit osteoclastogenesis via RANK-TRAF6-c-Fos-NFATc1 signaling and RANK-p38 MAPK signaling in vitro. INTRODUCTION: Ultra-fine bubbles (<200 nm in diameter) have several unique properties, and they are tested in various medical fields. The purpose of this study was to investigate the effects of oxygen ultra-fine bubbles (OUB) on glucocorticoid-induced osteoporosis (GIO) model mice...
November 28, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27891409/distal-femur-locking-plate-the-answer-to-all-distal-femoral-fractures
#6
Jagandeep Singh Virk, Sudhir Kumar Garg, Parmanand Gupta, Vivek Jangira, Jagdeep Singh, Sudhir Rana
INTRODUCTION: Good results have been published by researchers with distal femur nail, dynamic condylar screw and even addition of a medial plate to a distal femur locking plate for treating distal femur fractures. By this study, we explore the capability of a distal femur locking plate to counter distal femur fractures of extra- articular, partial or intra- articular nature. Positive results have been published by various groups from all over the world. AIM: To study the functional and radiological outcome of distal femoral fractures in skeletally mature patients treated by open reduction and internal fixation with distal femur locking plate...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27886361/comparison-of-anatomic-vs-straight-femoral-stem-design-in-total-hip-replacement-femoral-canal-fill-in-vivo
#7
Friso A de Boer, Elhadi Sariali
INTRODUCTION: The femoral canal fill between an anatomic and a straight prosthesis design in cementless total hip arthroplasty (THA) was compared. We hypothesised that the anatomic SPS stem has higher proximal fill and lesser distal fill than the straight stem. MATERIAL AND METHODS: The femoral canal fill was measured on 3 months routine postoperative x-rays at 5 levels of the stem in 50 consecutive patients, aged 35-83 years, who underwent 56 THA procedures by a single surgeon in this hospital...
November 22, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/27885101/giant-cell-tumor-of-talus-t-construct-method-of-bone-grafting
#8
Abhijeet B Kadam, Anoop C Dhamangaonkar
: Giant cell tumor (GCT) or osteoclastoma is a benign, locally aggressive tumor with a tendency to recur. Giant cell tumors typically occur in the epiphysis of long bones, including the distal femur and proximal tibia. They are uncommonly found in the small bones of the foot or ankle, and involvement of talus is rare. The authors present a case of GCT of the talar body in a 21-year-old man, which was diagnosed radiologically by the presence of a well-defined osteolytic lesion involving more than half of the talar body with thinning of the cortices...
November 23, 2016: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/27884141/normal-patellofemoral-kinematic-patterns-during-daily-activities-in-dogs
#9
Erica J Moore, Stanley E Kim, Scott A Banks, Antonio Pozzi, Jason D Coggeshall, Stephen C Jones
BACKGROUND: Patellar abnormalities are a common cause of pain and lameness in dogs; however, in vivo the relative motion between the femur and patella in dogs is not well described. The objective of this study was to define normal in vivo sagittal plane patellofemoral kinematics in three axes of motion using non-invasive methods. We hypothesized patellofemoral alignment in the sagittal plane would tightly correlate with the femorotibial flexion angle. Six healthy dogs without orthopedic disease underwent computed tomography (CT) of their hind limbs to create 3-D models of the patella and femur...
November 25, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27882811/the-ao-pediatric-comprehensive-classification-of-long-bone-fractures-pccf-part-ii
#10
Alexander Joeris, Nicolas Lutz, Andrea Blumenthal, Theddy Slongo, Laurent Audigé
Background and purpose - To achieve a common understanding when dealing with long bone fractures in children, the AO Pediatric Comprehensive Classification of Long Bone Fractures (AO PCCF) was introduced in 2007. As part of its final validation, we present the most relevant fracture patterns in the lower extremities of a representative population of children classified according to the PCCF. Patients and methods - We included patients up to the age of 17 who were diagnosed with 1 or more long bone fractures between January 2009 and December 2011 at either of 2 tertiary care university hospitals in Switzerland...
November 24, 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27872126/multiple-ligament-reconstruction-femoral-tunnels-intertunnel-relationships-and-guidelines-to-avoid-convergence
#11
Gilbert Moatshe, Alex W Brady, Erik L Slette, Jorge Chahla, Travis Lee Turnbull, Lars Engebretsen, Robert F LaPrade
BACKGROUND: Knee dislocations often require multiple concurrent ligament reconstructions, which involve creating several tunnels in the distal femur. Therefore, the risk of tunnel convergence is increased because of the limited bone volume within the distal aspect of the femur. PURPOSE: To assess the risk of tunnel convergence and determine the optimal reconstruction tunnel orientations for multiple ligament reconstructions in the femur. STUDY DESIGN: Descriptive laboratory study...
November 21, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27871553/fascia-iliaca-block-associated-only-with-deep-sedation-in-high-risk-patients-taking-p2y12-receptor-inhibitors-for-intramedullary-femoral-fixation-in-intertrochanteric-hip-fracture-a-series-of-3-cases
#12
Carlos Rodrigues Almeida, Emília Milheiro Francisco, Vítor Pinho-Oliveira, José Pedro Assunção
OBJECTIVE: We present a series of 3 cases in which the impact in outcome was, first of all, related to the capacity to offer early and safer treatment to some hip fracture high-risk patients using a fascia iliaca block (FIB; ropivacaine 0,5% 20 cc and mepivacaine 1,3% 15 cc, given 30 minutes before incision) associated only with deep sedation, contributing to better practice and outcome. CASE REPORTS: All elderly patients were American Society of Anesthesiologists IV patients, under P2Y12 receptor inhibitors, suffering from an intertrochanteric fracture, and purposed for intramedullary femoral fixation (IMF)...
December 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27870788/prenatal-ultrasound-evaluation-of-the-position-of-conus-medullaris-for-the-diagnosis-of-tethered-cord-syndrome
#13
Shao-Zheng He, Guo-Rong Lv, Shun-Lan Liu, Jun-Xian Ruan
To determine the conus distance between the end of the conus medullaris and the distal end of the last vertebral body in healthy fetuses with various gestational ages using ultrasonography for its diagnostic value in tethered cord syndrome (TCS). This retrospective study included 540 healthy and 8 autopsy-confirmed TCS fetuses. Ultrasonographic measurement of the conus distance was performed when the fetus was in a prone position within the spine in the near field at 14 to 41 weeks of gestational age. Linear correlation analysis was performed to analyze the relationship between the conus distance and the gestational age, biparietal diameter, femur length, head circumference, and abdominal circumference...
December 2016: Ultrasound Quarterly
https://www.readbyqxmd.com/read/27867692/osteonecrosis-of-both-knees-in-a-woman-with-crohn-s-disease
#14
Mara Barbosa, José Cotter
Osteonecrosis is a very rare complication of Crohn's disease (CD). It is not clear if it is related to corticosteroid therapy or if it occurs as an extraintestinal manifestation of inflammatory bowel disease. We present the case of a patient with CD who presented with osteonecrosis of both knees. A 22 years old woman was diagnosed with CD in April 2012 (Montreal Classification A2L1 + L4B3p). She was started on prednisolone (40 mg/d), azathioprine (100 mg/d) and messalazine (3 g/d). In July 2012, due to active perianal disease, infliximab therapy was initiated...
November 6, 2016: World Journal of Gastrointestinal Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/27867137/minimally-invasive-internal-fixation-of-distal-femur-fractures
#15
REVIEW
Guy Piétu, Mathieu Ehlinger
Fractures of the distal femur remain a daunting challenge. Since 1970, operative treatment has been recommended. Unfortunately it is fraught with complications, and techniques have been developed to limit incidence of non-union, infection and stiffness. A soft-tissue friendly approach is the key point, with minimally invasive surgery as the ultimate goal: its biological and anatomical advantages have; been demonstrated, but clinical studies have been less convincing, being based on historical series. At present, retrograde nailing and minimally invasive percutaneous plate osteosynthesis (ideally by locking plate) are the two main techniques...
November 17, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27863500/simultaneous-reconstruction-of-the-bone-and-vessels-for-complex-femoral-defect
#16
Shimpei Miyamoto, Masahide Fujiki, Nokitaka Setsu, Akira Kawai
BACKGROUND: Several methods have been reported for intercalary reconstruction of femoral defects. Of these, free vascularized fibula grafts (FVFG) are preferred because of their durability, bone-healing potential, and tolerance to infection. If the bone tumor invades the femoral vessels, simultaneous vascular reconstruction also becomes necessary and significant technical hurdles make limb salvage difficult. CASE PRESENTATION: We present a 10-year-old girl who underwent limb-sparing surgery for a distal femur osteosarcoma...
November 18, 2016: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/27855776/periprosthetic-bone-density-changes-after-minihip-tm-cementless-femoral-short-stem-one-year-results-of-dual-energy-x-ray-absorptiometry-study
#17
Ahmet Ercan, Sherif M Sokkar, Gebhard Schmid, Timm J Filler, Ashraf Abdelkafy, Joerg Jerosch
INTRODUCTION: The purpose of the current study was to investigate the reaction of the femur to the implantation of the MiniHip(TM) in terms of: (1) bone density change during one year; (2) correlations between stem length, CCD (caput-collum-diaphyseal), femoral offset, T-value, and bone density; (3) other co-variables that influence the change of bone density. PATIENTS AND METHODS: MiniHip(TM) implant was performed for 62 patients. The age range of the patients who underwent treatment was 25-78 years...
2016: SICOT-J
https://www.readbyqxmd.com/read/27847857/complicated-congenital-dislocation-of-the-knee-a-case-report
#18
Firooz Madadi, Mohammad A Tahririan, Mohsen Karami, Firoozeh Madadi
Congenital dislocation of the knee (CDK) is a rare disorder. We report the case of a 7-year-old girl with bilateral knee stiffness, marked anterior bowing of both legs, and inability to walk without aid. Radiologic investigation revealed bilateral knee joint dislocation accompanied by severe anterior bowing of both tibia proximally and posterior bowing of both femur distally, demonstrating a complicated congenital knee dislocation. Two-staged open reduction with proximal tibial osteotomy was performed to align the reduced knee joints...
October 2016: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/27845939/multiscale-and-multimodality-computed-tomography-for-cortical-bone-analysis
#19
A Ostertag, F Peyrin, P J Gouttenoire, J D Laredo, M C DeVernejoul, M Cohen Solal, C Chappard
In clinical studies, high resolution peripheral quantitative computed tomography (HR-pQCT) is used to separately evaluate cortical bone and trabecular bone with an isotropic voxel of 82 µm(3), and typical cortical parameters are cortical density (D.comp), thickness (Ct.Th), and porosity (Ct.Po). In vitro, micro-computed tomography (micro-CT) is used to explore the internal cortical bone micro-structure with isotropic voxels and high resolution synchrotron radiation (SR); micro-CT is considered the 'gold standard'...
December 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27836579/valgus-stress-radiographs-predict-lateral-compartment-cartilage-thickness-but-not-cartilage-degeneration-in-varus-osteoarthritis
#20
Wenzel Waldstein, Tom Schmidt-Braekling, Giorgio Perino, Maximilian F Kasparek, Reinhard Windhager, Friedrich Boettner
BACKGROUND: Intact cartilage in the lateral compartment is an important requirement for medial unicompartmental knee arthroplasty. This study sought to determine how measurements of joint space width in the lateral compartment on valgus stress radiographs compare to cartilage thickness as measured with a precise needle test, and whether cartilage thickness is a predictor of cartilage degeneration. METHODS: A consecutive series of 100 knees undergoing total knee arthroplasty for end-stage varus osteoarthritis was studied...
October 5, 2016: Journal of Arthroplasty
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