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https://www.readbyqxmd.com/read/28906396/chondrosarcoma-of-the-patella-a-case-report
#1
Conglin Ye, Zhiping Luo, Jin Zeng, Min Dai
RATIONALE: Chondrosarcoma, characterized by the production of cartilage matrix, is a common bone tumor, accounting for 20% to 27% of all malignant bone tumors. It often occurs in the cartilage of the pelvis, femur, tibia, and humerus. However, chondrosarcoma of the patella is extremely rare. PATIENT CONCERNS: The present study describes a case of chondrosarcoma affecting the right patella in a 68-year-old woman. The chief complaints were painful swelling and limitation of motion of the right knee for about half a year...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28760125/comparison-of-the-effects-of-human-recombinant-epidermal-growth-factor-and-platelet-rich-plasma-on-healing-of-rabbit-patellar-tendon
#2
Baran Sarıkaya, Nihat Yumuşak, Akın Yigin, Serkan Sipahioğlu, Ünal Yavuz, Mehmet Akif Altay
OBJECTIVES: This study aims to compare the histological healing process and gene expression profile in tendon after the administration of human recombinant epidermal growth factor (hrEGF) and platelet-rich plasma (PRP). MATERIALS AND METHODS: A total of 24 mature New Zealand white rabbits (6-month-old; weight 2.5-3.0 kg) were used in the study. Patellar tendons of rabbits were tenotomized and then repaired. Rabbits were separated into three groups and repair areas were injected with 1 mL hrEGF in group 1 (n=9) and 1 mL PRP in group 2 (n=9)...
August 2017: Eklem Hastalıkları Ve Cerrahisi, Joint Diseases & related Surgery
https://www.readbyqxmd.com/read/28756566/pten-hamartoma-of-the-soft-tissue-the-initial-manifestation-of-an-underlying-pten-hamartoma-tumor-syndrome-in-a-4-year-old-female
#3
Charles B Chism, Lindsay Crawford, Amanda Tchakarov, Alyaa Al-Ibraheemi, Nicholas M Beckmann
A 4-year-old female was referred to pediatric orthopedic surgery for left leg pain and limping for 3 months following a motor vehicle collision. Recently, the patient's mother had noted left knee swelling and dragging of the left leg when walking. Past medical history was significant for hip dysplasia with slight leg length discrepancy. The patient was otherwise healthy. Physical examination was remarkable for left pre-patellar soft tissue fullness with normal range of motion. There was no warmth or tenderness...
July 29, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28560045/correlation-of-neuter-status-and-expression-of-heritable-disorders
#4
Janelle M Belanger, Thomas P Bellumori, Danika L Bannasch, Thomas R Famula, Anita M Oberbauer
BACKGROUND: Gonadectomy, or neutering, is a very common surgery for dogs having many positive effects on behavior, health, and longevity. There are also certain risks associated with neutering including the development of orthopedic conditions, cognitive decline, and a predisposition to some neoplasias. This study was designed specifically to identify if a correlation exists between neuter status and inherited conditions in a large aggregate cohort of dogs representing many different breeds...
2017: Canine Genetics and Epidemiology
https://www.readbyqxmd.com/read/28102813/intramedullary-amputation-neuroma-a-case-report-and-review-of-the-literature
#5
REVIEW
Laura Stone McGuire, Mandana Behbahini, Sumit Das, David Loeffler, Peter Burger, Herbert Engelhard, Tibor Valyi-Nagy, Ankit Mehta
BACKGROUND AND IMPORTANCE: Amputation neuromas consist of non-neoplastic collections of myelinated axons and Schwann cells and typically arise in injured peripheral nerves. Rarely, however, neuromas occur within the spinal cord. Intramedullary amputation neuromas have been described both with and without a history of trauma within the peripheral nervous system. We report a rare case of an isolated intramedullary spinal cord amputation neuroma. CLINICAL PRESENTATION: This 43-year-old man presented with progressive and severe gait deterioration for ~ 7 years...
March 2017: Clinical Neuropathology
https://www.readbyqxmd.com/read/27994926/intraarticular-giant-size-angiolipoma-of-the-knee-causing-lateral-patellar-dislocation
#6
Gökhan İlyas, Ali Turgut, Duygu Ayaz, Önder Kalenderer
BACKGROUND: Angiolipomas are benign tumors usually seen in patients during their 2(nd) and 3(rd) decades. The subcutaneous region of the trunk, neck and extremities are the places where they generally settle. There is only one case report on angiolipoma in the knee joint that was resected by arthroscopic procedure in the English literature. CASE REPORT: We present a case of a giant-size multilobular non-infiltrating angiolipoma, extending outside of the right knee joint and causing lateral patellar dislocation in a thirteen-year-old boy...
November 2016: Balkan Medical Journal
https://www.readbyqxmd.com/read/27942526/patellar-resurfacing-after-endoprosthetic-replacement-for-primary-or-secondary-bone-tumors
#7
COMMENT
Alexander D Liddle
No abstract text is available yet for this article.
November 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27692557/the-development-of-a-xenograft-derived-scaffold-for-tendon-and-ligament-reconstruction-using-a-decellularization-and-oxidation-protocol
#8
Thorsten M Seyler, Daniel N Bracey, Johannes F Plate, Mark O Lively, Sandeep Mannava, Thomas L Smith, Justin M Saul, Gary G Poehling, Mark E Van Dyke, Patrick W Whitlock
PURPOSE: To evaluate the biological, immunological, and biomechanical properties of a scaffold derived by architectural modification of a fresh-frozen porcine patella tendon using a decellularization protocol that combines physical, chemical, and enzymatic modalities. METHODS: Porcine patellar tendons were processed using a decellularization and oxidation protocol that combines physical, chemical, and enzymatic modalities. Scaffolds (n = 88) were compared with native tendons (n = 70) using histologic, structural (scanning electron microscopy, porosimetry, and tensile testing), biochemical (mass spectrometry, peracetic acid reduction, DNA quantification, alpha-galactosidase [α-gal] content), as well as in vitro immunologic (cytocompatibility, cytokine induction) and in vivo immunologic nonhuman primate analyses...
February 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27313738/giant-cell-tumor-of-the-patella-with-a-secondary-aneurysmal-bone-cyst-a-case-report
#9
Mingzhi Song, Wei Dai, Ran Sun, Hongfeng Liang, Bingwu Liu, Yuxuan Wu, Kai Ma, Ming Lu
The substance of the patella is an uncommon location for tumor occurrence and development. The present study reports a case of giant cell tumor (GCT) of the patella, combined with an aneurysmal bone cyst (ABC). To the best of our knowledge, this is the second report of GCT with ABC published in English. GCT is the most common type of benign tumor. Secondary ABC is frequently associated with GCT, but this symbiotic tumor rarely occurs in the patella. A 27-year-old male patient was examined at the outpatient clinic, and clinicopathological characteristics of the tumor were observed...
June 2016: Oncology Letters
https://www.readbyqxmd.com/read/27299076/a-rare-case-report-of-patellar-osteochondroma
#10
Abhinav S Bhatnagar, Kaushal Malhan, Sonu Mehta
INTRODUCTION: Osteochondroma (OC) is the most common benign tumor of the skeleton. However, patellar OC is very rare. Only five case reports have been published yet and only 1 after the year 1972. OCs grow during childhood through adolescence, but usually growing ends when the epiphyseal plates close. In an adult, the growth of an OC suggests the diagnosis of malignant transformation to a chondrosarcoma. However, enlargement of a patellar OC reported as benign after skeletal maturity is present in literature...
July 2015: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/27217817/tumors-of-the-patella-the-experience-of-institute-of-orthopedics-and-traumatology-at-university-of-s%C3%A3-o-paulo-brazil
#11
André Mathias Baptista, Sylvio Cesar Sargentini, Juan Pablo Zumárraga, André Ferrari De França Camargo, Olavo Pires De Camargo
OBJECTIVE: To obtain epidemiological data from the tumors of the patella diagnosed and treated at the Instituto de Ortopedia e Traumatologia do Hospital das Clínicas da Universidade de São Paulo (IOT-HC-FMUSP) between 1998 and 2015. METHODS: Series of cases with retrospective evaluation of patients diagnosed with tumors located in the patella. The data was obtained from the records and patients' charts at the Department of Pathology of IOT-HC-FMUSP. RESULTS: A total of 2220 medical records from patients with anatomopathological reports were included in the study...
May 2016: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/27123148/arthroscopic-excision-of-giant-cell-tumor-of-the-tendon-sheath-in-the-knee-mimicking-patellar-tendinopathy-a-case-report
#12
Kai Gao, Jiwu Chen, Shiyi Chen, Yunxia Li
Giant cell tumor of the tendon sheath (GCTTS) predominantly occurs in the tendon sheaths of the hand, but rarely in those of the knee. The current study reports the case of a 36-year-old male patient presenting with anterior knee pain. The patient was ultimately diagnosed with GCTTS in the knee mimicking patellar tendinopathy. To the best of our knowledge, this is the first case of its kind. Magnetic resonance imaging revealed a well-defined oval intra-articular lesion located at the proximal segment of the infrapatellar fat pad...
May 2016: Oncology Letters
https://www.readbyqxmd.com/read/27078131/distal-femoral-replacement-for-acute-distal-femoral-fractures-in-elderly-patients
#13
Clayton C Bettin, John C Weinlein, Patrick C Toy, Robert K Heck
OBJECTIVES: To evaluate outcomes and complications using cemented modular distal femoral replacement in elderly patients with distal femoral fractures. DESIGN: Retrospective chart review, case series. SETTING: A Level 1 and Level 2 trauma center, both tertiary referral hospitals. PATIENTS/PARTICIPANTS: Eighteen patients older than 60 years (average age 77 years) who had cemented distal femoral replacement for distal femoral fractures (comminuted, intraarticular, osteoporotic, arthritic) between 2005 and 2013...
September 2016: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/27053582/patellar-resurfacing-does-it-affect-outcomes-of-distal-femoral-replacement-after-distal-femoral-resection
#14
Mauricio Etchebehere, Patrick P Lin, Justin E Bird, Robert L Satcher, Bryan S Moon, Jun Yu, Liang Li, Valerae O Lewis
BACKGROUND: Patellar resurfacing after routine arthroplasty remains controversial. Few studies have specifically examined the effect of patellar resurfacing on outcomes after resection of the distal part of the femur and reconstruction with a megaprosthesis. Our objective was to compare the outcomes of megaprosthesis reconstructions of the distal part of the femur with and without patellar resurfacing after resection of a distal femoral tumor. METHODS: We retrospectively reviewed the clinical records of patients with a femoral tumor who underwent resection of the distal part of the femur and endoprosthetic reconstruction between 1993 and 2013...
April 6, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/26714400/-tissue-flap-repair-strategy-for-severe-defects-of-skin-and-soft-tissue-around-the-knee-joints
#15
Yuming Shen, Chunxu Ma, Xiaohua Hu, Cheng Wang, Cong Zhang
OBJECTIVE: To explore selection and method of tissue flaps for the repair of severe defects of skin and soft tissue around the knee joints. METHODS: Fifty-four patients with wounds around the knee joints, all accompanied by exposure or necrosis of tendon or bone and exposure of prosthesis, were hospitalized in our burn center from June 2008 to December 2014. Five of them were with knee joint injury. After thorough debridement or tumor resection, the wound area ranged from 5 cm × 5 cm to 46 cm × 22 cm...
October 2015: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/26640752/bone-patellar-tendon-bone-allograft-reconstruction-for-peri-patellar-tendon-sarcomas-case-series
#16
Jungo Imanishi, Damien Grinsell, Peter F M Choong
INTRODUCTION: Reconstruction after wide resection for a sarcoma involving the knee extensor mechanism is challenging even if the tumor is small. CASE DESCRIPTION: We report on four consecutive peri-patellar tendon sarcomas treated similarly at a single institution. Histological diagnoses were synovial sarcoma (two cases), clear cell sarcoma and extraskeletal Ewing's sarcoma (one case each). Follow-up periods after surgery were 18-67 months. All cases underwent pre-operative radiotherapy and subsequent surgery...
2015: SpringerPlus
https://www.readbyqxmd.com/read/26601638/patellar-height-decreasing-after-distal-femur-endoprosthesis-reconstruction-does-not-affect-functional-outcome
#17
Mauricio Etchebehere, Patrick P Lin, Bryan S Moon, Jun Yu, Liang Li, Valerae O Lewis
INTRODUCTION: The patellar height can influence extensor mechanism and the knee function. Thus, during knee arthroplasty, the surgeon seeks to maintain the correct patellar height. However, it is more difficult to define and maintain the correct patella height in megaprosthesis reconstructions after tumor resections. The objective of this study was to evaluate patellar height after distal femur endoprosthesis reconstruction and its association to knee function. METHODS: This retrospective analysis included 108 patients who underwent distal femur resections and endoprosthesis reconstruction...
February 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/26373929/the-differential-effects-of-leukocyte-containing-and-pure-platelet-rich-plasma-prp-on-tendon-stem-progenitor-cells-implications-of-prp-application-for-the-clinical-treatment-of-tendon-injuries
#18
Yiqin Zhou, Jianying Zhang, Haishan Wu, MaCalus V Hogan, James H-C Wang
INTRODUCTION: Platelet-rich plasma (PRP) is widely used to treat tendon injuries in clinics. These PRP preparations often contain white blood cells or leukocytes, and the precise cellular effects of leukocyte-rich PRP (L-PRP) on tendons are not well defined. Therefore, in this study, we determined the effects of L-PRP on tendon stem/progenitor cells (TSCs), which play a key role in tendon homeostasis and repair. METHODS: TSCs isolated from the patellar tendons of rabbits were treated with L-PRP or P-PRP (pure PRP without leukocytes) in vitro, followed by measuring cell proliferation, stem cell marker expression, inflammatory gene expression, and anabolic and catabolic protein expression by using immunostaining, quantitative real-time polymerase chain reaction, Western blot, and enzyme-linked immunosorbent assay, respectively...
September 15, 2015: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/26224822/function-of-the-extensor-mechanism-of-the-knee-after-using-the-patellar-loop-technique-to-reconstruct-the-patellar-tendon-when-replacing-the-proximal-tibia-for-tumour
#19
H Pilge, B M Holzapfel, H Rechl, P M Prodinger, R Lampe, U Saur, R Eisenhart-Rothe, H Gollwitzer
The aim of this study was to analyse the gait pattern, muscle force and functional outcome of patients who had undergone replacement of the proximal tibia for tumour and alloplastic reconstruction of the extensor mechanism using the patellar-loop technique. Between February 1998 and December 2009, we carried out wide local excision of a primary sarcoma of the proximal tibia, proximal tibial replacement and reconstruction of the extensor mechanism using the patellar-loop technique in 18 patients. Of these, nine were available for evaluation after a mean of 11...
August 2015: Bone & Joint Journal
https://www.readbyqxmd.com/read/26193207/proximal-tibial-osteosarcoma-in-young-patients-early-diagnosis-modular-reconstruction
#20
Răzvan Ene, Ruxandra Diana Sinescu, Patricia Ene, Dan Popescu, Monica Mihaela Cîrstoiu, Florin Cătălin Cîrstoiu
Osteosarcoma is the most common bone tumor that occurs in children and young adults with prevalence of teenage. There can be identified many subtypes of osteosarcoma by how they look on X-rays and under the microscope. Osteosarcoma can be classified as high-grade, intermediate grade, or low-grade. This has a significant prognostic value of tumor development suggesting the growth rate and the potential for expansion. Between 2009-2013, in the Department of Orthopedics and Traumatology, University Emergency Hospital of Bucharest, Romania, were treated seven cases of osteosarcoma of the proximal third of the tibia in young, early-diagnosed cases without metastasis...
2015: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
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