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Min Hyun Cho, Sung Han Kim, Weon Seo Park, Jae Young Joung, Ho Kyung Seo, Jinsoo Chung, Kang Hyun Lee
BACKGROUND: Sarcomatoid urothelial carcinoma (SUC) is a rare malignant neoplasm of the urinary bladder comprising 0.2-0.6 % of all histological bladder tumor subtypes. It presents as a high-stage malignancy and exhibits aggressive biological behavior, regardless of the treatment employed. It is defined as histologically indistinguishable from sarcoma and as a high-grade biphasic neoplasm with malignant epithelial and mesenchymal components. The mean age of patients presenting with SUC is 66 years, and the male-to-female ratio is 3:1...
October 20, 2016: World Journal of Surgical Oncology
Miao Zhang, Heng Wang, Wenbin Wu, Dong Liu, Min Li, Zhengqun Hu, Hui Zhang
Adequate surgical resection was required for patients with rib chondrosarcoma. A 61-year-old woman was presented with a palpable chest wall mass. Computed tomography (CT) of the chest revealed an isolated pulmonary nodule about 0.9 cm, and a giant rib tumor about 12 cm × 9 cm which penetrated through the 7(th) rib into thorax. CT reconstruction and simulated surgery was utilized for disease-free surgical margin (R0 resection), then a simultaneous en bloc resection of pulmonary nodule and rib tumor was performed along with chest wall reconstruction under local anesthesia and intravenous sedation without endotracheal intubation...
September 2016: Annals of Translational Medicine
Markus Rupp, Jendrik Hardes, Michael J Raschke, Adrian Skwara
Hereditary multiple exostosis (HME) is an autosomal dominant disorder characterized by two or more benign growing, cartilage capped tumors of long bones called osteochondromas. If abnormal growth and clinical symptoms of osteochondromas newly appear in adults, malignant transformation of the usually benign growing tumors should be suspected and diagnostic testing should be initiated. Against the background of hypothesized higher malignant transformation of osteochondromas into chondrosarcoma in individuals with shoulder exostoses, we report a case of bilateral scapulothoracic osteochondromas in a patient suffering from HME...
September 19, 2016: Orthopedic Reviews
Karen De Amorim Bernstein, Thomas DeLaney
Achieving negative surgical margins can be challenging for skull base and spinal/paraspinal sarcomas. Data shows that pre- or post-operative radiation therapy improves local control. Delivery of sufficient dose of radiation can be difficult because of the proximity to normal organs/tissues that are sensitive to radiation therapy and therefore dose-limiting. A comprehensive literature search was conducted using PubMed search engine. The scarcity of prospective, randomized data limits the ability to generate definitive treatment recommendations...
October 2016: Journal of Surgical Oncology
Petra Balogh, Rita Bánusz, Monika Csóka, Zsófia Váradi, Edit Varga, Zoltán Sápi
BACKGROUND: Rhabdomyosarcoma (RMS) is a malignant tumor of mesenchymal origin and comprises the largest category of soft-tissue sarcomas both in children and adolescents. From a pediatric oncology point of view, RMS has traditionally been classified into alveolar (ARMS) and embryonal (ERMS) subtypes. The anatomical localization of the tumor may vary, but commonly involve the head/neck regions, male and female urogenital tract or the trunk and extremities. CASE PRESENTATION: Here, we report two challenging cases involving 17- and 9-years-olds males where diffuse and multiplex bone lesions suggested either a hematological disease or a primary bone tumor (mesenchymal chondrosarcoma)...
October 18, 2016: Diagnostic Pathology
Tomasz P Lehmann, Wojciech Juzwa, Krystyna Filipiak, Patrycja Sujka-Kordowska, Maciej Zabel, Jakub Głowacki, Maciej Głowacki, Paweł P Jagodziński
DiO and DiD are lipophilic cell labelling dyes used in the staining of cells in vivo and in vitro. The aim of the present study was to quantify the asymmetrical distribution of dyes in co‑cultured cells and to measure the intercellular transfer of DiO and DiD. DiO and DiD were applied separately to stain two identical populations of SW‑1353 human chondrosarcoma cells that were subsequently co‑cultured (homotypic co‑culture). The intercellular migration of dyes in the co‑cultured cells was measured by flow cytometry and recorded under a fluorescent microscope...
October 4, 2016: Molecular Medicine Reports
Jingjin Jiang, Qian Shen, Wei Ding, Jianying Zhou
Primary pulmonary chondrosarcoma is a rare neoplasm that usually grows slowly, metastasizes late, and responds well to excision when localized. Herein, we present a 59-year-old man who manifested with hemoptysis, cough and dyspnea with a hemithorax mass. A chest computed tomography scan demonstrated a fast-growing mass in the right upper lobe, and the enhancement was partially heterogeneous. Bronchoscopy revealed a hemorrhagic neoplasm in the right upper bronchus. A bronchoscopy biopsy specimen revealed a variety of tissues, including mucoid cartilage, fibers, respiratory epithelium and squamous epithelium...
September 2016: Journal of Thoracic Disease
Zeeshan Khan, Adam M Gerrish, Robert J Grimer
INTRODUCTION: The scapula is not an uncommon site for bone and soft tissue tumours and can be difficult to delineate on examination. Furthermore, these lesions can be potentially challenging to biopsy due to its close anatomical relationship with important structures. We present an epidemiological survey of all the scapular and periscapular lesions presenting to our institution. METHODOLOGY: This was a retrospective study with data obtained from a prospectively held electronic database over a 30-year period...
2016: SICOT-J
Yu-Ping Su, Cheng-Nan Chen, Hsin-I Chang, Kuo-Chin Huang, Chin-Chang Cheng, Fang-Yao Chiu, Ko-Chao Lee, Chun-Min Lo, Shun-Fu Chang
Low shear stress has been proposed to play a reparative role in modulating cartilage homeostasis. Recently, epidemiological studies have found a positive correlation between the resistin level in serum and synovial fluid and osteoarthritis (OA) severity in patients. However, the effect of moderate shear stress on the catabolic stimulation of resistin in OA chondrocytes remains unclear. Hence, this study was to investigate whether low shear stress could regulate resistin-induced catabolic cyclooxygenase (COX)-2 expression in human OA chondrocytes and the underlying mechanism...
October 12, 2016: Journal of Cellular Physiology
Feifei Pu, Fengxia Chen, Zengwu Shao
MicroRNAs are a group of small non-coding RNAs that play a complex role in post-transcriptional gene expression and can be used for diagnosis, prognosis, and targeted treatment. Despite advances in diagnosis and treatment of chondrosarcoma, its underpinning molecular mechanisms still remain elusive. Given the recent increasing knowledge base of micro RNA (miRNA) roles in neoplasia, both as oncogenes and tumor suppressor genes, this review will focus on discussing the available data on expression profiles and potential roles of miRNA in chondrosarcoma...
October 11, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
S Liu, J M Shapiro, E Saloustros, C A Stratakis
Protein kinase A (PKA) is an important enzyme for all eukaryotic cells. PKA phosphorylates other proteins, thus, it is essential for the regulation of many diverse cellular functions, including cytoplasmic trafficking and signaling, organelle structure and mitochondrial oxidation, nuclear gene expression, the cell cycle, and cellular division. The PKA holoenzyme is composed of 2 regulatory and 2 catalytic subunits. Four regulatory (R1α, R1β, R2α, and R2β) and 4 catalytic subunits (Cα, Cβ, Cγ, and Prkx) have been identified, giving rise to mainly PKA-I (when the 2 regulatory subunits are either R1α or R1β), or PKA-II (when the 2 regulatory subunits are either R2α or R2β)...
October 11, 2016: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
Matthias Benndorf, Jakob Neubauer, Mathias Langer, Elmar Kotter
PURPOSE: In the diagnostic process of primary bone tumors, patient age, tumor localization and to a lesser extent sex affect the differential diagnosis. We therefore aim to develop a pretest probability calculator for primary malignant bone tumors based on population data taking these variables into account. METHODS: We access the SEER (Surveillance, Epidemiology and End Results Program of the National Cancer Institute, 2015 release) database and analyze data of all primary malignant bone tumors diagnosed between 1973 and 2012...
October 8, 2016: International Journal of Computer Assisted Radiology and Surgery
Sumit Majumdar, Rajyalakshmi Boddepalli, Divya Uppala, A Kameswara Rao
Mesenchymal chondrosarcomas (MC) are rare and aggressive forms of chondrosarcoma. They are distinct tumors arising in unicentric or multicentric locations from both skeletal and extraskeletal tissues. The most affected region is the facial skeleton, especially the jaws. In this report, we present a case of MC primarily involving the mandible in a 60-year-old female patient.
September 2016: Journal of Oral and Maxillofacial Pathology: JOMFP
Nihat Demirhan Demirkiran, Olcay Akdeniz, Onur Hapa, Hasan Havıtçıoğlu
INTRODUCTION: Arthroscopic fixation of tibial spine fracture without damage to the growth plate is very important in patients with open physis. The present article describes a simple and effective technique being used for the first time to treat this condition. CASE REPORT: A 16-year-old boy sustained avulsion fractures of tibial spine while playing. He was treated arthroscopically with excellent result. CONCLUSION: Arthroscopic fixation of tibial spine fracture in patients with open physis with two cannulated screws perpendicular to each other is a very simple technique which provides strong construct, and allows early mobilization without risk of damage to the growth plate...
April 2016: Journal of Orthopaedic Case Reports
O B Pattanashetty, Dayanand B B, Arravind Pillai, Preetish Endigeri
INTRODUCTION: Dedifferentiated chondrosarcoma (DDCS) is a rare and malignant form of primary bone tumor refractive to chemotherapy and radiotherapy. It accounts for 1-2% of all primary bone tumors. Surgical resection, limb-salvage surgeries and amputation remain the mainstay of treatment. The prognosis of dedifferentiated chondrosarcoma is poor. CASE REPORT: We report a case of a 51-year-old male having a swelling and an ulcer distal to the left knee later diagnosed with dedifferentiated chondrosarcoma of proximal tibial and fibular metaphysis...
April 2016: Journal of Orthopaedic Case Reports
Ji-Zhou Zeng, Zhen-Zhong Wang, Li-Feng Ma, Hai Meng, Hao-Miao Yu, Wen-Hao Cheng, Ya-Kui Zhang, Ai Guo
Osteoarthritis (OA) is a degenerative joint disease characterized by progressive cartilage destruction, matrix degradation and bony changes. Subchondral bone alterations in osteoarthritis are associated with cartilage destruction. It has previously been demonstrated that osteoprotegerin (OPG) and receptor activator of nuclear factor κβ ligand (RANKL) mediate this process. The RANKL/OPG ratio is altered in OA chondrocytes compared with normal chondrocytes. In the pathogenesis of OA, abnormal expression levels of matrix metalloproteinase-13 (MMP-13) are secreted by chondrocytes has a vital role in the progression of cartilage erosion...
October 2016: Experimental and Therapeutic Medicine
Mahmoud E Elbashti, Yuka I Sumita, Amel M Aswehlee, Mihoko Haraguchi, Takafumi Otomaru, Mariko Hattori, Hisashi Taniguchi
This report describes the postmaxillectomy prosthetic rehabilitation of a child with maxillary chondrosarcoma over an 8-year period. Specifically, it (1) describes the planning and rehabilitation procedures carried out during the period from before the operation to the time when the patient started elementary school and (2) reports the results of evaluations of the patient's oral and psychosocial function conducted during the school phase. The prosthetic treatment plan was separated into two phases (the preschool and school phases) and was started prior to surgery, when an immediate surgical obturator was designed by the surgeons...
October 3, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Scott M Schuetze, Vanessa Bolejack, Edwin Choy, Kristen N Ganjoo, Arthur P Staddon, Warren A Chow, Hussein A Tawbi, Brian L Samuels, Shreyaskumar R Patel, Margaret von Mehren, Gina D'Amato, Kirsten M Leu, David M Loeb, Charles A Forscher, Mohammed M Milhem, Daniel A Rushing, David R Lucas, Rashmi Chugh, Denise K Reinke, Laurence H Baker
BACKGROUND: Alveolar soft part sarcoma (ASPS), chondrosarcoma (CS), chordoma, epithelioid sarcoma, and solitary fibrous tumor (SFT) are malignant tumors that are relatively resistant to chemotherapy and for which more effective drug therapy is needed. METHODS: The 5 listed subtypes were enrolled into a single indolent sarcoma cohort in a phase 2 study of dasatinib using a Bayesian continuous monitoring rule for enrollment. The primary objective was to estimate the 6-month progression-free survival (PFS) rate according to the Choi criteria with a target of ≥50%...
October 3, 2016: Cancer
Pei Liu, Jacson K Shen, Jianzhong Xu, Carol A Trahan, Francis J Hornicek, Zhenfeng Duan
Chondrosarcoma (CS) is the second most common primary malignant bone tumor. Unlike other bone tumors, CS is highly resistant to conventional chemotherapy and radiotherapy, thus resulting in poor patient outcomes. There is an urgent need to establish alternative therapies for CS. However, the etiology and pathogenesis of CS still remain elusive. Recently, DNA methylation-associated epigenetic changes have been found to play a pivotal role in the initiation and development of human cancers, including CS, by regulating target gene expression in different cellular pathways...
September 30, 2016: Epigenomics
J W Snider, S Stieb, D Poelma-Tap, L Placidi, F Albertini, A J Lomax, U Kliebsch, D C Weber, R A Schneider
No abstract text is available yet for this article.
October 1, 2016: International Journal of Radiation Oncology, Biology, Physics
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