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Bone tumors

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https://www.readbyqxmd.com/read/29228234/tgfbr2-inactivation-facilitates-cellular-plasticity-and-development-of-pten-null-prostate-cancer
#1
Wei Zhao, Peng Tan, Qingyuan Zhu, Adebusola Ajibade, Teng Long, Wenyong Long, Qingtian Li, Pinghua Liu, Bo Ning, Helen Y Wang, Rong-Fu Wang
Mutations in tumors can create a state of increased cellular plasticity that promotes resistance to treatment. Thus, there is an urgent need to develop novel strategies for identifying key factors that regulate cellular plasticity in order to combat resistance to chemotherapy and radiation treatment. Here we report that prostate epithelial cell reprogramming could be exploited to identify key factors required for promoting prostate cancer tumorigenesis and cellular plasticity. Deletion of phosphatase and tensin homolog (Pten) and transforming growth factor-beta receptor type 2 (Tgfbr2) may increase prostate epithelial cell reprogramming efficiency in vitro and cause rapid tumor development and early mortality in vivo...
December 8, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/29227372/osteofibrous-dysplasia-of-the-tibia-in-children-outcome-without-resection
#2
Daniel Westacott, Peter Kannu, Jennifer Stimec, Sevan Hopyan, Andrew Howard
BACKGROUND: The proposed association between osteofibrous dysplasia and adamantinoma has led some to advocate resection of the entire lesion, which can require major subsequent reconstruction. However, this link remains unproven and there is some support in more recent literature for a less aggressive approach. This study aims to describe our experience managing pediatric tibial osteofibrous dysplasia with such an approach and to report functional outcomes in children treated thus. METHODS: A total of 28 cases of osteofibrous dysplasia in 25 patients were managed at a referral center for pediatric bone tumors with observation in the first instance, then limited surgical intervention if required to address pain and deformity...
December 8, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29227282/hypoxia-induced-upregulation-of-bmx-kinase-mediates-therapeutic-resistance-in-acute-myeloid-leukemia
#3
Jolieke G van Oosterwijk, Daelynn R Buelow, Christina D Drenberg, Aksana Vasilyeva, Lie Li, Lei Shi, Yong-Dong Wang, David Finkelstein, Sheila A Shurtleff, Laura J Janke, Stanley Pounds, Jeffrey E Rubnitz, Hiroto Inaba, Navjotsingh Pabla, Sharyn D Baker
Oncogenic addiction to the Fms-like tyrosine kinase 3 (FLT3) is a hallmark of acute myeloid leukemia (AML) that harbors the FLT3-internal tandem duplication (FLT3-ITD) mutation. While FLT3 inhibitors like sorafenib show initial therapeutic efficacy, resistance rapidly develops through mechanisms that are incompletely understood. Here, we used RNA-Seq-based analysis of patient leukemic cells and found that upregulation of the Tec family kinase BMX occurs during sorafenib resistance. This upregulation was recapitulated in an in vivo murine FLT3-ITD-positive (FLT3-ITD+) model of sorafenib resistance...
December 11, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29227121/-what%C3%A2-s%C3%A2-new-in-ewing-like-sarcoma-family-soft-tissue-and-bone-sarcomas-with-cic-bcor-rearrangement-review-of-the-literature-and-first-personal-experience
#4
Zdeněk Kinkor, Petr Grossmann, Magdaléna Dubová, David Bludovský, Andrea Černá, Lenka Krsková, Petr Lhoták
The literature is reviewed regarding of a rare molecularly defined group of sarcomas with rearrangement of both CIC and BCOR genes, which were originally placed into the EWSR1wt Ewing-like category. Personal experience with three cases demonstrating difficulties of this issue is added. Both groups of lesions differ not only by age and topography, but also vary in both the prognostic and the predictive parameters. CIC-rearranged tumors are very aggressive and almost never occur in the skeleton; in contrary, the BCOR-rearranged ones are predominantly bone tumors in young males behaving even better than classical Ewing sarcoma...
2017: Ceskoslovenská Patologie
https://www.readbyqxmd.com/read/29226854/diagnostic-and-prognostic-relevance-of-serum-mir-195-in-pediatric-acute-myeloid-leukemia
#5
Ze Hong, Rongrong Zhang, Haixiao Qi
BACKGROUND: MicroRNA-195 acts as a tumor suppressor in a variety of cancers. However, its clinical significance in pediatric acute myeloid leukemia (AML) remains largely undefined. OBJECTIVE: To investigate the diagnostic and prognostic relevance of miR-195 in this malignancy. METHODS: Expression levels of miR-195 in peripheral blood and bone marrow samples of patients with pediatric AML and normal controls were detected by real-time quantitative PCR...
November 27, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/29226824/mdixon-based-texture-analysis-of-an-intraosseous-lipoma-a-case-report-and-current-review-for-the-dental-clinician
#6
Kyung Mi Lee, Hyug-Gi Kim, Yeon-Hee Lee, Eui Jong Kim
An intraosseous lipoma is a rare histologic variant of lipoma, accounting for only 0.1% of all primary bone tumors. This may not be the actual incidence because most of these lesions are frequently asymptomatic, but imaging modalities, such as computed tomography or magnetic resonance imaging (MRI) seem to have increased the detection rate. Lipoma occasionally undergoes osseous metaplasia and becomes an osseous lipoma. Although there are numerous papers discussing intraosseous lipoma and some authors have tried to differentiate lipomas from osseous lipomas, there is still a great deal of confusion with regard to characteristic radiologic features and the use of terms...
December 6, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29226200/long-term-results-of-osteoarticular-allograft-reconstruction-in-children-with-distal-femoral-bone-tumors
#7
Khodamorad Jamshidi, Mehrdad Bahrabadi, Alireza Mirzaei
Background: There is no consensus regarding the best method of reconstruction in pediatric population following the wide resection of malignant bone tumors. More exploration of the complications of osteoarticular reconstruction leads to less existing controversy of this type of reconstruction, which is the main point of this article. Methods: Long-term outcomes and complications of osteoarticular allograft reconstruction of primary distal femoral bone sarcomas in 22 children with mean age of 10...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29226089/oncolytic-adenoviruses-as-a-therapeutic-approach-for-osteosarcoma-a-new-hope
#8
REVIEW
Marc Garcia-Moure, Naiara Martinez-Vélez, Ana Patiño-García, Marta M Alonso
Osteosarcoma is the most common bone cancer among those with non-hematological origin and affects mainly pediatric patients. In the last 50 years, refinements in surgical procedures, as well as the introduction of aggressive neoadjuvant and adjuvant chemotherapeutic cocktails, have increased to nearly 70% the survival rate of these patients. Despite the initial therapeutic progress the fight against osteosarcoma has not substantially improved during the last three decades, and almost 30% of the patients do not respond or recur after the standard treatment...
November 2017: Journal of Bone Oncology
https://www.readbyqxmd.com/read/29225843/rapid-postoperative-recurrence-of-a-cranial-multilobular-tumor-of-bone-in-a-young-dog
#9
Simon Cook, Alexander Civello, Richard Lam, Joe Fenn, David Neilson, Simon Priestnall, Steven De Decker
Although resection of multilobular tumors of bone can be associated with a good prognosis and long disease-free intervals in dogs, osteosarcomatous transformation should be considered a cause for rapid recurrence of clinical signs.
December 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29224292/-roles-of-osteogenic-niche-in-malignant-tumor-with-bone-metastasis
#10
Y Y Zhu, L Zhang, Z S Tong
No abstract text is available yet for this article.
December 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29223746/bcap-promotes-osteoclast-differentiation-through-regulation-of-the-p38-dependent-creb-signaling-pathway
#11
Jung Ha Kim, Kabsun Kim, Inyoung Kim, Semun Seong, Keun-Bae Lee, Nacksung Kim
Many studies have determined that PI3K-Akt signaling pathways play important roles in osteoclast differentiation and function. In the present study, we investigated the roles of B-cell adaptor for PI3K (BCAP), which is a PI3K binding molecule, in osteoclasts. Overexpression of BCAP in osteoclast precursor cells enhanced osteoclast differentiation induced by tumor necrosis factor alpha (TNF-α) as well as receptor activator of nuclear factor-κB ligand (RANKL). Conversely, osteoclast differentiation mediated by both cytokines was attenuated when BCAP expression was downregulated using small interfering RNA...
December 6, 2017: Bone
https://www.readbyqxmd.com/read/29222326/acquired-ribosomopathies-in-leukemia-and-solid-tumors
#12
REVIEW
Adrianna Vlachos
A mutation in the gene encoding the small subunit-associated ribosomal protein RPS19, leading to RPS19 haploinsufficiency, is one of the ribosomal protein gene defects responsible for the rare inherited bone marrow failure syndrome Diamond Blackfan anemia (DBA). Additional inherited and acquired defects in ribosomal proteins (RPs) continue to be identified and are the basis for a new class of diseases called the ribosomopathies. Acquired RPS14 haploinsufficiency has been found to be causative of the bone marrow failure found in 5q- myelodysplastic syndromes...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29222312/harnessing-the-power-of-the-immune-system-in-non-hodgkin-lymphoma-immunomodulators-checkpoint-inhibitors-and-beyond
#13
REVIEW
Stephen M Ansell
Non-Hodgkin lymphoma is a malignancy of B lymphocytes that typically infiltrate sites of disease, including the lymph nodes, spleen, and bone marrow. Beyond the presence of malignant cells, many immune cells are also present within the tumor microenvironment. Although these immune cells have the potential to regulate the growth of malignant B cells, intratumoral immune cells are unable to eradicate lymphoma cells and most patients with lymphoma have clinical evidence of disease progression. Recent data have identified some of the mechanisms that account for the suppressed antitumor immune response and have created opportunities for treatment to overcome the deficiencies...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29222262/pediatric-leukemia-susceptibility-disorders-manifestations-and-management
#14
REVIEW
Lisa J McReynolds, Sharon A Savage
The clinical manifestations of inherited susceptibility to leukemia encompass a wide phenotypic range, including patients with certain congenital anomalies or early-onset myelodysplastic syndrome (MDS) and some with no obvious medical problems until they develop leukemia. Leukemia susceptibility syndromes occur as a result of autosomal dominant, autosomal recessive, or X-linked recessive inheritance, or de novo occurrence, of germline pathogenic variants in DNA repair, ribosome biogenesis, telomere biology, hematopoietic transcription factors, tumor suppressors, and other critical cellular processes...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29222189/osteoblasts-promote-release-of-tumor-promoting-siglecfhi-neutrophils
#15
(no author information available yet)
Lung tumors activate OCN+ osteoblasts in distant bone stroma to supply tumor-infiltrating neutrophils.
December 8, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/29221844/gabapentin-as-an-adjuvant-therapy-for-prevention-of-acute-phantom-limb-pain-in-pediatric-patients-undergoing-amputation-for-malignant-bone-tumors-a-prospective-double-blind-randomized-controlled-trial
#16
Xiandi Wang, Ying Yi, Dingbo Tang, Yi Chen, Yanhua Jiang, Jun Peng, Jiwei Xiao
CONTEXT: Gabapentin is reported to have an analgesic effect of reducing phantom-limb pain(PLP) in adult patients. There's no study on preoperative use of gabapentin in pediatric population in term of PLP prevention. OBJECTIVE: To determine whether gabapentin could be used as an adjuvant agent of opioid-based pain control to lower the rate of phantom-limb pain in pediatric patients undergoing amputation for malignant bone tumors in observation period of 60 days post-operatively...
December 5, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/29221499/an-unusual-osteoma-in-the-mandibular-condyle-and-the-successful-replacement-of-the-temporomandibular-joint-with-a-custom-made-prosthesis-a-case-report
#17
Natalia Tavares de Souza, Renan Carlos Lopes Cavalcante, Maria Aparecida de Albuquerque Cavalcante, Wagner Hespanhol, Marcello Rodrigues de Oliveira, Dennis de Carvalho Ferreira, Thais Machado de Carvalho Coutinho, Lucio Souza Gonçalves
BACKGROUND: An osteoma is a benign tumor of bone with unknown etiology and is considered rare, mostly restricted to the craniofacial skeleton. CASE PRESENTATION: This case report describes an uncommon condylar osteoma in a 67 years old white female patient with laterognathism to the left side, limited mouth opening, aesthetic change and pain associated with the right temporomandibular joint (TMJ). The histopathological examination confirmed osteoma. The lesion was surgically excised and immediate reconstruction was carried out using a custom-made total TMJ prosthesis...
December 8, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29221466/unusual-pathological-fracture-of-the-clavicle-revealing-primary-hyperparathyroidism-a-case-report
#18
Yassir Benameur, Hasnae Guerrouj, Imad Ghfir, Nouzha Ben Rais Aouad
BACKGROUND: Primary hyperparathyroidism revealed by a pathological fracture is very uncommon; in the majority of cases the discovery of lytic bone lesions on imaging examinations evokes in the clinician first a neoplastic etiology and a metabolic origin is often omitted. This case report adds to the existing literature as it describes an unusual presentation of primary hyperparathyroidism. CASE PRESENTATION: We report a case of a 50-year-old Moroccan man, without any known tumor, who presented a fracture of his left clavicle with multiple osteolytic lesions on computed tomography suggesting bone metastases...
December 9, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29221197/rank-expression-in-ebv-positive-nasopharyngeal-carcinoma-metastasis-a-ready-to-treat-target
#19
Carlo Resteghini, Salvatore Alfieri, Pasquale Quattrone, Francesca Dominoni, Giovanna Garzone, Ester Orlandi, Laura Locati, Cristiana Bergamini, Donata Galbiati, Nicola Alessandro Iacovelli, Carlo Fallai, Lisa Licitra, Paolo Bossi
Epstein Barr Virus (EBV) related Nasopharyngeal Carcinoma (NPC), is an highly chemo- and radiosensitive endemic malignancy in southeast Asia. More than one third of locally advanced cases relapse after curative treatment, especially because of bone, liver and lung metastases. Lymphocyte sub-populations favour EBV-associated carcinogenesis and tumour progression and several strategies aim to reverse this phenomenon. Receptor activator of NF-kB (RANK) and its Ligand (RANKL), key regulator of bone metabolisms, are expressed in several malignancies and tumor-infiltrating Tregs...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29221109/protein-phosphatase-4-regulatory-subunit-2-ppp4r2-is-recurrently-deleted-in-acute-myeloid-leukemia-and-required-for-efficient-dna-double-strand-break-repair
#20
Julia K Herzig, Lars Bullinger, Alpaslan Tasdogan, Philipp Zimmermann, Martin Schlegel, Veronica Teleanu, Daniela Weber, Frank G Rücker, Peter Paschka, Anna Dolnik, Edith Schneider, Florian Kuchenbauer, Florian H Heidel, Christian Buske, Hartmut Döhner, Konstanze Döhner, Verena I Gaidzik
We have previously identified a recurrent deletion at chromosomal band 3p14.1-p13 in patients with acute myeloid leukemia (AML). Among eight protein-coding genes, this microdeletion affects the protein phosphatase 4 regulatory subunit 2 (PPP4R2), which plays an important role in DNA damage response (DDR). Investigation of mRNA expression during murine myelopoiesis determined that Ppp4r2 is higher expressed in more primitive hematopoietic cells. PPP4R2 expression in primary AML samples compared to healthy bone marrow was significantly lower, particularly in patients with 3p microdeletion or complex karyotype...
November 10, 2017: Oncotarget
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