Evaluation of triage tool for low‐grade cartilage tumors: Four‐quadrant approach

2021 ◽  
Author(s):  
Katherine M. Schumacher ◽  
Timothy A. Damron
Keyword(s):  
Low Grade ◽  
Cartilage Tumors ◽  
Four Quadrant

Endoscopic Surveillance Practice for Barrett's Oesophagus in Scotland and Early Experience in Implementing Local Guidelines

2003 ◽  
Vol 48 (2) ◽  
pp. 43-45 ◽  
Author(s):  
E F Shen ◽  
S Gladstone ◽  
G Milne ◽  
S Paterson-Brown ◽  
I D Penman
Keyword(s):  
Early Experience ◽  
High Grade Dysplasia ◽  
Low Grade ◽  
High Grade ◽  
Wide Variability ◽  
Low Grade Dysplasia ◽  
Surveillance Practice ◽  
Four Quadrant ◽  
The Impact

Management of columnar lined oesophagus (CLO; Barrett s oesophagus) is controversial. We prospectively audited surveillance practices in Scotland and prospectively assessed the impact of introducing local guidelines for Barrett s surveillance in Edinburgh. Most respondents were gastroenterologists. The majority take random, not four quadrant, biopsies from the CLO. In Edinburgh during 2000, 80 patients underwent surveillance. The guideline protocol was not followed in 30 (37.5%) patients. Follow up of patients without dysplasia generally conformed to the guidelines. Follow up of patients with low grade dysplasia was highly variable while management of those with high grade dysplasia followed the guidelines. Overall we found a wide variability in the management and surveillance of CLO. Early experience suggests that implementation of guidelines is helpful but there is still variation in practice.

scholarly journals Curettage and Cryosurgery for Low-grade Cartilage Tumors Is Associated with Low Recurrence and High Function

2010 ◽  
Vol 468 (10) ◽  
pp. 2765-2773 ◽  
Author(s):  
David G. Mohler ◽  
Richard Chiu ◽  
David A. McCall ◽  
Raffi S. Avedian
Keyword(s):  
Low Grade ◽  
Cartilage Tumors

503 LOW-GRADE INTRAMEDULLARY CARTILAGE TUMORS: A REASSESSMENT OF DIAGNOSIS AND TREATMENT.

2006 ◽  
Vol 54 (1) ◽  
pp. S166.2-S166
Author(s):  
D. Shearer ◽  
B. P. Rubin ◽  
J. F. Eary ◽  
E. U. Conrad
Keyword(s):  
Diagnosis And Treatment ◽  
Low Grade ◽  
Cartilage Tumors

scholarly journals Malignant Progression in Two Children with Multiple Osteochondromas

Sarcoma ◽  
2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Gregory A. Schmale ◽  
Douglas S. Hawkins ◽  
Joe Rutledge ◽  
Ernest U. Conrad
Keyword(s):  
Malignant Transformation ◽  
Metastatic Disease ◽  
Malignant Progression ◽  
Low Grade ◽  
Skeletally Immature ◽  
Multiple Osteochondromas ◽  
Secondary Chondrosarcoma ◽  
Cartilage Tumors ◽  
Low Incidence

Multiple Osteochondromas (MO) is a disease of benign bony growths with a low incidence of malignant transformation. Secondary chondrosarcoma in children is rare even in children with MO. Making a diagnosis of malignancy in low-grade cartilage tumors is challenging and requires consideration of clinical, radiographic, and histopathological factors. We report two cases of skeletally immature patients with MO who presented with rapidly enlarging and radiographically aggressive lesions consistent with malignant transformation. Both underwent allograft reconstruction of the involved site with no signs of recurrence or metastatic disease at a minimum of four-year follow-up.

Low-grade Cartilage Tumors: Diagnosis and Treatment

Orthopedics ◽  
2007 ◽  
Vol 30 (1) ◽  
pp. 35-46 ◽  
Author(s):  
Mark Ryzewicz ◽  
B. J. Manaster ◽  
Erick Naar ◽  
Bennie Lindeque
Keyword(s):  
Diagnosis And Treatment ◽  
Low Grade ◽  
Cartilage Tumors

scholarly journals A Survey of Canadian Gastroenterologists about the Management of Barrett’s Esophagus

2003 ◽  
Vol 17 (5) ◽  
pp. 313-317 ◽  
Author(s):  
Lisa MacNeil-Covin ◽  
Alan G Casson ◽  
Dickran Malatjalian ◽  
Sander Veldhuyzen van Zanten
Keyword(s):  
Gastroesophageal Reflux ◽  
Barrett’S Esophagus ◽  
Barrett's Esophagus ◽  
Overall Response Rate ◽  
Practice Patterns ◽  
Low Grade ◽  
Canadian Association ◽  
Four Quadrant ◽  
Current Guidelines ◽  
Structured Questionnaire

The aims of the present study were to determine practice patterns of Canadian gastroenterologists for screening patients with Barrett’s esophagus and to compare current practice patterns with published guidelines. A secondary goal was to evaluate whether gastroenterologists recommend a ’once in a lifetime’ endoscopy for patients with chronic gastroesophageal reflux disease. A structured questionnaire regarding screening for Barrett’s esophagus was sent to members of the Canadian Association of Gastroenterology. The overall response rate was 51% (203 of 396). Of the 203 respondents, 165 (81%) performed endoscopies in adults and form the basis of this report. The majority of Canadian gastroenterologists followed published guidelines, with 62% screening patients without dysplasia every two years. Patients with low grade dysplasia were screened more frequently, with 54% of respondents performing endoscopy every six months, and 35% on a yearly basis. Biopsy protocols showed the greatest variation, with 46% of gastroenterologists taking four-quadrant biopsies at 2 cm intervals along the columnar-lined (Barrett’s) esophagus. Seventy-six per cent of gastroenterologists agreed that all patients with chronic gastroesophageal reflux should have a ’once in a lifetime’ endoscopy to screen for Barrett’s esophagus. The majority of Canadian gastroenterologists follow current guidelines for the management of Barrett’s esophagus and support the concept of ’once in a lifetime’ endoscopy.

Direct Observation of Crystalline Ordering In Naturally Graphitized Carbon Produced by Low Grade Metamorphism

1977 ◽  
Vol 35 ◽  
pp. 162-163
Author(s):  
Thomas R. McKee ◽  
Peter R. Buseck
Keyword(s):  
Crystallite Size ◽  
Sedimentary Rocks ◽  
Carbonaceous Material ◽  
Low Grade ◽  
X Ray ◽  
Graphitized Carbon ◽  
Transmission Electron ◽  
Heat Treated ◽  
Commercial Carbon ◽  
Metamorphic Zone

Sediments commonly contain organic material which appears as refractory carbonaceous material in metamorphosed sedimentary rocks. Grew and others have shown that relative carbon content, crystallite size, X-ray crystallinity and development of well-ordered graphite crystal structure of the carbonaceous material increases with increasing metamorphic grade. The graphitization process is irreversible and appears to be continous from the amorphous to the completely graphitized stage. The most dramatic chemical and crystallographic changes take place within the chlorite metamorphic zone.The detailed X-ray investigation of crystallite size and crystalline ordering is complex and can best be investigated by other means such as high resolution transmission electron microscopy (HRTEM). The natural graphitization series is similar to that for heat-treated commercial carbon blacks, which have been successfully studied by HRTEM (Ban and others).

Scanning Electron Microscope Study of Bacteria on Mineral Surfaces

1976 ◽  
Vol 34 ◽  
pp. 130-131
Author(s):  
V.K. Berry
Keyword(s):  
Oxidation Reaction ◽  
Electron Microscope Study ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans ◽  
Physical Contact ◽  
Metal Sulfides ◽  
Low Grade ◽  
Mineral Surfaces ◽  
Mineral Surface ◽  
Scanning Electron Microscope Study

There are two strains of bacteria viz. Thiobacillus thiooxidansand Thiobacillus ferrooxidanswidely mentioned to play an important role in the leaching process of low-grade ores. Another strain used in this study is a thermophile and is designated Caldariella .These microorganisms are acidophilic chemosynthetic aerobic autotrophs and are capable of oxidizing many metal sulfides and elemental sulfur to sulfates and Fe2+ to Fe3+. The necessity of physical contact or attachment by bacteria to mineral surfaces during oxidation reaction has not been fairly established so far. Temple and Koehler reported that during oxidation of marcasite T. thiooxidanswere found concentrated on mineral surface. Schaeffer, et al. demonstrated that physical contact or attachment is essential for oxidation of sulfur.

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