From the Archives of the AFIP
نویسندگان
چکیده
Chondrosarcoma is a malignant tumor that produces cartilage matrix, and lesions that arise de novo are called primary. Primary chondrosarcoma is the third most common primary malignant tumor of bone, constituting 20%–27% of all primary malignant osseous neoplasms. There are numerous types of primary chondrosarcomas, including conventional intramedullary, clear cell, juxtacortical, myxoid, mesenchymal, extraskeletal, and dedifferentiated. The conventional intramedullary chondrosarcoma is the most frequent type, and it most commonly involves the long bones or pelvis in up to 65% of cases. Although the pathologic appearance varies with specific lesion type, chondrosarcomas grow with lobular type architecture, and these hyaline cartilage nodules demonstrate high water content and peripheral enchondral ossification. Imaging features directly reflect this pathologic appearance, and the various subtypes often show distinctive features. Radiographic findings often suggest the diagnosis of chondrosarcoma because of identification of typical “ring-and-arc” chondroid matrix mineralization (representing the enchondral ossification) and aggressive features of deep endosteal scalloping and soft-tissue extension. These latter features are usually best assessed, as is lesion staging, with computed tomography (CT) or magnetic resonance (MR) imaging. CT is optimal to detect the matrix mineralization, particularly when it is subtle or when the lesion is located in anatomically complex areas. Both CT and MR imaging depict the high water content of these lesions as low attenuation and very high signal intensity with T2-weighting, respectively. Understanding and recognizing the spectrum of appearances of the various types of primary chondrosarcoma allow improved patient assessment and are vital for optimal clinical management including diagnosis, biopsy, staging, treatment, and prognosis.
منابع مشابه
In silico identification of epitopes from house cat and dog proteins as peptide immunotherapy candidates based on human leukocyte antigen binding affinity
The objective of this descriptive study was to determine Felis domesticus (cat) and Canis familiaris (dog) protein epitopes that bind strongly to selected HLA class II alleles to identify synthetic vaccine candidate epitopes and to identify individuals/populations who are likely to respond to vaccines. FASTA amino acid sequences of experimentally validated allergenic proteins of house cat and d...
متن کاملThe proposed closing of the Armed Forces Institute of Pathology.
In May 2005, the US Base Closure and Realignment (BRAC) Commission recommended the disestablishment of the Armed Forces Institute of Pathology (AFIP), which is located on the campus of Walter Reed Army Medical Center in Washington, D.C. [1]. The AFIP is a triple-service agency within the US Department of Defense and provides diagnostic, teaching , and research support to all branches of the US ...
متن کاملInjudicious use of laboratory facilities in tertiary care hospitals at rawalpindi, pakistan: a cross-sectional descriptive study
BACKGROUND In recent years inappropriate and excessive use of clinical laboratory facilities has become a cause of concern and has led to concurrent rise in the laboratory errors and the health care costs. The aim of the study was to find out the frequency of incomplete laboratory request forms, inappropriate test requests at various professional levels and the financial impact of uncollected r...
متن کامل[Primary, non-metastatic gastrointestinal stromal tumour surgery: results of the GRISK study].
INTRODUCTION AND OBJECTIVES Radical surgery is the standard treatment for localised gastrointestinal stromal tumours (GIST). A series of primary GIST, their treatment and pre-established risk of recurrence after their follow-up is evaluated. MATERIAL AND METHODS A retrospective, descriptive and multicentre study was conducted on primary, non-metastatic GIST operated on between June 2007 and D...
متن کاملBest Cases from the AFIP Maffucci Syndrome: Radiologic and Pathologic Findings1
Editor’s Note.—Everyone who has taken the course in radiologic pathology at the Armed Forces Institute of Pathology (AFIP) remembers bringing two beautifully illustrated cases for accession to the Institute. In recent years, the staff of the Department of Radiologic Pathology has judged the “best cases” by organ system, and recognition is given to the winners on the last day of the class. Begin...
متن کامل