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1.
Korean J Radiol ; 18(2): 361-369, 2017.
Article in English | MEDLINE | ID: mdl-28246516

ABSTRACT

Ultrasound-guided core needle biopsy (US-CNB) is an important step in the diagnosis of musculoskeletal soft-tissue lesions. To maximize efficacy and minimize the complications of US-CNB, it is critical to collaborate with a multidisciplinary team and to understand the particular considerations of US-CNB for these lesions. The purpose of this article is to provide a systematic review and step-by-step tips for using US-CNB to diagnose musculoskeletal soft-tissue lesions.


Subject(s)
Biopsy, Large-Core Needle , Musculoskeletal Diseases/pathology , Soft Tissue Neoplasms/pathology , Aged , Aged, 80 and over , Female , Humans , Image-Guided Biopsy , Middle Aged , Practice Guidelines as Topic , Ultrasonography
2.
Skeletal Radiol ; 45(7): 1007-12, 2016 Jul.
Article in English | MEDLINE | ID: mdl-27048476

ABSTRACT

Tumoral pseudogout is a rare clinical form of calcium pyrophosphate dihydrate crystal deposition disease. Tumoral pseudogout can mimic other diseases such as chondroid tumor, tophaceous gout, or tumoral calcinosis. Its radiological features have been presented in some case reports, but no specific radiographic features have been identified. Here, we report an unusual case of recurrent tumoral pseudogout involving the proximal interphalangeal joint of the right long finger. This case presents with progressive radiological findings of the disease with an enlarging and recurrent calcified mass and secondary bony erosion and remodeling, along with a radiological-pathological correlation. We also review previously reported imaging findings of this disease entity, differential points in comparison to other diseases, and some key points for making the correct diagnosis.


Subject(s)
Chondrocalcinosis/diagnostic imaging , Fingers/diagnostic imaging , Joints/diagnostic imaging , Aged , Calcinosis/diagnostic imaging , Diagnosis, Differential , Fingers/pathology , Humans , Joints/pathology , Male , Radiography
3.
Korean J Radiol ; 12(4): 515-8, 2011.
Article in English | MEDLINE | ID: mdl-21852914

ABSTRACT

The computational fluid dynamics methods for the limited flow rate and the small dimensions of an intracranial artery stenosis may help demonstrate the stroke mechanism in intracranial atherosclerosis. We have modeled the high wall shear stress (WSS) in a severe M1 stenosis. The high WSS in the systolic phase of the cardiac cycle was well-correlated with a thick fibrous cap atheroma with enhancement, as was determined using high-resolution plaque imaging techniques in a severe stenosis of the middle cerebral artery.


Subject(s)
Cerebral Angiography , Intracranial Arteriosclerosis/diagnosis , Magnetic Resonance Angiography , Blood Flow Velocity , Cerebrovascular Circulation , Computational Biology , Humans , Image Interpretation, Computer-Assisted , Imaging, Three-Dimensional , Shear Strength , Software , Systole
4.
Radiology ; 259(3): 739-48, 2011 Jun.
Article in English | MEDLINE | ID: mdl-21460027

ABSTRACT

PURPOSE: To evaluate the diagnostic performance of computed tomographic (CT) enterography in identifying the source of obscure gastrointestinal bleeding and to determine clinical features associated with a higher diagnostic yield of CT enterography. MATERIALS AND METHODS: The institutional review board approved this study, with waiver of informed consent. CT enterographic images in 65 patients (46 men [mean age, 54 years; range, 18-85 years] and 19 women [mean age, 62.1 years; range, 33-79 years]) who presented with obscure gastrointestinal bleeding between August 2005 and July 2007 were reviewed retrospectively and independently by two radiologists. The diagnostic performance of CT enterography was assessed by using the results of endoscopic and other imaging examinations, surgery, and clinical follow-up as the reference standard. Differences in the diagnostic yield of CT enterography according to patient demographic and clinical features, including age, sex, type and episode of bleeding (occult, initial overt, and recurrent overt), occurrence of recent bleeding, and history of massive bleeding, were evaluated by using univariate and multivariate logistic regression analyses. RESULTS: CT enterography helped identify the source of obscure gastrointestinal bleeding in 16 (24.6%) of 65 patients. The sensitivity, specificity, positive predictive value, and negative predictive value of CT enterography were 55.2% (16 of 29), 100% (32 of 32), 100% (16 of 16), and 71.1% (32 of 45), respectively. Among patients' clinical features, a history of massive bleeding (diagnostic yield, 58.3% [seven of 12]; adjusted odds ratio, 7.2; P = .01) was independently associated with a higher diagnostic yield for CT enterography. CONCLUSION: CT enterography has a potential role in the evaluation of obscure gastrointestinal bleeding. Despite the limited sensitivity of CT enterography, positive CT enterographic findings can reliably indicate the true source of obscure gastrointestinal bleeding. CT enterography is particularly effective in helping identify the source of bleeding in patients with a history of massive bleeding. SUPPLEMENTAL MATERIAL: http://radiology.rsna.org/lookup/suppl/doi:10.1148/radiol.11101936/-/DC1.


Subject(s)
Gastrointestinal Hemorrhage/diagnostic imaging , Tomography, X-Ray Computed/methods , Adolescent , Adult , Aged , Contrast Media , Diagnosis, Differential , Endoscopy, Gastrointestinal , Female , Humans , Iohexol/analogs & derivatives , Male , Middle Aged , Predictive Value of Tests , Radiographic Image Interpretation, Computer-Assisted , Retrospective Studies , Sensitivity and Specificity
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