scholarly journals Comparison of imaging characteristics on computed tomography and magnetic resonance urography in urological conditions

2021 ◽  
Vol 8 (1) ◽  
pp. 50
Author(s):  
Rajul Rastogi ◽  
Nitya Verma ◽  
Vijai Pratap ◽  
Arawat Pushkarna
Keyword(s):  
Computed Tomography ◽  
Magnetic Resonance ◽  
Magnetic Resonance Urography ◽  
Imaging Characteristics

Imaging findings of trichilemmal cyst and proliferating trichilemmal tumour

2021 ◽  
pp. 197140092110177
Author(s):  
Masaya Kawaguchi ◽  
Hiroki Kato ◽  
Natsuko Suzui ◽  
Tatsuhiko Miyazaki ◽  
Hiroyuki Tomita ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Hounsfield Units ◽  
Soft Tissue Density ◽  
Cutaneous Lesions ◽  
Imaging Characteristics ◽  
Trichilemmal Cyst ◽  
T1 Hyperintensity

Purpose The purpose of this study was to evaluate computed tomography and magnetic resonance imaging of benign trichilemmal cysts and proliferating trichilemmal tumours. Methods Nineteen histologically confirmed cutaneous lesions with trichilemmal keratinisation (12 trichilemmal cysts and seven proliferating trichilemmal tumours) were enrolled. Among them, 10 lesions (six trichilemmal cysts and four proliferating trichilemmal tumours) were examined by computed tomography, while 13 lesions (eight trichilemmal cysts and five proliferating trichilemmal tumours) were examined by magnetic resonance imaging. Computed tomography and magnetic resonance imaging characteristics were retrospectively reviewed. RESULTS Sixteen lesions (84%, 10 trichilemmal cysts and six proliferating trichilemmal tumours) occurred on the scalp. Lobulated margins were observed in five lesions (26%, three trichilemmal cysts and two proliferating trichilemmal tumours). With respect to computed tomography attenuation, calcification (>200 Hounsfield units) was observed in seven lesions (70%, five trichilemmal cysts and two proliferating trichilemmal tumours), hyperdense areas (≥80 and ≤200 Hounsfield units) in six (60%, three trichilemmal cysts and three proliferating trichilemmal tumours), and soft tissue density areas (<80 Hounsfield units) in nine (90%, five trichilemmal cysts and four proliferating trichilemmal tumours). On T1-weighted images, intratumoral hyperintensity was only observed in eight trichilemmal cysts but no proliferating trichilemmal tumours (100% vs. 0%, P<0.01). On T2-weighted images, hypointense rim and intratumoral hypointensity was observed in all 13 lesions (100%, eight trichilemmal cysts and five proliferating trichilemmal tumours), and linear or reticular hypointensity was observed in 10 (77%, six trichilemmal cysts and four proliferating trichilemmal tumours). Conclusion Trichilemmal cysts and proliferating trichilemmal tumours predominantly occurred on the scalp with calcification, and usually exhibited linear or reticular T2 hypointensity. Intratumoral T1 hyperintensity may be a useful imaging feature for differentiating trichilemmal cysts from proliferating trichilemmal tumours.

scholarly journals Extranodal NK/T-cell lymphoma in adolescents: imaging findings of a consecutive 7-year case series

2019 ◽  
Vol 47 (3) ◽  
pp. 1210-1220 ◽  
Author(s):  
Pujun Guan ◽  
Zihang Chen ◽  
Lei Chu ◽  
Li Zhen ◽  
Li Zhang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
T Cell ◽  
Magnetic Resonance ◽  
Communication Systems ◽  
Cell Lymphoma ◽  
Magnetic Resonance Images ◽  
T Cell Lymphoma ◽  
Imaging Characteristics ◽  
Adjacent Structures ◽  
Nk T Cell

Objectives Extranodal NK/T-cell lymphoma is reportedly a rare but emerging type of lymphoma in adolescents. The present study was performed to specify its imaging characteristics. Methods Our hospital’s picture archiving and communication systems were searched from January 2009 to December 2016. We identified 13 patients aged <18 years with pathologically confirmed extranodal NK/T-cell lymphoma in the head and neck region. The computed tomography and magnetic resonance images were reviewed to summarize the imaging characteristics of extranodal NK/T-cell lymphoma in adolescents. Results The mean age at onset was 15.2 ± 1.46 years (range, 12–17 years) with a male:female ratio of 1.17:1.00. Most of the patients (n = 10) displayed nasal cavity and/or paranasal involvement. The tumor was homogeneous in both computed tomography and magnetic resonance images and showed slight enhancement. No calcification or liquefactive necrosis was observed. Adjacent structures were usually involved. Conclusion Suggestive imaging characteristics could acquaint specialists with extranodal NK/T-cell lymphoma in adolescents, facilitating improved early recognition of the diagnosis and helping to improve the patient’s outcome.

scholarly journals Adrenal Lesions: Spectrum of Imaging Findings with Emphasis on Multi-Detector Computed Tomography and Magnetic Resonance Imaging

2013 ◽  
Vol 3 ◽  
pp. 61 ◽  
Author(s):  
Antonino Guerrisi ◽  
Daniele Marin ◽  
Mahbubeh Baski ◽  
Pietro Guerrisi ◽  
Federica Capozza ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Hormonal Stimulation ◽  
Primary Tumors ◽  
Imaging Characteristics ◽  
Adrenal Masses ◽  
Malignant Lesions ◽  
Complementary Techniques ◽  
Multi Detector Computed Tomography

The adrenal gland is a common site of a large spectrum of abnormalities like primary tumors, hemorrhage, metastases, and enlargement of the gland from external hormonal stimulation. Most of these lesions represent nonfunctioning adrenal adenomas and thus warrant a conservative management. Multi-detector computed tomography (CT) and magnetic resonance (MR) imaging are still considered highly specific and complementary techniques for the detection and characterization of adrenal abnormalities. Radiologist can establish a definitive diagnosis for most adrenal masses (i.e., carcinoma, hemorrhage) based on imaging alone. Imaging therefore can differentiate malignant lesions from those benign and avoid unnecessary aggressive management of benign lesions. The article gives an overview of the adrenal lesions and their imaging characteristics seen on CT and MR imaging.

scholarly journals Computed tomography and magnetic resonance imaging findings in infants with microcephaly potentially related to congenital Zika virus infection

2018 ◽  
Vol 51 (2) ◽  
pp. 119-122 ◽  
Author(s):  
Aníbal Araujo Alves Peixoto Filho ◽  
Simone Baltar de Freitas ◽  
Márcio Morikoshi Ciosaki ◽  
Lourenço Nogueira e Oliveira ◽  
Onildo Tavares dos Santos Júnior
Keyword(s):  
Public Health ◽  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Zika Virus ◽  
Public Health Emergency ◽  
Northeastern Brazil ◽  
Resonance Imaging ◽  
Imaging Characteristics ◽  
Pictorial Essay

Abstract The recent association between the increase in the number of neonates with microcephaly in northeastern Brazil and the outbreak of infection with the Zika virus, which has been occurring in the Americas, has been declared a public health emergency of international concern. The evidence that implicates the virus as the cause of this public health emergency has been demonstrated ever more consistently. This pictorial essay illustrates the imaging characteristics seen on computed tomography and magnetic resonance imaging scans of infants admitted to a rehabilitation hospital with a diagnosis of microcephaly and a maternal history of rash during pregnancy.

scholarly journals A Case of Myxoid Adrenocortical Neoplasm: Computed Tomography and Magnetic Resonance Imaging Characteristics

Rare Tumors ◽  
2013 ◽  
Vol 5 (3) ◽  
pp. 175-177 ◽  
Author(s):  
Hiroki Fukuhara ◽  
Vladimir Bilim ◽  
Hiroya Ohtake ◽  
Yoshie Yahagi ◽  
Yoshihiko Tomita
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Adrenocortical Neoplasm ◽  
Imaging Characteristics

Diagnostic modalities for distal radioulnar joint

2016 ◽  
Vol 42 (4) ◽  
pp. 395-404 ◽  
Author(s):  
S. Jens ◽  
T. Luijkx ◽  
F. F. Smithuis ◽  
M. Maas
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Imaging Modality ◽  
Conventional Radiography ◽  
Distal Radioulnar Joint ◽  
Resonance Imaging ◽  
Radioulnar Joint ◽  
Joint Pathology ◽  
Imaging Characteristics

The first imaging modality in patients suspected of distal radioulnar joint pathology should be conventional radiography to exclude or diagnose wrist pathology including osteoarthritis, rheumatoid arthritis, calcium pyrophosphate deposition disease, (healed) fractures, or impaction syndromes. When conventional radiography is inconclusive, high resolution 3 Tesla magnetic resonance imaging is advised. We provide a broad overview of the literature regarding the use of intra-articular contrast both with computed tomography (CTA) or magnetic resonance imaging (MRA). Conventional arthrography and unenhanced computed tomography are not indicated. This article discusses the most useful imaging techniques in terms of clinical indications, patient positioning, technical imaging requirements, and diagnostic performance in patients with suspected distal radioulnar joint pathology. Furthermore, the most prevalent pathologies are discussed, with the focus on imaging characteristics in both stable and unstable distal radioulnar joints.

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