scholarly journals CT angiography and MRI of hand vascular lesions: technical considerations and spectrum of imaging findings

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Alain G. Blum ◽  
Romain Gillet ◽  
Lionel Athlani ◽  
Alexandre Prestat ◽  
Stéphane Zuily ◽  
...  
Keyword(s):  
Doppler Ultrasonography ◽  
Spindle Cell ◽  
State Of The Art ◽  
Vascular Malformations ◽  
Vascular Lesions ◽  
Systemic Diseases ◽  
Contrast Enhanced ◽  
Vascular Compromise ◽  
Exposure To Trauma ◽  
Technical Considerations

AbstractVascular lesions of the hand are common and are distinct from vascular lesions elsewhere because of the terminal vascular network in this region, the frequent hand exposure to trauma and microtrauma, and the superficial location of the lesions. Vascular lesions in the hand may be secondary to local pathology, a proximal source of emboli, or systemic diseases with vascular compromise. In most cases, ischaemic conditions are investigated with Doppler ultrasonography. However, computed tomography angiography (CTA) or dynamic contrast-enhanced magnetic resonance angiography (MRA) is often necessary for treatment planning. MR imaging is frequently performed with MRA to distinguish between vascular malformations, vascular tumours, and perivascular tumours. Some vascular tumours preferentially affect the hand, such as pyogenic granulomas or spindle cell haemangiomas associated with Maffucci syndrome. Glomus tumours are the most frequent perivascular tumours of the hand. The purpose of this article is to describe the state-of-the-art acquisition protocols and illustrate the different patterns of vascular lesions and perivascular tumours of the hand.

SPINDLE CELL LIPOMA MASQUERADING AS MIXED PYOLARYNGOCELE : A RARE CASE REPORT

2020 ◽  
Vol VOLUME 8 (ISSUE 1) ◽  
pp. 47-51
Author(s):  
Vineet Narula
Keyword(s):  
Rare Case ◽  
Spindle Cell ◽  
Spindle Cell Lipoma ◽  
Computed Tomographic ◽  
Contrast Enhanced ◽  
Rare Case Report ◽  
Shoulder Region ◽  
Cervical Approach ◽  
Posterior Neck ◽  
Keywords Lipoma

ABSTRACT Spindle Cell Lipoma (SCL) is an uncommon benign tumor of adipose tissue that is usually super􀃶cially located in the posterior neck, back and shoulder region. We report a rare case of SCL in a 39 years old male presenting as neck swelling with c/o stridor and dysphagia. The contrast enhanced computed tomographic scan of neck showed an external and internal part of the swelling traversing through the thyrohyoid membrane suggestive of Mixed Pyolaryngocele. The tumor was excised by a trans-cervical approach but the post operative histopathology was found to be spindle cell Lipoma. We report this case due to its atypical presentation and location. Keywords: Lipoma, Spindle cell, Pyolaryngocele

scholarly journals MRA Mapping and Selective Embolization of a Large Uterine Cavity Pseudoaneurysm at 20 Weeks of Gestation

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Jean V. Storey ◽  
Timothy B. Dinh ◽  
Deirdre M. McCullough ◽  
Steven H. Craig ◽  
Christian L. Carlson
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Mortality Risk ◽  
Vascular Malformations ◽  
Uterine Cavity ◽  
Massive Hemorrhage ◽  
Fetal Mortality ◽  
Intravenous Contrast ◽  
Selective Embolization ◽  
Contrast Enhanced

Antepartum uterine cavity pseudoaneurysm rupture can cause massive hemorrhage with high maternal and fetal mortality risk. Invasive placentation can predispose to vascular malformations. We present a novel use of macrocyclic intravenous contrast-enhanced magnetic resonance angiography for preprocedure planning followed by selective low radiation embolization of a uterine cavity pseudoaneurysm in the setting of invasive placentation at 20 weeks of gestation. To our knowledge, this is the first reported case of uterine cavity pseudoaneurysm successfully mapped with MRA and treated with embolization at 20 weeks of gestation.

Dynamic contrast-enhanced (DCE) imaging: state of the art and applications in whole-body imaging

2021 ◽  
Author(s):  
Domenico Albano ◽  
Federico Bruno ◽  
Andrea Agostini ◽  
Salvatore Alessio Angileri ◽  
Massimo Benenati ◽  
...  
Keyword(s):  
State Of The Art ◽  
Whole Body ◽  
Whole Body Imaging ◽  
Body Imaging ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced

scholarly journals Adaptive Image Enhancement Using Entropy-Based Subhistogram Equalization

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Liyun Zhuang ◽  
Yepeng Guan
Keyword(s):  
Image Enhancement ◽  
Dynamic Range ◽  
State Of The Art ◽  
Image Database ◽  
Input Image ◽  
Public Image ◽  
Contrast Enhanced ◽  
Quantitative Results ◽  
The Mean ◽  
Visual Assessments

A novel image enhancement approach called entropy-based adaptive subhistogram equalization (EASHE) is put forward in this paper. The proposed algorithm divides the histogram of input image into four segments based on the entropy value of the histogram, and the dynamic range of each subhistogram is adjusted. A novel algorithm to adjust the probability density function of the gray level is proposed, which can adaptively control the degree of image enhancement. Furthermore, the final contrast-enhanced image is obtained by equalizing each subhistogram independently. The proposed algorithm is compared with some state-of-the-art HE-based algorithms. The quantitative results for a public image database named CVG-UGR-Database are statistically analyzed. The quantitative and visual assessments show that the proposed algorithm outperforms most of the existing contrast-enhancement algorithms. The proposed method can make the contrast of image more effectively enhanced as well as the mean brightness and details well preserved.

Is There an Association Between Hemangioma and Syndromes With Dysmorphic Features?

PEDIATRICS ◽  
1991 ◽  
Vol 88 (6) ◽  
pp. 1257-1267
Author(s):  
A. Jay Burns ◽  
Lawrence C. Kaplan ◽  
John B. Mulliken
Keyword(s):  
Aortic Arch ◽  
Vascular Malformations ◽  
Vascular Anomalies ◽  
Vascular Lesions ◽  
Dysmorphic Features ◽  
Vascular Birthmarks ◽  
Neonatal Tumor ◽  
Nevus Flammeus ◽  
Genitourinary Defects

Most vascular birthmarks can be categorized, based on clinical and cellular criteria, as either (1) a hemangioma, or (2) a malformation, or (3) a macular stain. Macular stains are commonly seen in newborns, and they consist of faint vascular stains of the glabella, eyelids, and nuchal region called "nevus flammeus," "stork bite," "salmon patch," etc. Unfortunately, the term "hemangioma" is frequently applied to all three types of cutaneous vascular lesions. Usually, these disparate vascular anomalies are listed in association with various malformative syndromes and are generically labeled "hemangioma." This study attempts to define accurately the specific vascular anomalies seen in children born with syndromes with dysmorphic features. This review of five standard textbooks of genetics showed that the majority of vascular anomalies reported in syndromic newborns are not hemangiomas. Rather, they are macular stains, and the vast majority of these fade with time. Congenital telangiectasias and other vascular malformations (capillary, lymphatic, venous, arterial, and combinations thereof) also occur in association with dysmorphic syndromes. contrast, hemangioma, the most common neonatal tumor, is seen only incidentally with rare dysmorphic conditions. Specifically, hemangioma was found to occur only in association with midline (sternal, abdominal) clefting, right-sided aortic arch coarctation, and with a constellation of sacral and genitourinary defects.

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