The three-dimensional structure of capillary vessels in the human palatine tonsil using corrosion casting technique was investigated. The postcapillary venules and arterioles were distinguishable from the nuclear impressions on their walls. The configuration of vessels around cryptal micropores is similar to images obtained by a recently developed cryptscope. The palatine tonsil has no efferent...

Leukocytoclastic vasculitis (LCV) usually presents palpable purpura characterized by inflammation of vessel walls and fragmentation of nuclei. Various conditions can cause LCV, and it can be induced by influenza A virus infection. We report a 2-yr-old Korean girl who presented palpable purpuric and hemorrhagic lesions with fever. She was diagnosed as LCV by skin biopsy, and influenza A virus wa...

Fungal wilt diseases are a threat to global food safety. Previous studies in perennial crops showed that xylem vessel diameter affects disease susceptibility. We tested the hypothesis that xylem vessel diameter impacts occlusion processes and pathogen compartmentalization in Vitis vinifera L. We studied the interaction between four grape commercial cultivars with the vascular wilt pathogen Phae...

The localization of acid phosphatase during xylem development has been examined in the bean, Phaseolus vulgaris. The azo dye, the final reaction product, is initially prominent in the dictyosomes, vesicles apparently participating in secondary wall formation, and in the middle lamella of the young vessel element. Final reaction particles are also present in mitochondria, chloroplasts, and certa...

BACKGROUND Inflammatory vasculopathies, ranging from the vasculitides (Takayasu arteritis, giant cell arteritis, and polyarteritis nodosa) to atherosclerosis, display remarkable target tissue tropisms for selected vascular beds. Molecular mechanisms directing wall inflammation to restricted anatomic sites within the vascular tree are not understood. We have examined the ability of 6 different h...

INTRODUCTION We assessed the acoustic transmission, image quality, and vessel integrity of the Blue Phantom™ 2 Vessel Original Ultrasound Training Model with repeated use. METHODS The study consisted of two phases. During the first phase, a portion of the Blue Phantom™ rubber matrix (without a simulated vessel) was placed over a two-tiered echogenic structure and was repeatedly punctured with...

although the etiology of varicose veins remains unknown, recent studies have focused on endothelial cell integrity and function because the endothelium regulates vessel tone and synthesizes many pro- and anti-inflammatory factors. the aim of this study was to investigate the evidence involving the endothelium in the development of varicose vein disease. in addition, tissue remodeling was invest...

The perivascular epithelioid cell (PEC) has been proposed to be the proliferating cell type in a group of tumors known as PEComas. The histogenesis of PEComas is one of the most mysterious aspects of pathology. Hypothesis on its precursor are many, including a cell from blood vessel walls or the myoblast. In the current report, we review many morphologic, clinical, ultrastructural, molecular an...

Eighteen digital subtraction angiography (DSA) examinations were retrospectively evaluated for factors that led to their erroneous interpretation. Overlapping vessels obscured pathologic conditions in five cases. In four cases the lesions were not adequately profiled by the DSA projections. Eight lesions were rendered inconspicuous by misregistration artifacts attributable to motion, either fro...

0.032-in MRIG (Right column), and the newly-designed 0.014-in MRIG (Left columna). A: The scheme of the two MRIGs. B: Photographies of the two MRIGs. C: The SNR maps of two MRIGs; D&E: The segittal and axial protonweighed images of the balloon-inflated target vessel walls with the 0.032-in MRIG and 0.014 MRIG, respectively. 0.032-in MRIG New 0.014-in MRIG DEVELOPMENT OF AN 0.014-IN MAGNETIC RES...