4,305 research outputs found
Retroperitoneal smooth muscle tumor of uncertain malignant potential after hysterectomy: a case report
<p>Abstract</p> <p>Introduction</p> <p>Smooth muscle tumors of uncertain malignant potential represent a histologically heterogeneous group of uterine smooth muscle tumors that cannot be diagnosed as either benign or malignant. Smooth muscle tumors of uncertain malignant potential are usually clinically benign, but should be considered tumors of low malignant potential because they can occasionally recur or metastasize to distant sites.</p> <p>Case presentation</p> <p>We report the case of a 62-year-old Mongol woman diagnosed with a retroperitoneal smooth muscle tumor of uncertain malignant potential and lung metastasis, with a history of prior hysterectomy. The case was initially misdiagnosed as retroperitoneal sarcoma, and our patient received chemotherapy. However, no interval change in the size of the retroperitoneal mass and metastatic lung nodules was seen over a period of at least five years. She underwent partial resection of the retroperitoneal mass for the purposes of debulking and establishing a histopathological diagnosis. The diagnosis of the retroperitoneal mass was then confirmed as a smooth muscle tumor of uncertain malignant potential.</p> <p>Conclusion</p> <p>Smooth muscle tumors of uncertain malignant potential have an unpredictable clinical course, and relapses generally appear to occur after a long disease-free interval of up to several years. Therefore, patients diagnosed with smooth muscle tumors of uncertain malignant potential should receive long-term follow-up.</p
Management of Anaphylactic Shock During Intravenous Fluorescein Angiography at an Outpatient Clinic
We report the proper management of a severe adverse reaction of anaphylactic shock during intravenous fluorescein angiography at an outpatient clinic. A 72-year-old male developed the severe, life-threatening complication after intravenous injection of sodium fluorescein dye for retinal angiography. Three minutes after receiving an intravenous injection of fluorescein, the patient developed syncope, apnea and circulatory shock. Fortunately, he recovered without any neurologic sequelae after immediate intensive resuscitation with fluid and inotropic support. We highlight the occurrence of anaphylactic shock as a potentially fatal complication during intravenous fluorescein angiography. Thus, one should be alert to the possibility of this adverse event and be prepared to deal with it when fluorescein angiography is performed. When it happens, immediate intensive medical resuscitation is essential to minimize morbidity and to avoid mortality
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Diffusion coefficients of isopropyl alcohol in binary and multicomponent gas systems involving air and argon
Diffusion coefficients for isopropyl alcohol-air, isopropyl
alcohol-argon, isopropyl alcohol-mixture of argon 1
: air 1, isopropyl
alcohol-mixture of argon 1
: air 2, and carbon tetrachloride-air system were determined, using an Arnold cell technique.
The measured
carbon tetrachloride-air system diffusion coefficient was compared
with previously measured values to verify the accuracy and reproducibility of the present experimental technique.
The following diffusion coefficients were obtained at 25°C.
D of CC1₄ - air = 0.08002 cm²/sec
D of CH₃CHOHCH₃ - air = 0.10626 cm²/sec
D of CH₃CHOHCH₃ - argon = 0.08928 cm²/sec
D of CH₃CHOHCH₃ - argon : air [subscript](1 : 1 in volume) = 0.09425 cm²/sec
D of CH₃CHOHCH₃ - argon : air [subscript](1 : 2 in volume) = 0.09804 cm²/se
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Neural Correlates of Repetition Priming: A Coordinate-Based Meta-Analysis of fMRI Studies.
Repetition priming is a form of implicit memory, whereby classification or identification of a stimulus is improved by prior presentation of the same stimulus. Repetition priming is accompanied with a deceased fMRI signal for primed vs. unprimed stimuli in various brain regions, often called "repetition suppression," or RS. Previous studies proposed that RS in posterior regions is associated with priming of perceptual processes, whereas RS in more anterior (prefrontal) regions is associated with priming of conceptual processes. To clarify which regions exhibit reliable RS associated with perceptual and conceptual priming, we conducted a quantitative meta-analysis using coordinate-based activation likelihood estimation. This analysis included 65 fMRI studies that (i) employed visual repetition priming during either perceptual or conceptual tasks, (ii) demonstrated behavioral priming, and (iii) reported the results from whole-brain analyses. Our results showed that repetition priming was mainly associated with RS in left inferior frontal gyrus and fusiform gyrus. Importantly, RS in these regions was found for both perceptual and conceptual tasks, and no regions show RS that was selective to one of these tasks. These results question the simple distinction between conceptual and perceptual priming, and suggest consideration of other factors such as stimulus-response bindings
Improved Real-Time Monocular SLAM Using Semantic Segmentation on Selective Frames
Monocular simultaneous localization and mapping (SLAM) is emerging in
advanced driver assistance systems and autonomous driving, because a single
camera is cheap and easy to install. Conventional monocular SLAM has two major
challenges leading inaccurate localization and mapping. First, it is
challenging to estimate scales in localization and mapping. Second,
conventional monocular SLAM uses inappropriate mapping factors such as dynamic
objects and low-parallax areas in mapping. This paper proposes an improved
real-time monocular SLAM that resolves the aforementioned challenges by
efficiently using deep learning-based semantic segmentation. To achieve the
real-time execution of the proposed method, we apply semantic segmentation only
to downsampled keyframes in parallel with mapping processes. In addition, the
proposed method corrects scales of camera poses and three-dimensional (3D)
points, using estimated ground plane from road-labeled 3D points and the real
camera height. The proposed method also removes inappropriate corner features
labeled as moving objects and low parallax areas. Experiments with eight video
sequences demonstrate that the proposed monocular SLAM system achieves
significantly improved and comparable trajectory tracking accuracy, compared to
existing state-of-the-art monocular and stereo SLAM systems, respectively. The
proposed system can achieve real-time tracking on a standard CPU potentially
with a standard GPU support, whereas existing segmentation-aided monocular SLAM
does not
Effect of Total Leaf Numbers on the Growth and Fruit Quality in Muskmelon Plants Showing Leaf Yellowing Symptoms
This study was conducted to evaluate the influence of total leaf
numbers on the growth, net formation of fruits, and occurrence of
leaf yellowing symptoms (LYS) in muskmelon plants. The growth
and development of LYS on muskmelon plants having 25, 30, and
35 fully expanded leaves on the vine were compared to those of the
control plant having 20 leaves. Plant height, leaf area, root fresh
weight, and root dry weight increased as the number of leaves
increased. Plants with 35 leaves showed the greatest plant growth.
Net photosynthetic rate was positively related to increasing leaf
numbers with plants having over 25 leaves showing the greatest
photosynthetic rates. On the other hand, there were no significant
differences in chlorophyll content and root activity among treatments
with different leaf numbers. The ratio of LYS infection was also
greater in plants having 25-30 leaves, than in those having leaf
numbers. Plants with different leaf numbers and LYS infection
showed a variation in fruit quality, although LYS did not
significantly affect fruit quality except net index. The plants having
20 leaves that showed LYS developed fruits that had significantly
smaller flesh (mesocarp) thickness than, the plants having greater numbers of leaves. The higher sugar contents of fruits were found
in the plants having 35 leaves whether they showed LYS (12.1°Bx)
or not (12.5°Bx). Therefore, leaving more than 25 healthy leaves per
plant was recommended for minimizing damage from LYS.OAIID:oai:osos.snu.ac.kr:snu2015-01/104/0000027607/11ADJUST_YN:NEMP_ID:A075898DEPT_CD:517CITE_RATE:0FILENAME:(이희주)effect_of_total_leaf_numbers_on_the_growth_and_fruit_quality_in_muskmelon_plants_showing_leaf_yell··.pdfDEPT_NM:식물생산과학부CONFIRM:
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