scholarly journals Clinical evolution of Spitz nevi

2020 ◽  
Vol 27 (2) ◽  
pp. E2020213
Author(s):  
Marian Voloshynovych ◽  
Cliff Rosendahl ◽  
Galyna Girnyk ◽  
Ivanna Tsidylo ◽  
Iryna Blaha
Keyword(s):  
Differential Diagnosis ◽  
Rapid Growth ◽  
Research Method ◽  
Peripheral Zone ◽  
Skin Melanoma ◽  
Dynamic Changes ◽  
Spitz Nevus ◽  
Clinical Evolution ◽  
Different Types ◽  
Spitz Nevi

Nevus Spitz is a benign melanocytic proliferation, first described in 1948 by Sophie Spitz as a childhood melanoma. Initially, it was described as an erythematous papule or node, but further studies of the Spitz nevus proved that in 71-92% cases it is a pigmented formation. This pigmentation is often quite intense due to the rapid growth of the formation, which leads to the need for differential diagnosis with skin melanoma. After all, dermatoscopy can be used for this purpose and, when applying this research method, typically a pattern of an exploding star formed by streaks of linear pigmentation and symmetrically located pigment globules placed in the peripheral zone can be revealed. In case of non-pigmented Spitz nevus, spot vessels and reticular depigmentation are visualized. Both pigmented and non-pigmented forms of Spitz nevus in the process of evolution can regress partially or completely. Several clinical cases of different types of spitzoids, both typical and atypical, based on the non-clinical, dermatoscopic and histological diversity of the Spitz nevi, have been demonstrated in the article. Their macroscopic and dermatoscopic features as well as probable signs of dynamic changes are indicated in order to facilitate their recognition by other specialists.

SPITZ NEVUS (JUVENILE MELANOMA) IN THE PEDIATRICIANS PRACTICE: CLINICAL PICTURE, DIAGNOSIS, PROGNOSIS AND TREATMENT

2021 ◽  
Vol 100 (1) ◽  
pp. 166-172
Author(s):  
O.B. Tamrazova ◽  
◽  
V.Y. Sergeev ◽  
V.G. Nikitaev ◽  
A.V. Taganov ◽  
...  
Keyword(s):  
Clinical Picture ◽  
Spindle Cell ◽  
Special Group ◽  
Pediatric Practice ◽  
Genetic Characteristics ◽  
Spitz Nevus ◽  
Histological Picture ◽  
Spitz Nevi ◽  
Risk Degree ◽  
Benign Course

Spitz nevi (epithelioid and spindle-cell nevi) are a special group of melanocytic neoplasms with a specific clinical, dermatoscopic and histological picture. There are typical and atypical Spitz nevus. The typical Spitz nevus is more common in pediatric practice and has a benign course. Of particular interest are atypical forms that combine the characteristics of a typical Spitz nevus and melanoma. The article presents an analysis of the clinical picture, dermatoscopic, immunohistochemical, histological and genetic characteristics in various forms of Spitz nevus. The existing classification according to the metastasis risk degree is presented. The last recommendations on the tactics of managing patients with this nosology are discussed with examples of original observations.

scholarly journals The Possibilities of Magnetic Resonance Imaging in the Differential Diagnosis of Recurrent Rectal Cancer and Postoperative Scars

2017 ◽  
pp. 112-119
Author(s):  
V. V. Otochkin ◽  
E. V. Rozengauz
Keyword(s):  
Rectal Cancer ◽  
Differential Diagnosis ◽  
Size Structure ◽  
Cancer Recurrence ◽  
Resonance Imaging ◽  
Initial Examination ◽  
Postoperative Mri ◽  
Signal Characteristics ◽  
Different Types ◽  
Recurrence Of Rectal Cancer

The purpose: to develop differential diagnostic criteria  of recurrence and scarring by using various MRI techniques.Materials and methods. MRI of the pelvis was performed in 139 patients at different times after removal of colorectal cancer. Recurrence was diagnosed in 48 (34.5%) patients. The shape, size, structure, signal characteristics and the intensity of the accumulation of contrast agent in zones of recurrence and scarring were analyzed. The patients were divided into three groups with different types of postoperative MRI pattern of pelvic: patients without scarring in the pelvis, patients with a homogeneous scarring, patients with inhomogeneous scarring. The present  study was compared with MRI data performed in the early  stages after surgery.Results. The recurrences with typical MR characteristics were so easy to identify and did not require differential  diagnosis. The patients with recurrence occurred in severe  scar process in the pelvis needed for differential diagnosis.  The detection of recurrence and monitoring of patients  without scarring in the pelvis was not difficult. The greatest  difficulties arose during the initial examination of patients  with inhomogeneous scarring. The difficulties in the differential diagnosis occurred at small sizes of recurrence up to 15 mm, making it impossible to assess their structure and  signal characteristics; in the event of relapse in presacral  areas of scarring, the presence of areas of hemorrhage  in the tumor structure.Conclusions. The presence of severe scar process in the pelvis was the main reason for difficulties in detection and differential diagnosis of recurrence of rectal cancer. 

scholarly journals TOWARDS AN EFFICIENT TRAFFIC CONGESTION PREDICTION METHOD BASED ON NEURAL NETWORKS AND BIG GPS DATA

2019 ◽  
Vol 20 (1) ◽  
pp. 108-118 ◽  
Author(s):  
Wiam Elleuch ◽  
Ali Wali ◽  
Adel M. Alimi
Keyword(s):  
Traffic Congestion ◽  
Prediction Method ◽  
Traffic Information ◽  
Gps Data ◽  
Traffic Patterns ◽  
Dynamic Changes ◽  
Traffic Conditions ◽  
Congestion Prediction ◽  
Different Types ◽  
Nonparametric Techniques

ABSTRACT: The prediction of accurate traffic information such as speed, travel time, and congestion state is a very important task in many Intelligent Transportations Systems (ITS) applications. However, the dynamic changes in traffic conditions make this task harder. In fact, the type of road, such as the freeways and the highways in urban regions, can influence the driving speeds and the congestion state of the corresponding road. In this paper, we present a NNs-based model to predict the congestion state in roads. Our model handles new inputs and distinguishes the dynamic traffic patterns in two different types of roads: highways and freeways. The model has been tested using a big GPS database gathered from vehicles circulating in Tunisia. The NNs-based model has shown their capabilities of detecting the nonlinearity of dynamic changes and different patterns of roads compared to other nonparametric techniques from the literature. ABSTRAK: Ramalan maklumat trafik yang tepat seperti kelajuan, masa perjalanan dan keadaan kesesakan adalah tugas yang sangat penting dalam banyak aplikasi Sistem Pengangkutan Pintar (ITS). Walau bagaimanapun, perubahan keadaan lalu lintas yang dinamik menjadikan tugas ini menjadi lebih sukar. Malah, jenis jalan raya, seperti jalan raya dan lebuh raya di kawasan bandar, boleh mempengaruhi kelajuan memandu dan keadaan kesesakan jalan yang sama. Dalam makalah ini, kami membentangkan model berasaskan NN untuk meramalkan keadaan kesesakan di jalan raya. Model kami mengendalikan input baru dan membezakan corak trafik dinamik dalam dua jenis jalan raya yang lebuh raya dan jalan raya. Model ini telah diuji menggunakan pangkalan data GPS yang besar yang dikumpulkan dari kenderaan yang beredar di Tunisia. Model berasaskan NNs telah menunjukkan keupayaan mereka untuk mengesan ketiadaan perubahan dinamik dan pola jalan yang berbeza berbanding dengan teknik nonparametrik yang lain dari kesusasteraan.

scholarly journals Benign causes of diffusion restriction foci in the peripheral zone of the prostate: diagnosis and differential diagnosis

2016 ◽  
Vol 41 (5) ◽  
pp. 910-918 ◽  
Author(s):  
Nirjhor M. Bhowmik ◽  
Jinxing Yu ◽  
Ann S. Fulcher ◽  
Mary A. Turner
Keyword(s):  
Differential Diagnosis ◽  
Peripheral Zone ◽  
Diffusion Restriction

MANFAAT PELAKSANAAN UJI KOMPETENSI PRAMUSAJI UNTUK MENJAMIN KUALITAS PELAYANAN RESTORAN DI KOTA TOMOHON

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Miriam Mahdalena Tukunang
Keyword(s):  
Qualitative Research ◽  
Rapid Growth ◽  
Work Experience ◽  
Research Method ◽  
Descriptive Analysis ◽  
Competency Assessment ◽  
Professional Certification ◽  
Analysis Model ◽  
Qualitative Research Method

Abstract: The industry or restaurant business in Tomohon City has a very rapid growth. The purpose of this study was to analyze the benefits of competency assessment for waiters to ensure the quality of their services while working. The method used is a qualitative research method with a descriptive analysis model. The research was conducted at 10 restaurants in Tomohon City. The results showed that as a reflection or image of the restaurant, it was judged by the visiting guests, which was determined by the competence of the waiter who worked, including the expertise of the waiter in serving customers directly. This is very crucial in giving a good impression or image and giving satisfaction to customers because they feel comfortable. This of course cannot be separated from a competency or knowledge of the profession in providing a table during the service. The results also show the need for competent waiters to have qualifications that are truly recognized in their fields which can be developed through trainings whose credibility is tested and recognized by the Professional Certification Board. Professional certification aims to provide recognition of competencies that have been obtained through learning, training, as well as work experience.

Reevaluation of established and new criteria in differential diagnosis of Spitz nevus and melanoma

2018 ◽  
Vol 310 (4) ◽  
pp. 329-342 ◽  
Author(s):  
A. Ritter ◽  
M. Tronnier ◽  
B. Vaske ◽  
C. Mitteldorf
Keyword(s):  
Differential Diagnosis ◽  
Spitz Nevus ◽  
New Criteria

scholarly journals Exploring the Dynamic Organization of Random and Evolved Boolean Networks

Algorithms ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 272
Author(s):  
Gianluca d’Addese ◽  
Salvatore Magrì ◽  
Roberto Serra ◽  
Marco Villani
Keyword(s):  
Fitness Function ◽  
Interaction Network ◽  
Boolean Networks ◽  
Dynamic Regime ◽  
Point Of View ◽  
Dynamic Changes ◽  
Different Types ◽  
Critical Dynamic ◽  
Notable Increase ◽  
Dynamic Organization

The properties of most systems composed of many interacting elements are neither determined by the topology of the interaction network alone, nor by the dynamical laws in isolation. Rather, they are the outcome of the interplay between topology and dynamics. In this paper, we consider four different types of systems with critical dynamic regime and with increasingly complex dynamical organization (loosely defined as the emergent property of the interactions between topology and dynamics) and analyze them from a structural and dynamic point of view. A first noteworthy result, previously hypothesized but never quantified so far, is that the topology per se induces a notable increase in dynamic organization. A second observation is that evolution does not change dramatically the size distribution of the present dynamic groups, so it seems that it keeps track of the already present organization induced by the topology. Finally, and similarly to what happens in other applications of evolutionary algorithms, the types of dynamic changes strongly depend upon the used fitness function.

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