Papers by Nguyen Van Sang
Radiology Case Reports, 2021
Radiology Case Reports, 2021
Malignant tumors that originate from the mesenchymal tissue of the mammary gland, known as breast... more Malignant tumors that originate from the mesenchymal tissue of the mammary gland, known as breast sarcomas, are very rare and can be divided into 2 types: primary and secondary (therapy-related development). Breast sarcomas are aggressive tumors associated with a poor prognosis. Treatment options include the coordination of surgery, chemotherapy, and radiotherapy. We present a case of a 51-year-old female who presented to the hospital after noticing a palpable mass in the left breast and bloody nipple discharge. These symptoms lasted for more than 4 months. Postoperative histopathology revealed an undifferentiated pleomorphic breast sarcoma. After 8 months of treatment, the patient experienced metastasis to the brain and lungs.
BÁO CÁO KHOA HỌC VỀ NGHIÊN CỨU VÀ GIẢNG DẠY SINH HỌC Ở VIỆT NAM HỘI NGHỊ KHOA HỌC QUỐC GIA LẦN THỨ 5 - PROCEEDING OF THE 5TH NATIONAL SCIENTIFIC CONFERENCE ON BIOLOGICAL RESEARCH AND TEACHING IN VIETNAM
Exploring the genetic relationships between taxa provides important information in science. Howev... more Exploring the genetic relationships between taxa provides important information in science. However, the phylogenetic studies to investigate the ralationship of Altingia from Vietnam are limitted. Altingia excelsa is a constructive species in the tropical rainforest, this species is of cultural importance in SE Asia and Vietnam. Identifying the phylogenetic position and genetic relationship of A. excelsa from Vietnam is significant in providing important information for studies in taxonomy, economic resource, and in medicine. The present study, based on the molecular data of seven DNA regions supported the relationship within the genus Altingia. Three clades were recognized in this genus. The species A. excelsa from Lao Cai province of Vietnam was well supported as closely related to A. siamensis by molecular data, this result is congruent with morphology, and distribution.
Medical Archives, 2020
Background: Esophageal cancer is the fourth-most-common cancerous disease of the gastrointestinal... more Background: Esophageal cancer is the fourth-most-common cancerous disease of the gastrointestinal tract, with increasing incidence rates. Aim: The present study aimed to assess the outcomes of right thoracoscopic esophagectomy combined with laparotomy for esophageal cancer treatment in Vietnamese patients. Methods: A cross-sectional study of 71 patients was conducted at 108 Military Central Hospital, Hanoi, Vietnam, from January 2010 to December 2017. Results: Right thoracoscopic esophagectomy combined with laparotomy was performed in 71 patients with esophageal cancer. The mean patient age was 55.8 years, and 100% were male. Patients were diagnosed with the following cancer stages: Stage 0: 4.2%; Stage I: 14.1%; Stage II: 59.2%; and Stage III: 22.5%. The lymph node metastasis rate was 33.8%. The overall complication rate was 42.3%, which included a pneumonia rate of 12.3%, a respiratory failure rate of 7.0%, an anastomotic leak rate of 11.3%, and a chylothorax rate of 4.2%. The mean postoperative time was 16.4 days. The mean follow-up time was 21.7 months. The median overall survival was 45.7 months. The 1-year, 2-year, 3-year, and 4-year survival rates were 79.7%, 62.3%, 52.3%, and 43.6%, respectively. Conclusions: Thoracoscopic esophagectomy combined with laparotomy for esophageal cancer was a safe, effective, and minimally invasive procedure that should play a continued role in cancer treatment.
Annals of Plastic Surgery, 2008
ABSTRACT A preoperative abdominal wall study was conducted using a multidetector scanner in 162 w... more ABSTRACT A preoperative abdominal wall study was conducted using a multidetector scanner in 162 women who had undergone breast reconstruction with abdominal perforator flaps. A map of the abdominal perforator vessels dependent on the deep inferior epigastric artery was created. In the first 36 cases, anatomic dissection of all perforators was performed during surgery. The outcome was then compared with the radiologic findings. In the following 126 cases, the perforator vessel chosen preoperatively by the multidetector scanner was located and dissected directly. In the first 36 cases, an absolute correlation was observed between the radiologic information and intraoperative findings. In the following 126 cases, surgery time and the rate of postoperative complications decreased significantly. The multidetector scanner provides valuable preoperative information enabling identification of the most suitable perforator in view of its caliber, location, course, and anatomic relationships. Once located, we can proceed directly to its dissection during surgery, making it a faster and safer technique.
Journal of Environmental Science and Engineering A, 2017
The integration of GNSS (Global Navigation Satellite System) and INS (Inertial Navigation System)... more The integration of GNSS (Global Navigation Satellite System) and INS (Inertial Navigation System) using IMU (Inertial Measurement Unit) is now widely used for MMS (Mobile Mapping System) and navigation applications to seamlessly determine position, velocity and attitude of the mobile platform. With low cost, small size, ligh weight and low power consumtion, the MEMS (Micro-Electro-Mechanical System) IMU and low cost GPS (Global Positioning System) receivers are now the trend in research and using for many applications. However, researchs in the literature indicated that the the performance of the low cost INS/GPS systems is still poor, particularly, in case of GNSS-noise environment. To overcome this problem, this research applies analytic contrains including non-holonomic constraint and zero velocity update in the data fusion engine such as Extended Kalman Filter to improve the performance of the system. The benefit of the proposed method will be demonstrated through experiments and data analysis.
Check List, 2014
A revised and updated checklist of the herpetofauna of the Krau Wildlife Reserve (KWR), Pahang is... more A revised and updated checklist of the herpetofauna of the Krau Wildlife Reserve (KWR), Pahang is presented, which includes 61 species of amphibians and 65 species of reptiles. Five species of amphibians are listed under revised names i.e. Hylarana labialis, H. picturata, Ansonia latiffi, Microhyla mantheyi and Rhacophorus norhayatae; and two species are listed as new locality records for KWR: Hylarana cf. siberu and Theloderma licin. The amphibians and reptiles recorded in KWR are approximately 56% and 22% of the total number of species recorded from Peninsular Malaysia, respectively.
Quarterly Journal of the Royal Meteorological Society, 2009
In this paper we seek and obtain a basic understanding of tropical cyclone intensification in thr... more In this paper we seek and obtain a basic understanding of tropical cyclone intensification in three dimensions when precipitation and evaporative-cooling (warm rain) processes are included. Intensification with warm rain physics included is found to be dominated by highly localized deep convective structures possessing strong cyclonic vorticity in their cores-dubbed 'Vortical Hot Towers' (VHTs). Unlike previous studies, the findings herein suggest an intensification pathway that is distinct from the 'evaporation-wind' feedback mechanism known as wind-induced surface heat exchange (WISHE), which requires a positive feedback between the azimuthal-mean boundary-layer equivalent potential temperature and the azimuthal-mean surface wind speed underneath the eyewall of the storm. Intensification from a finite-amplitude initial vortex is shown to not require this evaporation-wind feedback process. Indeed, when the surface wind speed in the sea-to-air vapour fluxes is capped at a nominal (trade-wind) value, the vortex still intensifies by the same pathway identified in the main experiments via the generation of locally buoyant VHTs and the near-surface convergence that the VHTs induce within the boundary layer. The present findings and interpretations challenge the prevailing view that tropical cyclones are premier examples of vortical systems arising from WISHE. Given the potential significance on our understanding of the dynamics of hurricanes, and given the limitations of the present modelling framework, further tests of these predictions are advocated. Copyright
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Papers by Nguyen Van Sang