Search results for " Node"

Pathological Evaluation of Mesocolic Resection Quality and Ex Vivo Methylene Blue Injection

2012

BACKGROUND: Although the National Quality Forum has endorsed the harvest of ≥12 lymph nodes as a standard quality indicator for colon cancer surgery, this minimum quantity is not reached in many centers. OBJECTIVE: The aim of this study was to assess the impact of the implementation of a mesocolon evaluation pathological protocol and ex vivo arterial methylene blue injection on the number of nodes harvested after colon cancer resection. DESIGN: A prospective series was compared with a historical group. SETTINGS: This study was conducted by a specialized colorectal multidisciplinary team at a tertiary teaching hospital. PATIENTS: From June 2009 to December 2009, all the specimens after colon…

Can sentinel node biopsy be safely omitted in thin melanoma? Risk factor analysis of 1272 multicenter prospective cases

2019

Background: The indication to sentinel node biopsy (SNB) for thin melanomas (Breslow <1 mm) is still subject to controversies. The aim of this paper is to review all SNB performed for thin melanoma and to analyze factors related to lymphatic metastasis. Moreover, the diagnostic performance of the 5th, 6th, 7th and 8th AJCC classifications for cutaneous melanoma were investigated. Methods: All sentinel node biopsies performed for thin melanomas were selected from a multicentre prospectively-collected database. For each patient the following was collected: age, sex, date of treatment, site of primary melanoma, histopathologic features (Breslow, Clark, number of mitoses/mm2 , presence of ul…

Sentinel lymph node biopsy in malignant melanoma of the head and neck

2018

Abstract Background The aim of this retrospective study was to investigate sentinel lymph node biopsy in patients with head and neck melanoma. Materials and methods Patients who underwent SLNB between 2010 and 2016 were comprised. Epidemiological, radiological, and surgical data were collected and compared to histological findings. Patients who underwent primary complete lymph node dissection were excluded. Results 74 patients underwent SLNB during this period. The most common tumor localizations were the cheek (20.4%) and ears (20.4%). Overall, 256 sentinel lymph nodes (SLN) were detected and removed, most frequently in Robbins-levels IIA and IIB as well as in the surrounding of the paroti…

A Proposal for Novel Standards of Histopathology Reporting for D3 Lymphadenectomy in Right Colon Cancer: The Mesocolic Sail and Superior Right Colic …

2020

Background Strong agreement exists concerning the standards of pathologic reporting for total mesorectal excision and complete mesocolic excision. It represents a quality standard that correlates with survival. However, no agreed standards of reporting are available to define D3 lymphadenectomy for right colectomy. Objective The purpose of this study was to define anatomopathological standards of specimen quality obtained from the surgical specimen when an oncologic right hemicolectomy with D3 lymphadenectomy has been correctly performed. Design This study was conducted in 2 different phases. The first part consisted of a cadaver-based study of right colon anatomy, and the second part consi…

Sudden infant death caused by a ruptured coronary aneurysm during acute phase of atypical Kawasaki disease

2001

This article describe's a case of atypical Kawasaki disease (AKD) with lack of typical clinical signs and rapid fatal course in a 2-month-old infant, who 1 week before hospitalization demonstrated rhinitis, coughing without fever, and later conjunctival hyperemia and allergic exanthema on chest and arms. On admittance, labwork highlighted the following: leukocytosis, thrombocytosis, elevated sedimentation rate, and positive C-reactive protein. General conditions remained mediocre for 7 days until sudden death occurred. The autopsy confirmed death caused by cardiac tamponade caused by a ruptured inflammated aneurysm of the left anterior descending coronary artery. We believe that the current…

Partial or complete mesohepatectomy combined with resection of the hilar bifurcation in cases of Klatskin tumors: a reasonable strategy?

2009

Nerves projecting from the intrinsic cardiac ganglia of the pulmonary veins modulate sinoatrial node pacemaker function

2013

Rationale: Autonomic nerves from sinoatrial node (SAN) ganglia are known to regulate SAN function. However, it is unclear whether remote pulmonary vein ganglia (PVG) also modulate SAN pacemaker rhythm. Objective: To investigate whether in the mouse heart PVG modulate SAN function. Methods and Results: In hearts from 45 C57BL and 7 Connexin40+/GFP mice, we used tyrosine-hydroxylase (TH) and choline-acetyltransferase (ChAT) immunofluorescence labeling to characterize adrenergic and cholinergic elements, repectively, within the PVG and SAN. PVG project postganglionic nerves to the SAN. TH and ChAT stained nerves, enter the SAN as an extensive, dense mesh-like neural network. Neurons in PVG are…

Echinostoma caproni (Trematoda): differential in vivo cytokine responses in high and low compatible hosts.

2011

In order to investigate the factors determining the expulsion of intestinal trematodes, we have analyzed the in vivo cytokine responses at several levels and the local responses against Echinostoma caproni (Trematoda) in two host species displaying different compatibility with the parasite. The response of the high compatible host (mice) is characterized by a mixed Th1/Th2 phenotype in the spleen, Peyer's patches and mesenteric lymph nodes. At the intestine, a marked Th1 response with a marked increase of IFN-γ together with elevated number of mucosal neutrophils and expression of induced nitric oxide synthase were observed. The responses in the host of low compatibility (rats) with the par…

The role of accessory cells in polyclonal T cell activation. I. Both induction of interleukin 2 production and of interleukin 2 responsiveness by con…

1983

Recent studies from other laboratories have shown that concanavalin A (Con A) acts at two separate steps in polyclonal T cell activation: interleukin 2 (IL2) production, and induction of responsiveness to IL2. Using a combination of techniques for the depletion of accessory cells from lymph node T cells, we have investigated which of these steps, if not both, is responsible for the known requirement for accessory cells in the Con A response. It was found that with increasing T cell purification, first the ability is lost to produce sufficient levels of endogenous IL2, whereas induction of IL2 responsiveness can still take place. Further removal of accessory cells however yields a population…

The cost of an action potential.

2000

Neuronal modules, or 'cell-assemblies', comprising millions of mutually interconnected cells have been postulated to form the basis of many functions of the brain, such as mood, sleep, hunger, vigilance, and more. Depending on the extent of the module, neurocommunication in cell-assemblies might exceed metabolic resources. A medium-size (10000 neurons) module would require at least 10 J per l of brain, based on a calculated cost of an isolated action potential (AP) of 10(11)-10(12) molecules of ATP per cm(2) of cell membrane, with an absolute minimum of 10(6) ATP at a node of Ranvier. The figure matches the cost of depolarizing the unmyelinated axon of the large monopolar cell in the blowfl…