Search results for "Lymphatic"
showing 10 items of 1179 documents
Burkitt's lymphoma : a child s case presenting in the maxilla. Clinical and radiological aspects.
2006
Burkitt´s lymphoma (BL) is a neoplasm which, despite its very aggressive behaviour is potentially curable. It typically affects the paediatric population. BL belongs to the non-Hodgkin lymphomas group, and is the first human tumour undoubtedly related to a viral origin (Epstein-Barr virus). Two main clinical subtypes are recognized: endemic or African type, and sporadic type; HIV associated BL constitutes a third type. Although common in endemic BL, maxillary involvement is rare in sporadic cases. This, together with the clinical lack of specificity associated to this location, makes diagnosis difficult. New chemotherapeutic protocols achieve a high survival rate. Most important prognostic …
Neutral pH and low–glucose degradation product dialysis fluids induce major early alterations of the peritoneal membrane in children on peritoneal di…
2018
WOS: 000439138700024 PubMed ID: 29776755 The effect of peritoneal dialysates with low-glucose degradation products on peritoneal membrane morphology is largely unknown, with functional relevancy predominantly derived from experimental studies. To investigate this, we performed automated quantitative histomorphometry and molecular analyses on 256 standardized peritoneal and 172 omental specimens from 56 children with normal renal function, 90 children with end-stage kidney disease at time of catheter insertion, and 82 children undergoing peritoneal dialysis using dialysates with low-glucose degradation products. Follow-up biopsies were obtained from 24 children after a median peritoneal dial…
Stimulation of regional lymphatic and blood flow by epicutaneous oxazolone.
2002
The application of the epicutaneous antigen oxazolone results in persistent induration and erythema; however, the relative changes in lymph and blood flow in the inflammatory skin are largely unknown. To define the contribution of lymph and blood flow to the clinical appearance of cutaneous inflammation, we studied the sheep ear after the application of oxazolone. As a model for the study of these changes, the sheep ear had several experimental advantages: 1) a simplified superficial vascular network, 2) defined lymphatic drainage, and 3) an avascular and alymphatic cartilaginous barrier. Lymph flow was continuously monitored by cannulation of the prescapular efferent lymph duct. Blood flo…
Gastric and gingival localization of mucosa-associated lymphoid tissue (MALT) lymphoma. An immunohistochemical, virological and clinical case report.
1999
Non-Hodgkin's lymphomas (NHL) of the mucosa-associated lymphoid tissue (MALT) are characterized by their mucosal and glandular tissue localization. The case described here falls into the European-American classification of a low-grade B-cell lymphoma of the MALT type, with a gingival lesion 2 years after a gastric lesion. The pathogenetic mechanisms of NHL in oral MALT and the diagnosis and treatment are discussed.
Changes in pulmonary calcitonin gene-related peptide and protein gene product 9.5 innervation in rats infected with Mycoplasma pulmonis.
1996
Changes in the expression of calcitonin gene-related peptide (CGRP) and polyneural protein gene product 9.5 (PGP) in hilar peribronchial innervation was investigated by immunohistochemistry in specific pathogen-free rats chronically infected with Mycoplasma pulmonis. Image analysis of immunostained sections revealed a reduction of approximately 62% in the amount of CGRP- and PGP-immunoreactive innervation of the peribronchial area in the infected animals. The portion of the total bronchial perimeter occupied by bronchus-associated lymphoid tissue was increased six-fold. The decrease in the CGRP-immunoreactive area could be the result either of an enhanced CGRP release or of a loss of nerve …
Prognosis in lower lip squamous cell carcinoma: assessment of tumor factors.
1998
We studied a consecutive series of 54 cases of lower lip squamous cell carcinoma (LLSCC) in order to identify any variables which might predict the development of lymph node metastases. The cases were divided into 38 tumors without metastases (group I) and 16 tumors with lymph node metastases (group II). The following factors were investigated: tumor size, histologic grading maximal thickness, perineural invasion, DNA ploidy and PCNA expression. In conclusion, we found that LLSCC greater than 2 cm in diameter, with histological grading G3-G4, thickness of more than 6 mm, DNA aneuploidy and high PCNA expression (PCNA LI > 0.48), were at high risk for the development of lymph node metastases.
Lymphoproliferative disorders in Sotos syndrome: Observation of two cases
1996
Sotos syndrome is included among the overgrowth disorders, most of which have an increased risk of neoplasms. Sotos syndrome does not appear to be related to a specific tumor type, but rather to the development of solid tumors of ectodermal or mesodermal origin in general. We report on two Sotos syndrome patients who developed a non-Hodgkin lymphoma and an acute lymphoblastic leukaemia, respectively. Our experience suggests that there may exist a high frequency of lymphoproliferative disorders in Sotos syndrome, and points out the importance of a long-term follow-up of Sotos syndrome patients, to detect a possible neoplastic evolution. ©1996 Wiley-Liss, Inc.
Time sequence and site of fluid accumulation in experimental neurogenic pulmonary edema.
1976
The initial phase of pulmonary edema development following intracranial pressure elevation was studied by means of transmission electron microscopy. Using perfusion fixation and application of a blood tracer (HRP horseradish peroxidase) the time sequence and site of fluid leakage out of pulmonary vessels was demonstrated: - passage of edema fluid through intercellular clefts of alveolar capillary endothelium - edema accumulation in alveolar interstitial tissue - draining of edema fluid from the alveolar septum to the interstitium of terminal bronchioli and to lymphatic vessels. An early interepithelial fluid leakage out of the alveolar wall remains questionable.
Evaluation by Ultrasound of Abdominal Lymphadenopathy in Chronic Hepatitis C
1999
Objective: Abdominal ultrasound has shown a frequent association between abdominal lymphadenopathy (LA) and chronic liver disease, but contradictory data have been reported on its relationship with the main parameters of hepatic function. The aim of this study was to correlate the prevalence of LA in patients who were chronic hepatitis-anti-hepatitis C virus positive prospectively followed-up over the last 3 years and its relationship with biochemical and histological data. Methods: 136 RIBA II confirmed positive patients with ALT levels >2N were included. None of these had been or was at the time of study on interferon treatment. Ultrasound was performed using a Toshiba SSA 240 A apparatus…
Resection of the mesopancreas (RMP): a new surgical classification of a known anatomical space
2007
Abstract Background Prognosis after surgical therapy for pancreatic cancer is poor and has been attributed to early lymph node involvement as well as to a strong tendency of cancer cells to infiltrate into the retropancreatic tissue and to spread along the peripancreatic neural plexuses. The objective of our study was to classify the anatomical-surgical layer of the mesopancreas and to describe the surgical principles relevant for resection of the mesopancreas (RMP). Immunohistochemical investigation of the mesopancreatic-perineural lymphogenic structures was carried out with the purpose of identifying possible routes of metastatic spread. Methods Resection of the mesopancreas (RMP) was per…