Search results for "ichen"
showing 8 items of 338 documents
DNA integrity in diagnosis of premalignant lesions
2020
Background Carcinogenesis is a dynamic process which traditional biopsying can not keep up with. Saliva as fluid in the vicinity of the tumor can offer better insights to this process. This study aimed to identify the accuracy of salivary DNA integrity index in differentiating between oral premalignant lesions and oral cancer. Material and Methods This phase II diagnostic test accuracy study included 93 patients divided into three groups: 30 oral cancer patients, 33 patients with oral premalignant lesions divided into 21 oral lichen planus patients and 12 patients with leukoplakia and 30 normal individuals who acted as controls. Oral rinse was collected from all participants and they all un…
Clinicopathological analysis of oral mucous autoimmune disease : a 27-year study
2008
Made available in DSpace on 2022-04-28T20:39:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-02-01 Objectives: The aim of the present study was to analyze the main clinical and histopathological features of autoimmune diseases with oral manifestations such as oral lichen planus (OLP); mucous membrane pemphigoid (MMP); pemphigus vulgaris (PV) and erythema multiforme (EM). Study design: Retrospective review of 5770 files from the Oral Pathology Laboratory of São José dos Campos Dental School, São Paulo State University (UNESP) comprising a 27-year period from 1974 to 2000. Results: The cases accounted for 64 (1.10%) of 5770 anatomopathological examinations performed over the study p…
Topic tacrolimus, alternative treatment for oral erosive lichen planus resistant to steroids : a case report
2006
The lichen planus is a mucocutaneous disease with unknown etiology and auto-immune pathogenia. There have been three variants of lichen planus: the reticular, the plaque-like and the atrophic-erosive lesions. It?s a chronic disease with acute relapses that generally affects more frecuently to women from the fourties. The diagnostic is based on the clinic identification of the lesions joined with the histopathologic study (basal cells hidropic degeneration, linfoplasmocitic infiltration and absence of displasy signs). The great number of therapeutic options are explained for its high prevalency (0.5-2%), its recurrence and its risk for malignant transformation. We present a case of oral eros…
Oral lichenoid disease as a premalignant condition : the controversies and the unknown
2009
We grouped as oral lichenoid disease (OLD) a series of chronic inflammatory processes with autoimmune base that affect the epithelium of the oral mucosa. This disease presents in 2% of the population with a marked predilection for the female gender, especially perimenopausal women. Clinically, it is characterized by the presence of lineal reticular papules and histologically by liquefaction degeneration of the basal layer of the epithelium associated with an inflammatory infiltrate with a "band-like" disposition on the lamina propria, composed primarily of T lymphocyte cells. Its pathogenicity is associated with deregulation of the cellular immune system, where the activated cytotoxic CD8 a…
Treatment of oral lichen planus with photodynamic therapy mediated methylene blue: a case report.
2006
Oral lichen planus (OLP) is a common chronic disease of uncertain origin. Many patients with OLP are refractory to all available therapies. The photodynamic therapy (PDT) was used as a possible alternative method in the treatment of lichen planus. Two patients with five oral lichen planus lesions were treated using topical PDT mediated by methylene blue (MB-PDT). The patients were followed up on sessions 3, 7, 15 days and 1 to 9 months after PDT. Clinical improvement was achieved in four lesions. Two lesions showed complete remission, and another two lesions had about 50% clinically improvement 3-9 months after a single session of PDT. No response detected in one lesion. MB-PDT blue seems t…
Molecular analysis of lichen-associated bacterial communities.
2006
The bacterial communities associated with 11 different lichen samples (belonging to eight different species) from different habitats were investigated. The culturable aerobic-heterotrophic fraction of the bacterial communities was isolated from nine lichen samples on protein-rich and sugar-rich/N-free media. Thirty-four bacterial isolates were purified and pooled into groups (phylotypes) by analysis of the ribosomal internal transcribed spacer polymorphism. Twenty five phylotypes were identified, each comprising between one and three isolates. One isolate of each phylotype was partially sequenced and the resulting 16S rRNA gene sequences were compared in a phylogenetic analysis. Three gener…
Augājs kā pilsētvides indikators Daugavpilī
2014
Šajā promocijas darbā ir apkopoti 2006.-2013. gadā veikto pētījumu rezultāti, kuros ir analizēta vides pārveidotības pakāpe Daugavpilī. Pētījumā tiek izmantotas trīs dažādu indikatoru grupas – neofītās vaskulārās augu sugas, epifītie ķērpji un priežu miza. Neofītās augu sugas inventarizētas visos 344 pilsētas kvadrātos, lihenoindikācijas dati iegūti no 82 kvadrātiem, metālu saturs priežu mizās noteikts 50 paraugvietās. Iegūtie rezultāti liecina, ka augstākās Daugavpilī pētīto ķīmisko elementu koncentrācijas priežu mizā konstatētas industriālo objektu tuvumā, lihenoindikācijas zemākie rādītāji saistāmi ar pilsētas centrālo daļu, ko raksturo blīvs ceļu tīkls un intensīva satiksme, kā arī priv…
Gaisa kvalitātes novērtējums Balvos ar lihenoindikācijas metodi
2015
Bakalaura darbā „Gaisa kvalitātes novērtējums Balvos ar lihenoindikācijas metodi” tiek apkopots materiāls par gaisa piesārņojuma pakāpi, to veidiem un ietekmējošiem faktoriem Balvu pilsētā, kā arī ķērpju vispārīgu raksturojumu un metodēm, kas tiek pielietotas bioindikācijā. Darbā tika novērtēta Balvu pilsētas gaisa kvalitāte ar 5 ķērpju indikatorsugām, kas tika izmantotās kā bioindikatori. Pilsētas teritorija tika iedalīta 26 kvadrātos. Lielākajā pilsētas teritorijā ir zems gaisa piesārņojums- 45%, tīrs gaiss ir 40% un vidējs gaisa piesārņojums - 15%.