Oral potentially malignant disorders (OPMD) are chronic conditions, which have a higher risk of transformation to oral squamous cell carcinoma. The aim of this systematic review and meta‐analysis was ...to answer the question: “What is the prevalence of oral potentially malignant disorders among adults?” Studies reporting the prevalence of these conditions (leukoplakia, erythroplakia, oral submucous fibrosis OSMF, and actinic cheilitis) were selected, only studies in which a clinical assessment and histopathological confirmation were performed were included. Of the 5513 studies, 22 met the inclusion criteria for qualitative and quantitative analyses. The risk of bias (RoB) of the selected studies was assessed using the Joanna Briggs Institute Critical Appraisal Checklist for Studies Reporting Prevalence Data. Seven studies were classified as high risk, 12 as moderate risk, and 3 as low RoB. The meta‐analysis showed that the prevalence of OPMD was 4.47% (95% CI = 2.43‐7.08). The most prevalent OPMDs were OSMF (4.96%; 95% CI = 2.28‐8.62) and leukoplakia (4.11%; 95% CI = 1.98‐6.97). OPMDs were identified more commonly in males (59.99%; 95% CI = 41.27‐77.30). Asian and South American/Caribbean populations had the highest prevalence rates of 10.54% (95% CI = 4.60‐18.55) and 3.93% (95% CI = 2.43‐5.77), respectively. The overall prevalence of OPMD worldwide was 4.47%, and males were more frequently affected by these disorders. The prevalence of OPMD differs between populations; therefore, further population‐based studies may contribute to the better understanding of these differences.
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CMK, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Objectives
This systematic review (SR) aimed to summarise and critically appraise available evidence about the association between the synergistic consumption of alcohol and tobacco and the ...occurrence of oral squamous cell carcinoma (OSCC).
Materials and methods
Observational studies investigating the association between the synergistic consumption of alcohol and tobacco and OSCC occurrence were included. Studies were selected in a two-phase process and searches were conducted on five main electronic databases, complemented by three grey literature databases.
Results
From 3260 records identified, 33 articles were included for qualitative analysis, of which 15 were included in the meta-analyses. Overall, the synergistic consumption was positively associated with the occurrence of OSCC (odds ratio OR = 5.37; 95% confidence interval 95%CI = 3.54–8.14). Increased odds for OSCC occurrence were observed regarding the synergistic consumption of alcohol and smoked tobacco (OR = 4.74; 95%CI = 3.51–6.40), alcohol and smokeless tobacco (OR = 7.78; 95%CI = 2.86–21.14), and alcohol, smoked tobacco, and smokeless tobacco (OR = 16.17; 95%CI = 7.97–32.79).
Conclusions
According to the results of this SR, the synergistic consumption of alcohol and tobacco (both smoked and smokeless) significantly increased the odds for the occurrence of OSCC.
Clinical relevance
The knowledge provided by this SR may be useful for a better understanding of differences in the effect of synergistic consumption of alcohol and tobacco products in OSCC development. These data might aid healthcare authorities to develop measures for tobacco and alcohol control considering the needs of their population.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OBVAL, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Objectives
This study aimed to investigate the role of blood and lymphatic microvascular density in the progression of oral squamous cell carcinoma (OSCC).
Materials and Methods
The sample was ...composed of 54 cases of OSCC. The immunoexpression to anti‐alpha‐smooth muscle actin (α‐SMA) and to anti‐endoglin (CD105) was used to determine the microvessel density (MVD); anti‐podoplanin (D2‐40) was used to assess the lymphatic vessel density (LVD); vascular endothelial growth factor (VEGF) was evaluated in malignant cells. The histological differentiation, the worst pattern of invasion (WPOI), tumour thickness and tumour budding (TB) intensity were assessed using haematoxylin–eosin and anti‐pan‐cytokeratin (AE1/AE3). Patients' age and sex, TNM classification and follow‐up time were collected from the medical records.
Results
MVD markers presented a similar pattern of expression in blood vessels. However, only α‐SMA + MVD was significantly higher among women and in tumours ≤4 cm. LVD was lower in tumours with lymph node metastasis. Regarding the histological parameters, high TB intensity was associated with histological differentiation, advanced clinical stage, greater tumour thickness and reduced disease‐free survival. No difference was found in VEGF.
Conclusions
The decrease in OSCC LVD could be related to pathological node involvement, whereas high TB intensity could indicate OSCC progression and worse patient outcomes.
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
The purpose of this study was to evaluate the metabolism and epithelial cell proliferation of odontogenic keratocyst (OKC), dentigerous cyst (DC), and unicystic ameloblastoma (UA) by quantifying the ...nucleolar organizing regions (AgNORs) and Ki‐67 protein immunoexpression. Forty‐eight cases (16 OKC, 16 DC, and 16 UA) were evaluated retrospectively. The metabolism and epithelial cell proliferation was measured by the Ki‐67 positive cell percentage index and by the mean AgNOR count in each group. The Ki‐67 and AgNOR counts were significantly higher in OKC comparing to the DC and UA (p < .001). Ki‐67 positive cells were observed higher in suprabasal cell layers of OKC with uniform distribution, a few of them were predominantly observed in basal cell layer in DC and UA. The AgNOR count was significantly higher in the OKC basal cell layers and observed throughout the lining epithelium of DC and UA. Ki‐67 and AgNOR reinforced the aggressive character of OKC, presenting high metabolism and cellular proliferation compared to DC and UA, possibly due to its more aggressive clinical behavior and high recurrence rate.
Research Highlights
We evidence higher metabolism and epithelial cell proliferation in OKC when compared to UA and DC, supporting its aggressive aspect and its high rate of recurrence.
OKC had intense and predominant labeling of Ki‐67 on the suprabasal layer unlike UA and DC.
Graphical presents higher expression of actual proliferation index in OKC and predominant positive nuclei in the suprabasal layer with uniform and intense distribution throughout the epithelial lining
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
6.
Inhibition of cancer stem cells promoted by Pimozide Gonçalves, Jussara Maria; Silva, Carolina Amália Barcellos; Rivero, Elena Riet Correa ...
Clinical and experimental pharmacology & physiology,
February 2019, 2019-02-00, 20190201, Volume:
46, Issue:
2
Journal Article
Peer reviewed
Open access
Summary
Over the past years, studies have described that users of antipsychotics are less likely to develop cancer than the population in general due to cytotoxic properties of this class of drugs on ...cancer cells. For this reason, Pimozide has been widely studied as a potential anticancer treatment, and satisfactory results in melanoma, central nervous system tumours, osteosarcoma, neuroblastoma, myeloproliferative neoplasms, breast, lung, prostate, ovarian, colorectal, pancreatic, and hepatocellular carcinoma have been showed. Moreover, advantages as clinical use approved by the Food and Drug Administration (FDA), high clinical safety, low side effects, and reasonable price have stimulated the treatment with Pimozide instead of other agents. The action mechanism remains unclear, but three vias associated to cancer stem cell (CSC) hypothesis show that Pimozide: (a) blocks CSC features, as epithelial‐to‐mesenchymal transition (EMT), through inhibition of Wnt‐β/catenin signalling; (b) acts as an inhibitor of signal transducer and activator of transcription (STAT‐3 and 5), pathway which is activated and up‐regulated in CSCs; (c) inhibits ubiquitine specific protease (USP1) and WD repeat‐containing protein 48 (WDR48), that are proteins responsible to inhibit the differentiation and to maintain the cell in an undifferentiated state. Based on this perspective, the aim of this manuscript is to review the antineoplastic role of Pimozide during tumorigenesis and its potential to revert the process of undifferentiation and proliferation of CSC through different vias.
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DOBA, FSPLJ, FZAB, GIS, IJS, IZUM, KILJ, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBMB, UILJ, UKNU, UL, UM, UPUK
Background
Podoplanin (PDPN) is a glycoprotein associated with epithelial‐mesenchymal transition, invasion, and metastasis in several types of malignancies, including oral and oropharyngeal squamous ...cell carcinoma (OSCC). The aim of this systematic review (SR) was to summarize and critically appraise the available evidence about the association between PDPN immunoexpression and clinicopathological features and its utility as a prognostic marker in OSCC.
Methods
Five electronic databases and three gray literature databases were searched for immunohistochemical studies, which were selected in a two‐phase process.
Results
From 721 records identified, 22 cohort and seven analytical cross‐sectional studies were included. Few studies reported that PDPN expression was associated with poorer survival rates in OSCC: overall survival = 4/12, disease‐free survival = 4/7, and cancer‐specific survival = 2/4 studies. Positive associations were most frequently reported on lymph node involvement, higher histopathological grade, and advanced clinical stages.
Conclusion
Within limitations of this SR, PDPN may be associated with lymph node involvement, histopathological grade, and clinical stage of OSCC. Current evidence suggests that PDPN could be a useful prognostic marker for OSCC that needs further exploration.
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CMK, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Reactive hyperplastic lesions develop in response to a chronic injury simulating an exuberant tissue repair response. They represent some of the most common oral lesions including inflammatory ...fibrous hyperplasia, oral pyogenic granuloma, giant cell fibroma, peripheral ossifying fibroma, and peripheral giant cell lesions.
The incidence of those lesions was investigated in an oral pathology service, and the clinical characteristics, associated etiological factors, concordance between the clinical and histopathological diagnostic was determined.
A total of 2400 patient records were screened from 2006 to 2016. Clinical features were recorded from biopsy reports and patients’ files.
A total of 534 cases of reactive hyperplastic lesions were retrieved and retrospectively studied, representing 22.25% of all diagnoses. The most frequent lesion was inflammatory fibrous hyperplasia (72.09%), followed by oral pyogenic granuloma (11.79%), giant cell fibroma (7.30%), peripheral ossifying fibroma (5.24%), and peripheral giant cell lesions (3.55%). Females were predominantly affected (74.19%), the gingiva and alveolar ridge were the predominant anatomical site (32.89%), and chronic traumatism was presented as the main etiological factor. The age widely ranges from the 1st decade of life to the 7th. Clinically, the reactive hyperplastic lesions consisted of small lesions (0.5–2cm) and shared a strong likeness in color to the oral mucosa. The concordance between the clinical and histopathological diagnostic was high (82.5%).
Reactive hyperplastic lesions had a high incidence among oral pathologies. The understanding of their clinical features helps to achieve a clearer clinical and etiological diagnosis, and the knowledge of factors related to their development. This may contribute to adequate treatment and positive prognosis.
As lesões hiperplásicas reativas se desenvolvem em resposta a uma lesão crônica que estimula uma resposta acentuada de reparo tecidual. Elas representam uma das lesões orais mais comuns, inclusive a hiperplasia fibrosa inflamatória, granuloma piogênico oral, fibroma de células gigantes, fibroma periférico ossificante e lesão periférica de células gigantes.
A incidência dessas lesões foi investigada em um serviço de patologia bucal e as características clínicas, os fatores etiológicos associados e a concordância entre os diagnósticos clínico e histopatológico foram determinados.
Foram selecionados 2.400 registros de pacientes entre 2006 e 2016. As características clínicas foram registradas a partir de laudos de biópsia e dos prontuários dos pacientes.
Um total de 534 casos de lesões hiperplásicas reativas foram recuperados e retrospectivamente estudados, representando 22,25% de todos os diagnósticos. A lesão mais frequente foi hiperplasia fibrosa inflamatória (72,09%), seguida por granuloma piogênico oral (11,79%), fibroma de células gigantes, (7,30%), fibroma periférico ossificante (5,24%) e lesão periférica de células gigantes (3,55%). O sexo feminino foi predominante (74,19%), a gengiva e a crista alveolar foram o local anatômico predominante (32,89%) e o traumatismo crônico foi demonstrado como o principal fator etiológico. A idade variou desde a 1ª década de vida até a 7ª. Clinicamente, as LHR consistiram em pequenas lesões (0,5 a 2cm) que apresentaram uma forte semelhança de cor com a mucosa oral. A concordância entre o diagnóstico clínico e histopatológico foi alta (82,5%).
As lesões hiperplásicas reativas apresentaram alta incidência entre as patologias bucais. A compreensão das características clínicas ajuda na realização de um diagnóstico clínico e etiológico mais claro, bem como determinar os fatores relacionados ao seu desenvolvimento. Dessa forma contribui para um tratamento adequado e um prognóstico positivo.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Objective
To assess the prevalence of oral mucosal lesions in patients with Pemphigus Vulgaris.
Methods
Observational studies reporting the prevalence of oral lesions in pemphigus vulgaris patients, ...without restriction to language and year of publication, were selected in a two‐phase process. Search strategies were applied to PubMed, Scopus, Livivo, Web of Science, LILACS, Google Scholar, and OpenGrey databases. Articles assessing the prevalence of oral lesions in patients with conditions other than pemphigus vulgaris were excluded. Risk of bias analysis was performed using the Joanna Briggs Institute's Critical Appraisal Checklist for Studies Reporting Prevalence Data. Synthesis of results was calculated by the software R Statistics version 4.0.2 (The R Foundation). Confidence in cumulative evidence was assessed with the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) criteria.
Results
From 1957 studies identified, 40 were included in qualitative synthesis and 38 in meta‐analyses. The pooled prevalence of patients with oral lesions solely or concurrent with other mucocutaneous lesions was 90.3%. The prevalence of patients with exclusive oral mucosal lesions was 50.8%. Risk of bias was considered low, and the certainty of evidence was very low.
Conclusion
Oral lesions were present in approximately nine out of 10 patients with pemphigus vulgaris. The oral mucosa was the most common site of disease onset. Further longitudinal studies are urged to assess the prevalence of oral lesions at different disease stages.
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CMK, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
This study aimed to synthetize and critically appraise available evidence regarding mucoepidermoid carcinoma (MEC) prevalence among intraoral minor salivary gland tumors (MiSGT). Five main electronic ...databases and three grey literature databases were searched. The risk of bias (RoB) was assessed using the Joanna Briggs Institute Critical Appraisal Checklist for Studies Reporting Prevalence Data. Proportion meta‐analyses were performed. From 1321 studies identified, 82 were included in qualitative synthesis and 80 in meta‐analyses. Sixteen were classified as high, 33 as moderate, and 33 as low RoB. A total of 12 774 MiSGT were found, of which overall MEC prevalence was 16.5% (95% Confidence Interval 95% CI = 14.8%‐18.4%). Most MiSGT were found in the palate (n = 7115), although MEC pooled prevalence in this anatomic location was only 13.6% (95% CI = 11.7%‐15.6%). The retromolar area presented the highest pooled prevalence (58.9%; 95% CI = 47.0%‐70.3%), followed by gingiva (28.8%; 95% CI = 22.7%‐35.4%) and tongue (27.2%; 95% CI = 21.2%‐33.6%). Regarding geographic location, Middle East presented the highest pooled prevalence (20.8%; 95% CI = 14.8%‐27.6%), followed by America (20.0%, 95% CI = 17.2%‐23%) and Europe (15.6%; 95% CI = 9.2%‐23.5%). Among MiSGT, the MEC overall prevalence was approximately 16.5%. Although most MiSGT were found in the palate, the retromolar area was proportionally more affected by MEC.
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CMK, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
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