Indian J Pathol Microbiol
June 2024
Background And Objectives: CD56, associated with neuroectodermal differentiation of the embryonal cells, is often considered a marker of neural lineage. Odontogenic keratocysts (OKCs) are of particular interest because of their characteristic histopathologic features, high recurrence rate, and aggressive behavior. CD56 immunoreactivity in these lesions has been reported with very high frequency.
View Article and Find Full Text PDFJ Oral Maxillofac Pathol
April 2024
Odontogenic myxomas (OMs) represent asymptomatic, slowly expanding gnathic lesions with aggressive biological behaviour. Though the spectrum of OMs remains classical with multilocular radiolucency and presentation of stellate-shaped cells embedded in a mucoid stroma, they may mimic many other lesions radiographically or histopathologically. We hereby discuss a case of OM in a 28-year-old woman with special emphasis on pathogenesis and differential diagnosis.
View Article and Find Full Text PDFBackground: Indistinct and analogous histopathological features of various fibro-osseous lesions make establishing a definitive diagnosis a challenge. There is a need for additional molecular and histochemical tools to support and differentiate these lesions in order to establish a concrete diagnosis.
Materials And Methods: A retrospective analysis of biopsied lesions in formalin-fixed paraffin-embedded sections (10 cases each of fibrous dysplasia, ossifying fibroma, and cement-osseous dysplasia) retrieved from the archives was studied for immunoexpression of osteocalcin (quantitative analysis in osteocytes), collagen characterization using Azan, Picrosirus, and Toluidine blue stain for evaluating intensity and localization of collagen fibers, and morphometric analysis of vasculature (for evaluating mean vessel density as square microns).
Introduction: Cancers are complex tissues composed of multiple distinct cell types that participate in heterotypic interactions with one another. Physiologically cell-to-cell contacts formed by dense populations of normal cells operate to suppress further cell proliferation.
Objectives: The objective of the study is to evaluate and compare the immunoexpression of matrix metalloproteinase-9 (MMP-9) and epithelial cell adhesion molecule (EpCAM) in oral epithelial dysplasia (OED) and oral squamous cell carcinoma (OSCC) and to hypothesize their role in the progression in varying grades of these lesions.
Background: p53 tumour suppressor gene limits unchecked cellular growth in response to DNA damage, by causing G1 arrest and the activation of apoptosis. Inhibitors of apoptosis include survivin which acts by inhibition of caspases. Survivin has a significant role as a cell cycle modulator and is only minimally present in mature tissues.
View Article and Find Full Text PDFIndian J Pathol Microbiol
November 2023
Background: The Fine needle aspiration cytology (FNAC) is considered as a valuable and distinguished diagnostic test in the initial assessment of the patients presenting with a mass in the head and neck region or when a recurrence is suspected after previous treatment.
Aims: This study was therefore designed to elucidate the efficacy of FNAC as an alternate diagnostic tool to histopathology in head and neck swellings and evaluation of staining efficacy of PAP and MGG stain over Haematoxylin and eosin (H and E) in routine cytopathological smears.
Settings And Design: The study was conducted in the Department of Oral and Maxillofacial Pathology, where FNAC samples were collected from 150 patients with head and neck swellings.
Aim: We intend to present a cystic hygroma (CH) case in a 2-year-old baby in the anterior cervical triangle, which is a rare site, as the most common site for the occurrence of CH is the supraclavicular fossa of the posterior cervical triangle.
Background: Among developmental abnormalities in the lymphoid system, CH are usually seen in the posterior neck. Lymphatic malformations are generally exhibited either at birth or before the age of 2 years.
Background: Tongue carcinomas account for 25%-40% of intraoral squamous cell carcinomas (OSCCs). Although TNM staging systems is an international standard for cancer reporting, prognosis evaluation, and treatment planning, multiple histopathological risk assessment predictors such as tumor thickness (TT), tumor shape, tumor growth pattern, and invasive malignancy grading scoring systems have been studied and should form a basis for prediction and prognostication of such aggressive carcinomas.
Aim: To evaluate and characterize the histomorphological prognostic indicators in OSCCs of tongue and compare it with OSCCs of other anatomic sites within the oral cavity.
Background: Oral submucous fibrosis (OSMF) is a potentially malignant disorder associated with habit of chewing betel quid containing arecanut. Morphological features of OSMF especially fibrosis suggests a possibility of the hypoxic environment in diseased tissues. The adaptation of cells to hypoxia appears to be mediated via hypoxia inducible factor-1α (HIF-1α) which is also said to be associated with malignant transformation of epithelial cells in various other carcinomas like prostate and cervical carcinoma.
View Article and Find Full Text PDFBackground: Odontogenic tumors show a variety of characteristic features that are dependent on the tumor cell origin and the stage of tumor cell differentiation. Odontogenic cysts arise from the enamel organ or remnants of dental epithelium which influences their pathogenetic model and further clinical behavior of these lesions.
Aim: The study aims at assessment of CD 99 immunoexpression in odontogenic keratocyst (OKC) and ameloblastoma (in tooth bearing [anterior to third molar] and nontooth bearing areas [molar ramus area]) to postulate neural influence in their pathogenesis and the clinical behavior.
Introduction: Grafting in oral implantology involves bone augmentation procedures with various bone graft materials. Success of such procedures is evaluated through the amount of bone volume and bone formed at the grafted site. The primary aim of this prospective study was to histomorphometrically evaluate and compare the new bone formation with Bio Oss or Cerabone in the lateral approach sinus augmentation procedure.
View Article and Find Full Text PDFBackground: Salivary gland tumors bear uncanny characteristics of being different based on their morphological aspects rather than the presence of clear demarcation. This ambiguity in the spectrum from benign to malignant salivary gland neoplasms while categorizing the neoplasm is having inherent pitfalls. The present study was, therefore, designed to characterize benign and malignant salivary gland tumors based on their proliferative indices.
View Article and Find Full Text PDFIntroduction: Clinically and histologically normal appearing perilesional mucosa of epithelial dysplasia may harbor early genetic changes. Hence, the present study is designed to determine the early molecular changes in the form of p16 and EGFR immunoexpressions in perilesional tissues.
Objectives: To analyze immunohistochemical expressions of p16 and EGFR individually and percentage change of immunoexpressions in oral dysplastic lesions and their perilesional tissues.
Introduction: Eosinophils are multifunctional granulocytes, which play a pivotal role in health and disease. Tumor Associated Tissue Eosinophilia (TATE) has long been evaluated in the diagnosis and progression of oral squamous cell carcinomas (OSCCs). However, their association with Tumor Associated Blood Eosinophilia (TABE) in OSCCs is still far fetched.
View Article and Find Full Text PDFIntroduction: Oncogenes and tumor suppressor genes play a major role in cancer formation, growth, and progression. One of the important findings in this area is that murine double minute 2 (MDM2) oncogene is a negative regulator of wild-type p53. In tumors, expressing wild-type p53, inhibition of MDM2 expression will stabilize p53 and allow it to perform its proapoptotic function, while simultaneously preventing MDM2 from exerting its p53-independent oncogenic effects.
View Article and Find Full Text PDFHead and neck connective tissue lesions may have diverse calcifications within the fibrous connective tissue stroma. The perplexity involved in the identification and determination of the nature or degree of calcification through routine hematoxylin and eosin (H&E) stains necessitates the usage of a specific, simple, and cost- and time-effective differential staining techniques. The aim of the present study was to develop criteria to distinguish bone formation from bone resorption using methylene blue-acid fuchsin (MB/AF) stain and the role of collagen fibers in the identification of stromal calcifications using polarizing microscopy with picrosirius red stain.
View Article and Find Full Text PDFDentinogenesis Imperfecta and dentin dysplasia are genetic oral diseases inherited in a simple autosomal dominant mode, with high penetrance and a low mutation rate. Both of them are present with bulbous crowns, marked cervical constrictions, severe attritions, few periapical radiolucencies, and premature tooth loss. The diagnosis is based on family history, and detailed clinical examination, while genetic diagnosis may become useful in the future once sufficient disease-causing mutations have been discovered.
View Article and Find Full Text PDFAim: The aim of the present study was to correlate the immunoexpression of alpha-smooth muscle actin (α-SMA) for myofibroblasts with the serum levels of transforming growth factor-β1 (TGF-β1) in oral submucous fibrosis (OSMF).
Methods: A total of 100 cases of histopathologically confirmed OSMF were assessed for α-SMA expression. Clinical data, such as age, sex, mouth opening, and habit history, were obtained for each case.
Objective: To evaluate and compare the leptin levels in gingival crevicular fluid (GCF) and rate of canine retraction using an elastomeric chain and nickel-titanium (NiTi) closed coil spring.
Design: In vivo, clinical study.
Setting: Orthodontic department at ITS Centre for Dental Studies and Research, Ghaziabad, India.
Background: The term oral potentially malignant disorder (OPMD) was recommended to refer to precancer as it conveys that not all disorders described under this term may transform into cancer. Oral squamous cell carcinoma (OSCC) arises through an accumulation of genetic alterations, deoxy ribonucleic acid (DNA) changes, and epigenetic alterations. Thus, a simple yet a sensitive and specific test for early diagnosis is the need of an hour.
View Article and Find Full Text PDFBackground: Identification and differentiation of stromal hard tissue components is a challenging task. Numerous methods of demonstrating these components have been worked upon in the past. Although some of the methods have been successful, there are many drawbacks of employing them.
View Article and Find Full Text PDFMinerva Stomatol
February 2019
Background: Free radicals (FRs) are active chemical substances having unpaired electron(s) which participate in the causation of precancerous lesions or cancer in tobacco habituates. Alterations in the antioxidant levels are reflected throughout the antioxidant enzyme activities in blood, wherein erythrocytes are considered highly sensitive to those enzymes. Our study was therefore aimed to assess the effects of tobacco consumption on erythrocyte antioxidant enzyme- Superoxide dismutase (E-SOD) and evaluate its defensive action.
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