Schwannoma of the infratemporal fossa - A rare case report

Schwannoma is a benign nerve sheath tumour that originates from schwann cells of the peripheral nerve. In spite of constituting 25-40% of head and neck tumours its in-traoral presentation is rare which accounts for only 1%. The purpose of this case report is to highlight the rarity of this lesion, to emphasize the significance of an accurate diagnosis and to include tumours of nerve sheath origin in the differential diagnosis of facial asymmetry

Analysis of 55 cases of adenomatoid odontogenic tumor in an Indian population and review of literature

This study reviews the demographic, clinical and radiographic features of adenomatoid odontogenic tumor(AOT) diagnosed in an Indian population over 50 years and also evaluate and compare follicular AOT(F-AOT) and extra-follicular AOT(EF-AOT). 55 diagnosed cases of AOT from 1971-2020 were studied retrospectively. The data regarding the age, sex, location, variant of AOT, duration, clinical features, radiographic appearance, treatment and recurrence were collected and analysed. Of the 722 odontogenic tumors diagnosed, 7.6% were AOTs with higher prevalence of extra-follicular (67.3%) than follicular (32.7%) variant. All the tumors were intraosseous with a marked predilection for maxilla over mandible, ratio 2:1. The patients mean age was 19.8 years with slightly higher female predilection (male:female ratio - 1:1.5). The anterior region (76.4%) was more frequently affected and entire quadrant was involved in 21.8% cases. Clinically, asymptomatic, slow-growing swelling was seen in 81.8% cases with duration of 15 days to 10 years. Radiographically, AOT appeared as well-corticated radiolucent lesion. Canine was the most commonly impacted tooth. Recurrence was seen in 3 cases. Interestingly, in this series extra-follicular was twice more common than follicular AOT. Few cases involved the entire quadrant or crossed the midline of either jaws

CP Violation in Two Zero Texture Neutrino Mass Matrices

It has been shown that the neutrino mass matrices with two texture zeros in the charged lepton basis predict non-zero 1-3 mixing and are necessarily CP violating with one possible exception in class C for maximal mixing.Comment: 6 pages, no figures, final version with minor changes, to appear in Phys. Lett.

Phenomenological Implications of a Class of Neutrino Mass Matrices

The generic predictions of two-texture zero neutrino mass matrices of class A in the flavor basis have been reexamined especially in relation to the degeneracy between mass matrices of types A_1 and A_2 and interesting constraints on the neutrino parameters have been obtained. It is shown that the octant of $\theta_{23}$ and the quadrant of the Dirac-type CP-violating phase $\delta$ can be used to lift this degeneracy.Comment: 16 pages, 4 figures, final version with minor changes to appear in Nucl. Phys.

Salivary Duct Cyst

Salivary duct cysts (SDCs) are true cysts caused by obstruction of salivary ducts and are rare in minor salivary glands. Intraoral SDCs and mucoceles represent clinically salivary gland neoplasms, making diagnosis difficult and subject to errors in treatment. It is important for Oral and Maxillofacial Surgeons to include SDC in the differential diagnosis of swelling affecting buccal mucosa

Four Zero Texture Fermion Mass Matrices in SO(10) GUT

We attempt the integration of the phenomenologically successful four zero texture of fermion mass matrices with the renormalizable SO(10) GUT. The resulting scenario is found to be highly predictive. Firstly, we examine the phenomenological implications of a class of the lepton mass matrices with parallel texture structures and obtain interesting constraints on the parameters of the charged lepton and the neutrino mass matrices. We combine these phenomenological constraints with the constraints obtained from SO(10) GUT to reduce the number of the free parameters and to further constrain the allowed ranges of the free parameters. The solar/atmospheric mixing angles obtained in this analysis are in fairly good agreement with the data.Comment: 14 pages, 3 figures, 1 tabl

Phenomenological Analysis of Hybrid Textures of Neutrinos

We present a comprehensive phenomenological analysis of the allowed hybrid textures of neutrinos. Out of a total of sixty hybrid textures with one equality between the elements of neutrino mass matrix and one texture zero only twenty three are found to be viable at 99% C.L. whereas the earlier analysis found fifty four to be viable. We examine the phenomenological implications of the allowed hybrid textures including Majorana type CP-violating phases, 1-3 mixing angle and Dirac type CP-violating phase, $\delta$. We, also, obtain lower bound on effective Majorana mass for all the allowed hybrid textures.Comment: To appear in Phys. Letts. B. Two figures adde

Near Maximal Atmospheric Mixing in Neutrino Mass Matrices with Two Vanishing Minors

In the flavor basis there are seven cases of two vanishing minors in the neutrino mass matrix which can accommodate the present neutrino oscillation data including the recent T2K data. It is found that two of these cases, namely $B_5$ and $B_6$ predict near maximal atmospheric neutrino mixing in the limit of large effective neutrino mass. This feature remains irrespective of the values of solar and reactor mixing angles. A non-zero reactor mixing angle is naturally accommodated in these textures.Comment: 14 pages, 6 figures, 1 table, accepted for publication in Phys. Lett.

Maternal-Fetal Attachment: Does it predict parenting outcomes?

Maternal-fetal attachment (MFA) predicts critical aspects of the caregiver-child relationship, including parental sensitivity and engagement. However, little is known about the relation between MFA and specific parenting beliefs and attitudes that contribute to these positive parenting behaviors, such as parenting sense of competence and parenting stress. The aim of this longitudinal study was to examine if MFA predicts specific domains of parenting sense of competence and parenting stress when children are two years of age. Participants included 53 mainly Caucasian women with a mean age of 33.9 years. MFA was assessed during pregnancy (mean gestational age = 27.02 weeks) using the Maternal Fetal Attachment Questionnaire. Parenting sense of competence and stress were assessed when the children were 2 years of age with the Parenting Sense of Competence questionnaire and the Parenting Stress Index questionnaire. Results of regression analyses indicated that higher levels of MFA significantly predicted higher levels of parenting satisfaction, a domain of parenting sense of competence. They also indicated that higher levels of MFA predicted lower levels of two domains of parenting stress, including stress associated with attachment and role restriction. These findings suggest that prenatal attachment is important to assess during pregnancy, as it may predict future parenting beliefs and attitudes, including sense of competence and stress

Spectrum of lip lesions in a tertiary care hospital: An epidemiological study of 3009 Indian patients

Aim: Large-scale population-based screening studies have identified lip lesions to be the most common oral mucosal lesions; however, few studies have been carried out to estimate the prevalence of lip lesions exclusively. The aim of present study is to highlight the diversity of lip lesions and determine their prevalence in an unbiased Indian population. Materials and Methods: Lip lesions were selected from 3009 patients who visited the department over a period of 3 years (January 2012 to December 2014). Age, sex, location of lip lesions, a detailed family and medical history, along with the history of any associated habit was recorded. Biopsy was carried out in necessary cases to reach a final diagnosis. The pathologies of the lip were classified based on the etiology. Results: Among 3009 patients, 495 (16.5%) had lip lesions ranging from 4 years to 85 years with a mean age of 39.7 years. There were 309 (62.4%) males and 185 (31.9%) females. Lower lip was the most affected region (54.1%) followed by the corner of the mouth (30.9%) and upper lip (11.7%). In 3.2% of the cases, both the lips were involved. Of the 495 lip lesions, the most common were Potentially Malignant Disorders (PMDs) (37.4%), herpes labialis (33.7%), mucocele (6.7%), angular cheilitis (6.1%), and allergic and immunologic lesions (5.7%). Conclusion: Lip lesions may act as an indicator for the presence of an underlying systemic disease. PMDs and infections were the most common lip lesions in the present study