Malignant myoepithelioma (MM) of parapharyngeal space provide both a diagnostic and therapeutic challenge. Malignant myoepitheliomas are rare tumour of salivary glands. Most occur in the parotid gland, few other sites of origin are described. Malignant myoepithelioma of the parapharyngeal space are extremely rare with only a few cases has been reported. We present a case of malignant myoepithelioma in the parapharyngeal space and discuss its diagnostic and therapeutic aspects.
<span>The biomechanical energy harvesting system (BM-EHS) uses human daily activities to create electricity. The BM-EHS is one of the potential alternative technologies for powering wearable and implantable electronic gadgets without batteries. The hybrid BH-EHS is modeled using two different vibration source-based human activities in this manuscript. The piezoelectric (PE) and electromagnetic (EM) based EHS are combined in the hybrid BM-EHS. The PE- EHS is based on human walking and jagging motions and is represented using a mass-spring-damper system and PE stack. The EM- EHS is based on the human knee and hip motions, with shaft conversion and a DC motor. The PE, EM, and hybrid BM-based EHS are modeled using MATLAB/Simulink, and performance results are realized individually. The PE-EHS obtains the average output voltage of 0.5 V and harvests 53.18 mW of power. Similarly, the EM-EHS achieves the average load voltage of 0.567 V and 30.6 mW harvested power. The hybrid BM-EHS obtains the average load voltage of 0.79 V and harvests 86 mW of power. The proposed BM-EHS is compared with the existing EHS with better-harvested power and energy improvement for the given load conditions. Overall, the harvested power can power up the low-power applications.</span>
BACKGROUND Chronic Suppurative Otitis Media (CSOM) is the chronic inflammation of the middle ear cleft mucosa, which is characterised by irreversible changes in it with a history of ear discharge for more than 3 months through a permanent tympanic membrane defect. Chronic suppurative otitis media is of two types tubotympanic (mucosal) and atticoantral (squamous). Tubotympanic type (mucosal) is mainly due to infection from the oropharynx and the nasopharynx, which travels into the middle ear via the eustachian tube, whereas atticoantral type (squamous type) is due to cholesteatomatous lesions. The prevalence of CSOM was 4.1 percent (3.1%-unilateral and 1.0% bilateral disease). Both otitis media and sinusitis are the most common pediatric diagnoses and they share many common characteristics. The aim of the study is to prove focal sepsis of chronic otitis media, tubotympanic type sinusitis and there is an improvement in middle ear mucosal disease status after functional endoscopic sinus surgery.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.