 Good morning. I'm going to present my paper on ultrasonography and CT evaluation of neck masses. Neck masses are any swellings or enlargements of the structures in the area between the inferior border of mandible and clavicle. Despite our vast area of etiology, the common neck masses are congenital lesions and lymphidinopathy and neoplasias, both benign and malignant. The role of ultrasound in the evaluation of neck region is becoming increasingly important due to the availability of high-frequency probes and color doctors. Computed tomography is often the first diagnostic imaging examination performed in patients in whom the presence of head or neck masses are either evident or suspected. The aim of the current study is to evaluate the role of high-resolution ultrasonography and CT imaging in the evaluation of neck muscles. The objectives of the current study is to study the mass lesion under the following headings that is location, size and extent of the mass, relation to surrounding structures, internal characteristics of the mass, and whether the mass is benign or malignant. The study was carried out at the Department of Radio Diagnosis, Muzakpunagar Medical College and Hospital, and 20 patients presenting with neck masses and they were subjected to USG and CT evaluation. Inclusion criteria consisted of patients who had presented with a clinically palpable neck mass and patients across all age groups. Exclusion criteria included post-operative patients, patients with contraindications to IVA administration of converse medium, pregnant females and patients lost to follow-up. The medical approval was obtained for the study from the Ethical Committee of the Institute and written informed consent was taken from the parents or guardians. All patients were subjected to ultrasonography and MD-CT scans, the patient was informed about the radiation exposure in the examination. CT examination was done in Siemens-Omanto, 16-slice machine and USG examination was done on Samsung, UWS, H60 and F3L, oblique 1M machine. The cytopathological or histopathological examination reports of all patients were collected from the pathology department and were used as gold standard to compare with USG diagnosis and malgae detector CT. Data was entered in Microsoft Excel 2010, and statistical analysis was done using IBM SPWSV24 software. This is USG image of 65 years old female who had biopsy proven. Carcinoma of soft palate showing a large ill-defined regulated left carotid space, likely a left nodal mass, the same patient underwent CT and on CT we can see a large indifference of related lesion, displacing the left common carotid artery and engaging it. And it is displacing the left lobe of thyroid with partial loss of fat planes. There is also focal loss of fat planes with the esophagus. Anterolaterally, it is displacing the sternocleidomestride muscle with loss of fat planes. posteriorly, it is abutting the para-watered muscles with loss of fat planes. So we can see on CT the proper extent of the mass in relation to surrounding structures can be observed as compared to the ultrasonographic examination. The results, characteristics of the study population are as follows. Out of 20 patients, 9 had nodal masses and 11 had non-nodal masses, after which thyroid masses are the most prevalent. Then the comparison of the diagnostic efficacy of USG and CT was done in relation to histopathological examination in which USG had a sensitivity of 92% with specificity of 74.5 true predictive value of 81.5 and negative predictive value of 90.4 and diagnostic efficacy of 84.7. CT had a sensitivity of 97.2% with specificity of 82.3 true predictive value of 88.5, negative predictive value 95 and diagnostic efficacy of 90.9%. The final diagnosis was confirmed by histopathology or FNAC and the non-nodal masses accounted for 95% of total neck masses and nodal masses accounted for 45% of the total neck masses. This was in accordance with study done by Ajay K. Karpan et al. where nodal masses comprised 38% of the total cases. In 2019, out of 50 with aerodigestive malumensis being the most common cause of nodal masses neck and in contradiction to study done by Vijay Pratap et al. where information masses were the most common cause of nodal masses. Similar results were obtained by Ajay K. Karpan et al. versus 2% of the cases and John Rudev Sao et al. where 73% of the cases were non-nodal masses. In the present study USG had a sensitivity of 92.8% specificity of 74.5 and diagnostic efficacy of 84.7. Similar results were obtained by Akriti Rastogi et al. in a study of 100 cases in which they concluded that the USG had a sensitivity of 87% specificity of 96.6 and diagnostic efficacy of 90.2%. Sensitivity, specificity, positive predictive value and negative predictive value of our study were high. However, less than the previous study, this may be due to low comparative sample size and variability in duration of duration when USG was done as compared to the previous study. In the present study CT had a sensitivity of 97% and specificity of 82.3 and diagnostic efficacy of 92.9%. Similar results were obtained by Omay et al. Omay et al. in a study of 57 cases where sensitivity was 94.6, specificity 95 and diagnostic efficacy 94.7. Another study by John Rudev Sao et al. of 60 cases, sensitivity was 90.3, specificity was 96.5 and diagnostic efficacy of 95%. The next study by Ravi et al. of 100 cases had a sensitivity of 89.3, specificity of 93.8% and diagnostic efficacy of 90.9%. In conclusion, high-resolution ultrasound graft fee and color Doppler is a useful mentality for diagnostic evaluation of neck masses in any age group. It is simple, non-invasive and inexpensive diagnostic tool can be used as a first-line mentality for evaluation. For evaluating Sao et al. of tissue masses, especially in young and pediatric populations, CTN shows accurate anatomical localization, lesion, collectivization, and benign lesions and marital lesions. It is useful for staging and provides essential information about the tumor extent that directly affects the surgical approach necessary for curvature of the section. These are my references. Thank you.