 Good morning everybody. I will be presenting my oral paper presentation on the topic of multi-detector computer tomography in the evaluation of neck masses and their histopathological association. Neck is a conical space extending from the base of skull to the thoraxic inlet. The patient with pathology of neck masses usually present with the history of neck swelling, pain, firstness of voice, dysphagia, dyspnea, fever, etc. They can also have significant weight loss or loss of appetite, which favours malignant etiology or tubercular etiology. Neck masses can be classified as congenital and acquired. Congenital masses are present since birth like thyraclosal cyst, brachial cyst, cystic hygroma. Acquired masses are further classified as nodal and extra-nodal in origin. Nodal masses can be inflammatory, reactive, infectious and neoplastic. Common causes of neural masses are tubercular lymphedinopathy, lymphoma, metastatic lymphedinopathy. Comparative tomography is a very important diagnostic imaging modality for those patients in whom head and neck masses suspect or evident. Improvement in image contrast comes by using two of the images, which shows a section of patients without the effect of over-life structures. Not only the early detection and characterization of masses, MDCT is also useful in follow-up of the patient. So the aim and objective of our study is to study the role of multi-tector-computed tomography in the evaluation of neck masses and to study the spectrum of neck masses and correlating them with histopathological findings. This is a cross-sectional observation study. Then in a hospital from 1st July 2020 to 31st August 2021 at the Department of Radio Diagnosis at a very large institute of Medical Science and Doctoral Medical Hospital. 50 patients were taken who were presented with neck masses to our department. Pregnancy is patient having allergy to contrast media and patient with deranged KFT were not taken for this study. We were able to trace the histopathological report of 45 patients and we correlated it with our findings. Most of the patients in our study were less than 20 years of age followed by the age group 41 to 50 years. Male were 62% and females were 38%. These are the clinical findings of the patient with which the patients were presenting for us for the CT. Neck swelling and pain was the most common clinical complaint followed by fever. We further divided the masses as nodal and extra nodal. In nodal we were having 38%. In extra nodal we were having 31%. Out of 50 cases 19 were nodal masses and 31 were extra nodal masses. In nodal masses 9 cases were of tubercular etiology. 3 were of lymphoma. 7 cases were of metastatic lymph adenopathy from various head and neck cancers. In extra nodal masses we further have a category of congenital and acquired neck masses. In congenital neck masses we found each cases of cystic hygroma, cyroblossal cyst and congenital vascular malformation. In inflammatory non-neoplastic neck masses we observed two cases of abscesses and one case of Ludwig's angina, one of salatinitis. In non-inflammatory neoplastic neck masses we have studied two cases of runnular, one case of colloid nodule and one case of vascular malformation. In benign neck masses we found one case of lipoma, four cases of saliva tumor that is leomorphic adenoma, one case of fascular tumor and one case of nausea tumor which is schwannoma in our case. In malignant neck masses we have studied six cases of laryngeal cartenoma, three cases of thyroid cartenoma, two cases of tonsular cartenoma and one case of salivary gland cartenoma. There was a perfect agreement between the two methods and this agreement was statistically significant. The sensitivity was 100% with specificity of 90% and positive predictive value of 93% and negative predictive value of 100% with diagnostic accuracy of 96%. Two cases classified as benign by histopathological impression were classified as malignant by radiological impression. Neck masses can be nodal or extra nodal in origin, they can be congenital or acquired and can further be divided as inflammatory, non-inflammatory, benign or malignant. Multi-detector computed tomography along with contrast study is a good imaging modality in characterization of neck masses. With the help of multi-planar reformat detection of and telling the extension of neck masses on MDCT has become easier. MDCT is good for eliminating OSHA's anatomy in comparison to any other modality, moreover it is cheap and really available. Now I will be discussing these cases which I have found in my study. The first row will be of non-contrast images followed by contrast in axial, sagittal and coronal reformats. In my first case, 66-year-old male presented with neck swelling and hoarseness of voice on CECT multi-planar reformats. We found that there is an ill-defined heterogeneously enhancing soft tissue lesion involving glottis and supraglottic lesion with mild extension to subglottic lesion was seen. It was associated with cervical lymphadenopathy and diagnosis was squamous cell carcinoma on histopathology and in CECT we gave the diagnosis of transglottic carcinoma larynx. Next case, 55-year-old female presented with pale food swelling in the left parotid space. On ultrasound, a well-defined mass lesion noted in the left parotid gland with increased vascularity. On CECT we can see that there is a multi-lobulated heterogeneously enhancing mass in the superficial lobe of left parotid gland with few non-enhancing areas depicting necrosis. The diagnosis of a sinus cell carcinoma was made on CECT and it was same on histopathology. Nineteen-year-old female presented with the neck mass which moves with deglutation and protrusion of tongue. Assistic lesion is noted entrapped in the strapped muscle which was non-enhancing so the diagnosis of thyroblossal cyst was made. In the next case, 28-year-old male presented with pulsatile neck swelling. On ultrasound, a heteroechoic mass was noted up adding the common carotid artery with minimal internal vascularity. On CECT, a heterogeneously enhancing mass was noted in infrared left parotid space which was causing playing of internal common carotid artery and internal regular vein. And it is causing pressure effect on left lobe of thyroid gland. The diagnosis was made sonoma which was confirmed on histopathology. Eighteen-year-old male presented with bilateral neck swelling with low-grade fever. On ultrasound necrotic cervical lymph adenopathy was seen on CECT multiple periferally enhancing. Lymph nodes were seen at level 1b, 2, 3 cervical levels. So the diagnosis was given to tubercular lymph adenopathy and on histopathology same diagnosis was confirmed. Sixty-six-year-old female presented with right-side neck swelling. Ultrasound was showing so-flow of vascular malformation. On CECT, a mild periferally enhancing lesion with specks of calcification was noted in the right side of the neck. As seen in this image, so the diagnosis of lymph vascular malformation was made. Next case, a 34-year-old female presented with right-side mandibular gland swelling. On ultrasound cystic mass noted in the concerned area, on CECT, cystic lesion in right-side mandibular gland extending to the floor of mouth was seen. So radiological diagnosis of lunging ranula was made. Coming to my last case, a 17-year-old female presented with right-side neck swelling. On ultrasound multi-local cystic lesion was noted in the right side of cervical lesion extending posteriorly. On CECT, a well-defined cystic mass with mild enhancing septa was noted in subcutaneous layer of right side of cervical lesion with extension into the posterior aspect of the neck. Radiological diagnosis of cystic hygroma was made. Now coming to the conclusion, multi-director-computed tomography is a good modality in characterization of neck masses and further health in the management of the patient. But the gold standard always will be the histopathological diagnosis. These are my references. Thank you.