 Hello everyone. I'm Dr. Vanshi Kiran. My paper presentation topic is evaluation of mediasional and high-level influence by MDCT in benign and malignant technologies and correlation with histopathology. For others, Dr. Kanil Kumar sir and Dr. Pradeep Kumar sir, from Shanthiram Kumbh medical college in general hospital, I'm Nandhyaal. Introduction. CT is an important diagnostic tool for evaluating many clinical conditions. MDCT is a technology that has provided faster data acquisition and allow three-dimensional multi-planar reformations and minimum intensity projections or projection algorithms and volume rendered imaging. This has resulted in highly refined detailed imaging. In case of imaging of thorax, MDCT gives valuable information regarding the size, size, shape, margins, attenuation, classification, necrosis, and characterization of mediasional and high-level influence, the ability to differentiate between benign and malignant lymph nodes. Early detection of enlarged mediasional, enlarged malignant mediasional lymph nodes helps clinicians to decide further diagnostic steps and narrow down the treatment protocol. Mediasional and high-level influence are enlarged in wider range of technologies. The spectrum of conditions include benign granulomatic disorders like the TV, sarcoidosis, and malignant conditions like lymphoma and metastatic clasinoma. Their causes include proliferative disorders, chasmand disease, primary hypochromygloma globulinumiasis, and histoplasmosis. In the advent of MDCT, there has been a decline in the use of other conventional diagnostic procedures like fluoroscopy and arteriography. MDCT demonstrated precise and accurate delineation of all mediasional structures. Therefore, it is a modality of choice for most mediasional regions and associated lymph node enlargement. As MDCT is easily available in most of the secondary and tertiary care centers, it is accessible for the general population. Our study aims to evaluate mediasional and high-level lymph nodes in benign and malignant mediasional fatalities by MDCT and correlate the findings with histopathology. It aims to solve the study to determine the efficacy of MDCT in the characterization of the mediasional and high-level lymph nodes as benign or malignant to correlate MDCT findings of benign and malignant lymph nodes with histopathology. Typical lymph nodes are lymph node characteristics on CT. They are discreet and surrounded by mediasional fat. They are round elliptical or triangular in shape, soft tissue attenuation. The short axis or the least diameter of the lymph nodes are used when measuring the size. Based on lymphatic lymphoma metastasis from intracurricular neuropathic study, short axis measurement of 12 mm is the upper limit of normal for subcaribbean lymph nodes and 10 mm for lower paratrial and tracheobronchial lymph nodes. And 10 mm for the rest of the lymph node groups. That means the lymph node is based on lymph node enlargement, lymph node morphology, lymph node attenuation and lymph node enhancement. Coming to the lymph node enlargement pattern, the nodes having short axis of less than 2 cm reflect a variety of non-infactures and non-granulometous intrameter diseases. Whereas metastasis and lymphoma granulometous diseases, these are usually better than 2 cm in size. Coming to the lymph node morphology, coalescence of enlarged lymph nodes we've seen in neoplasms and granulometous infections. These created enlarged lymph nodes associated with almost all cases of mediasional lymph node environment. If there is a mediasional environment, it is difficult to diagnose unless the attenuation of the mediasional soft tissue is compared with the attenuation of the fat on the same scan. Usually seen in undifferentiated carcinoma, lymphoma, granulometous mediasonitis, or generalized inflection. Coming to the lymph node attenuation, loading stream necrotic lymph nodes commonly seen in metastasis, seminoma, lymphoma, tuberculosis, fungal infections. Enhancing lymph nodes seen in metastasis and carcinoma diseases. That's why lymph nodes commonly seen in tuberculosis, infactures, granulometous, granulometous, sarphidosis, and fungal infections, silicosis, argin lymphomas, material method of size. Our study population is all patients who went to the radiology department, Shantram hospital, for radiograph and CT, with clinical suspicion of lung and mediasional pathologies, method of correction of data. It is an analytical study conducted on 50 patients who came to the department of radiology, Shantram hospital, with clinical suspicion of lung and mediasional pathology for a period of one year from September 2020 to August 2021. Equivalent use of the 128-slice MDCT scanner, Siemens and Sumatom, inclusion criteria, patients with clinical suspicion of lung and mediasional pathologies, patients consenting to both CT and biopsy of mediasional primary lesion are included. Exclusion criteria include patients allergic to carcass, pregnant women, patients in end-stage renal and hepatic failure, elderly, debilitated patients, coming to the results and analysis. This is a table showing the distribution of the subjects. Most of the patients are seen in 45 to 60 years of age group, coming to distribution of subjects according to sex. 39 patients are male and 11 patients are female. Coming to the symptoms of distribution of subjects, most of the patients having cough as symptoms, 80%, followed by Disneya, 76% of patients, coming to the CT finding distribution in subjects. Well-defined margins are seen in 68% of patients, conglomeration up to 74% of patients, classification is up to 86% of patients, necrosis up to 58% of patients, encasement and mass effect up to 66% contrast enhancement, homogenous enhancement seen in 30% of patients, heterogeneous enhancement seen in 14%, association between features of CT, features of CT, benign and malignant lesions. Most of the malignant lesions, 23% are having indefined margins, conglomeration is up to 62% of malignant lesions, and up to 94% of benign lesions, necrosis is up to 89% of benign and 38% of malignant lesions, encasement and mass effect is up to 92% of benign lesions, present in 11% and part 9% of malignant lesions, contrast enhancement is up to 42% of malignant lesions, homogenous enhancement. Coming to extra nodal site involvement, most common site of extra nodal site involvement is lung, seen in 66% of patients, coming to the clinical distribution, diagnostic distribution, 34% of patients having tuberculosis as clinical diagnosis, and followed by lung carcinoma seen in 26% of patients, coming to the radiological diagnosis distribution, most of the patients, 36% are having adenopathy with tarzoma malangu, followed by lymphoma, 14% of patients, coming to the histopathological diagnostic distribution, 16% of the patients having non-small cell tarzoma and 16% having tuberculosis, coming to the radiological classification distribution, malignant lesions according to radiological classification, malignant lesions seen in 54% and benign lesions seen in 46% of patients, coming to the histopathological classification, malignant lesions seen in 62% of patients, benign lesions seen in 38% of patients, and this is the CT image of metastatic lymph nodes, seen in carcinoma esophageal patients, this is axial CT image showing enlarged necrotic lymph nodes seen in lymphoma patient, this is the axial CT thorax image showing necrotic enlarged lymph nodes with peripheral enhancement, seen in spamous cell carcinoma patient, this is the casual CT, axial CT image showing calcified lymph nodes in tuberculosis lymphoma patient, this is the calcified lymph nodes seen in axial CT image, seen in sarcoidosis patient, there is a showing peripheral axial calcification, coming to the discussion, MDCT plays vital role in characterization of homogenistinal and hyaluronic lymphenopathy as benign and magnet etiology, in our study magnet number of cases was of the rule in mere patients in the fourth through sixth decade, in 50 patients, 31 patients had malignant lymphenopathy, 19 patients are having benign etiology, in total in 50 cases were correlated with hystopathology, the sensitivity of the patient is 87 percent, specificity is 100 percent, positive relative to valence 100 percent, negative relative to valence 80 percent, out of 31 subjects with malignant lesions, HPE in HPE, 88 percent were picked up by CT scan, and 13 percent were halts in interview, out of 19 subjects with benign lesions HPE, in HPE, 100 percent were benign in CT, coming to the conclusion, there was a significant association between MDCT features and hystopathology diagnosis of lymphenopathy, with respect to benign and malignant lymphenopathy, which showed the importance of CT in diagnosing the cause of the malignant lymphenopathy, it also showed how MDCT plays an important additional role in differentiating between the benign and malignant lymphenopathy, showing the need to introduce the, it's using routine practice, MDCT is an excellent and safe non-invasive method, giving all the information required for further management and management of the condition, these are the slidesharing references, thank you.