 Hello all, this is Dr. Shivam Puddar. I'm a third year resident working at SAP Institute of Medical Sciences in Ahmedabad. I'm going to be presenting a paper on role of MRI in intracranial space occupying lesions today. Intracranial space occupying lesions as the all-encompassing of a diverse group of lesions. It could be anything whether neoplastic or vascular inflammatory or infective. Anything which occupies space within the brain and increases intracranial tension tends to be termed as an SOL. With MRI, imaging of intracranial SOLs can be done with cylinder anatomical detail and tissue characterization. It helps in early diagnosis and localization of the space occupying lesions along with helping in early treatment of the same. In my present study, I've taken either patients who have been clinically suspected of having an SOL or have already been diagnosed with an SOL by previous cross-sectional imaging of MRI. Ames and objectives with early detection, localization, and diagnosis of the SOL using MRI to characterize those intracranial SOLs and to evaluate the extent of lesions in patients with the raise intracranial tension. Materials and methods I've taken 60 cases in this study, which all of the patients, as the MRI of all of the patients were done in a SVP hospital between October 2019 and June 2020 on Skylar 3 Tesla Siemens MRI machine. Inclusion criteria included all of the patients who were suspected of having an intracranial space occupying lesions or who had already been diagnosed as having previous SOL or had raised intracranial tension. The all age groups were taken in respect of sex. Exclusion criteria were of any patient who were contracted to have an MRI, such as metallic implant insertion, cardiac pacemakers, or metallic foreign body in situ, or patients having claustrophobia results. Most predominant age of involvement was the fourth decade, followed by the fifth decade. Male to female ratio in prison study was 1.7 is to 1. Headache was the most frequent complaint followed by seizures. Visual speech and smell disturbances followed them and other symptoms of raised intracranial tensions were 8%. Other symptoms like anorexia, weight loss, ear discharge, and pyrerexia were also seen. Pyrerectal lobe was the most commonly involved lobe followed by multi lobe involvement. Edema was the most common MRI finding followed by mass effect. Hemorrhage was seen in very few patients. Aggressive tumor showed all of the findings in the majority of cases, such as astrocytomas. Edema was most commonly seen with astrocytomas and metastases. Mass effect was most common with astrocytoma. Similarly, calcification was commonly seen in oligodendrochloroma, cranial pharyngeomas, and metastases. Necrosis was most common with astrocytomas and hemorrhage was mostly seen only in metastases. As you can see, the predominant age involved was 31 to 40, followed by 41 to 50. Sex distribution was 1.7 is to 1. And the clinical presentation was headache for vestiges and then for other symptoms. Hemispherical involvement says parietal lobe was the most commonly involved lobe followed by multi lobe involvement followed by the frontal lobe. Right-sided cases were the most involving the right side of hemispherical, which is the right hemisphere, followed by bilateral, and then the left hemisphere. Predominant MRI finding in all of these patients was edema, followed by mass effect, and then the calcification. As you can see, aggressive tumors like astrocytoma would cause all of the effects, such as edema, mass effect, calcification, necrosis. Hemorrhage was found to be seen in only metastases in my study. Calcification was predominantly seen with oligo dendrogliaomas, craniopharyngealomas, metastases, tuberculomas. This is different ratio of all the tumors which was found in my study with astrocytoma involved was 28% followed by metastases in 30% patients. The maximum number of patients, as I already told, was seen in four decades, followed by fifth decade. Certain tumors like hydroglyomas and metastases involved later in life, that is fifth and sixth decade. Tumors like craniopharyngealoma, oligo dendrogliaomas, meningiomas, abscesses occurred early in the age, such as second to fourth decade, whereas chloride versus perpillomas were seen in the first 22 decades. The sex ratio was found to be quite comparable with the study conducted by B.SHA et al. Number of male patients were more in both the studies. However, the meningiomas were the only tumors having a definite female preponderance in both the studies. In my study, edema was the most common MRI finding followed by mass effect, whereas in the study conducted by Ms. B.SHA, the mass effect was more predominant as compared to edema. Calcification was seen in all the cases for oligo dendrogliaomas in my study, as well as in the study conducted by Ms. B.SHA. Hemorrhage was seen in 8% of astrocytomas by B.SHA, and whereas none of the astrocytomas showed hemorrhage in my study. In my study, high-grid gliomas was the most common subtypes followed by low-grid gliomas, which was not the case with the other study. In the study conducted by B.SHA, it was low-grid gliomas followed by high-grid gliomas. Direct signs for the diagnosis of endogenous space occupying lesions include the tumor itself, normal intensity, or enhancement in different degree of enhanced scans. Indirect signs include edema, mass effect in retinal bleed, or calcification, or bone changes. In conclusion, MRI is the most sensitive modality in the diagnosis and characterization of endogenous space occupying lesions with accuracy of 98.5%. Most common symptoms is generally headache and edema is the most common associated MRI finding. The most common hemisphere to be involved is parietal lobe. Met's for the single most common group of endogenous space occupying lesions while among primary tumors, gliomas are the most common and among those gliomas, astrocytomas are the commonest. Here are a few examples. This is the case of astrocytomas. This is a post-contracactual and t-val, t-val, with tumor involving the frontal lobe, as you can see. This is the case of freniopharyngeoma involving the cellar and the supracellar region and it's predominantly cystic. This is a t-val, with an image. This is non-contrast flare image as well as post-contrast even coronal image of a case of meningioma with internal non-enhancing necrotic areas. This is the case of a patient with known case of lung cancer, as you can see. The patient has two metastases in all in both the hemispheres. Patient came with seizures and on MRI, post-contrast, few tuberculomas were seen, as you can see. Thank you.