 Hi, I'm Dr. Mithi Sai Kainliathuji from AMC Polysherry and my paper presentation on imaging of cranium vertebral junction abnormalities in multi detector CT and MRI. Introduction. Cranium vertebral junction is the transit zone between the cranium and spine, most complex as well as the dynamic region of spine. It encloses the soft tissue structures of the cervical medullary junctions like medullar spinal cord and lower cranial nerves. Cranium vertebral junction may can be contaminated, developmental or due to malformation secondary to any acquired disease process. These anomalies can lead to neural and vascular compromise, obstructive hypercephalus and cerebrospinal fluid dynamics. So my objectives are to establish the role of free treatment evaluation of cranium vertebral junction abnormalities. So outline normal anatomy of cranium vertebral junction to study the most common developmental and acquired CVJ abnormalities and to arrange the frequently detected CVJ pathological imaging findings. So the materials and methods. This is an institution based prospective observational study from G, B, O, 16 slides and flips MRI on 0.5 test lab. And my sample size is 46. Duration is for a period of two years from October 2019 to September 2021. So inclusion criteria has all patients suspected to have cranial vertebral junction disorder were included in the study from all age groups and both genders. Detailed clinical history was taken and exclusion criteria is a post-operative patient and the post-operative patients. So this pie chart showing a 61 percentage of cranium vertebral congenital anomalies and 22% of trauma, 8% for infertials and 9% for inflammatory conditions. So the result is this is a prospective study of 46 cases of cranium vertebral junction abnormalities. 28 cases that is 61% for congenital abnormalities and 10 patients that is 22% of trauma and 8% of infection and 9% of rheumatoid arthritis. And maines were more common than females. And here in MRI findings, odentite fracture is more common compared with the fracture of uterus and the axis. Among the odentite fractures, type 3 fractures more common. So conclusion, most common abnormality was due to congenital followed by trauma, infection and inflammatory conditions. Among congenital anomalies, os odonium was most common. Among trauma, type 2 odonium fracture was most common. CVJ abnormalities constitute an important group of irritable neurological disorders. Thus it is essential that radiologists should be able to make the precise diagnosis of CVJ abnormalities, classify them and rule out important limiters on CT and MRA. As this information ultimately helps to determine the management of such abnormalities, prognosis and frailty of proliferation. So let us see some of the images. MECRAE line is a line between the basin of Pistion. The tip of dense should always be below this line. If it is above this line, suggestive of basilar invasion. The sagittal CT image of the main shows, cervical spine shows. This line is above the MECRAE line. So the suggestive of basilar invasion. Then os odonium. This is the normal anatomy. At the tip of the odontal, this is the body of axis. This is the normal anatomy. This is the os odonium. This is the separation of the portion of the odentite process from the body of axis. It is the most common developmental anomaly. A small oval-cauticated ossicle with smooth circumferential cortical merchant. This is the anterior-atlanto-dental interval on flexion on neutral and extensin position showing the distance between the anterior-atlanto-dental is reduced. On coronal reconstruction showing a proper alignment of lateral-atlanto-dental joints. And this suggestive of reducible atranpo-axial instability. This is MRA stear mid-sagittal image shows, a syringomyelia. And a peg-like tonsil, which is lies below the pyramid diagonal, suggestive of coronal caring. Now, this is a anterior-atlanto-dental junction pupil process. A 40-year-old history of bilateral limb weakness. This is a sagittal T1 and T2 weighted image showing the restriction of odentite process. A patless and anterior-atlanto-C1 with a pre-vertebral abscess and secondary spinal canal stenosis. This is a T2 odentite fracture. And the first.