 A topic for paper presentation is imaging of introscience lesions of patella done at Shadha Institute of Medical Sciences. Ames and objectives are to correlate radiography, MRA findings of introscience patella lesion with histopathological diagnosis. All cases of tumors and tumor-like lesions of the patella diagnosed in the Department of Radiology at the Shadha Institute of Medical Sciences between May 2020 and September 2021 were included. A sample of 20 cases were reviewed under this study. This is a prospective analytical type of study. Results, there were 11 male and 9 female patients with age range of 20 to 72 years. The presenting symptom was majorly knee pain. The most common patellar introscience lesion in my study were benign tumors of 11 cases. The most common benign patellar introscience lesions in our case series was J-in cell tumor in 7 cases. The second most common benign patellar introscience lesion in our series was controblastoma in 3 cases. One case of anoreximal bone cyst was present. There was no malignant tumor in my case series and there were 9 cases of non-neoplastic conditions which includes 5 cases of dose and effect of patella, 2 gout and 2 tuberculosis and 1 case of rheumatoid arthritis. Discussion, the patella is an uncommon location for tumors. It is involved in 1 to 4 out of 1000 cases of bone tumors present with nonspecific symptoms such as pain, swelling, reduced range of movement, mass or pathological fracture. Pre-operative diagnosis is often difficult because radiographs only allow evaluation of this unit and not the histological diagnosis. Imaging with the use of CT and MRA plays an important part in the diagnostic workup. Majority of the patellar tumors are benign. The vast majority are J-in cell tumors and controblastoma. But some uncommon tumors and tumor-like conditions can cause diagnostic dilemmas. J-in cell tumor, it is the most common type of diagnostic patellar tumor which includes one-third of the total patellar tumors. Plain radiographs demonstrates an osteolytic lesion with faded boundaries. CT findings include an introshiaslytic lesion with cortical thinning or cortical erosion and joint diffusion. Pathological fracture may be present in 2 cases. On MRA, the lesion shows higher signal intensity compared to skeletal muscle on T1 weighted sequence and heterogeneous signal intense on T2 weighted sequence. First enhanced fat suppress T1 weighted sequence demonstrates heterogeneous strong enhancement of the lesion. Total patellarctomy is usually the preferred treatment for aggressive GCT of patella. Here we can see lateral knee radiograph showing osteolytic lesion whereas similar findings are seen in the knee skyline view. On sagittal T1 weighted sequence, sagittal proton density fat set and sagittal axial proton density fat set sequences, we can see heterogeneous mass in the upper pole of the patella involving the anterior and posterior cortex with cortical thinning and sclerotic margins. Similar findings in cases of histopathology, we see tumor-like gene cell which is characteristic of gene cell tumor. Controblastoma is the second most common benign patellar tumor. Plain radiographs demonstrate a radio-lucent lesion with well-defined sclerotic margin. Pathological fracture may be present. On MRA shows the lesion has low to intermediate signal intensity on T1 weighted sequence and intermediate to high signal intensity on T2 weighted sequence. Appearance of a lobulated lesion within an expanded patella with a low signal intensity rim. Fluid fluid levels may occasionally be seen. Low signal intensity foci within the tumor corresponding to calcification seen on pain radiographs or CT can be seen. Bone marrow edema is present in majority of cases for which still sequence is of particular value. Here we can see lateral radiograph of the knee and the knee skyline view showing leitic lesion involving the patella with lobulated margins and thin-out cortex. Here it is the sagittal proton density and axial proton density knee images showing heterogeneous expanded mass in the patella with endoscial scalloping and then hypo intense rim. Tumor-like conditions which includes gout, pain radiograph shows lobulated well-defined expand cell osteolytic lesion with sclerotic rim. MRA shows bone marrow edema and well-defined expansive soft tissue lesion with low signal intensity on T1 weighted and high signal intensity on T2 weighted sequences. Thickening and heterogeneous signal intensity in the patella tendon has been described. Here we can see lateral knee radiograph shows osteolytic lesion with sclerotic rim and soft tissue calcification. Here it is an axial proton density fat fat, axial proton density and sagittal proton density knee images showing destruction of the anterior cortex of the patella with heterogeneous signal intensity. Tuberculosis, the knee is the third most frequent location for tuberculosis. Neat tuberculosis mainly involves a synovian with local extension eroding the bone. Knee tuberculosis is rare. Usually patella tuberculosis are very rare in compared to knee. Brain radiographs may show leitic adiabitosclerotic borders. Ticquestrum may be present as a density. MRA detects entroseous lucency with central calcitic density. So resting chronic osteomyelitis with ticquestrum, early bone marrow edema and soft tissue abnormalities. Diagnosis is usually confirmed by histology and bacteria also. Here we can see lateral knee radiograph showing some osteolytic lesion, rim enhancement of the bone abscess with general enhancement of the edematous patella in cases of sagittal T2 fat fat A imaging we can see. When we aspirated the fluid from the legion and subjected to acid first bacillus staining, we can see multiple acid first bacillus. Rheumatoid arthritis, brain radiographs, includes soft tissue swelling, osteopenia, loss of joint space, erosion, growth disturbances and joints of blood sensation. MRA shows synovial hypertrophic joint extrusion as well as osteosan cartilaginous lesion. Active synovitis is characterized by enhancement on T1-weighted galvanium contrast theory. Brosal defect of patella, it is a characteristic leitic patella lesion, which is a normal variant in case of ossification. It is usually an incidental radiographic finding, but occasionally may be symptomatic with knee pain. On plain radiograph, dosal defect is round radiolusional lesion surrounded by a zone of sclerosis located on the superior lateral aspect of dosal surface of the patella. MRA shows a hemispherical defect in the deep cortical surface of the patella with intact overlying cartilage that tends to fill the defect. It demonstrates low signal intensity on T1 and high signal intensity on T2-weighted images. The location, the radiographic appearance and the clinical course are unique, distinguishing it from other lesions of patella. It should not undergo biopsy, as it is a benile condition. Here we can see AP radiograph of the knee showing well-defined lucency in the superior lateral aspect of the patella, suggesting a dosal defect of patella. Here it is a sagittal proton density and sagittal proton density fat-sat images showing high signal intensity on fat separation sequence in the upper posterior aspect of patella with well-defined sclerotic margin and with the cartilage intact and filling in the lesion. Conclusion, MRI imaging features in conjunction with other radiographic features on plain radiographs or CT may help narrow the differential diagnosis for tumor and tumor-like lesions of patella. Imaging may obviate the need for tissue diagnosis in some cases. If there is suspicion of malignancy, histological diagnosis is always the gold standard and should be obtained before definitive treatment. These are my references. Thank you.