Clinical Profile Patient: 25-year-old female. Presentation: Slow-growing, painless, firm swelling in the left mastoid region. Radiological Findings: 1. CT: The Architecture A well-defined, lytic lesion significantly expanding the outer table of the left mastoid bone. The sclerotic margins indicate a slow-growing, benign process. 2. MRI: Tissue Identity T1W Axial T2W Axial T1: Hypointense. T2: Heterog eneously hyperintense. Contrast T1: No internal enhancement, but minimal p