The left ankle films show a small, well-defined lucent (lytic) lesion in the distal tibial metaphysis, with a relatively narrow zone of transition and no obvious aggressive periosteal reaction. This appearance is most suggestive of a benign fibrous lesion, such as a non-ossifying fibroma / fibrous cortical defect.

I do not see an obvious displaced ankle fracture or dislocation. Ankle alignment and the tibiotalar joint space appear maintained.

However, this is a photo of a screen rather than the original DICOM images, so it cannot replace a formal radiology report. If there is focal bone pain, night pain, fever, swelling, or worsening symptoms, an orthopedic review is important because other causes of a lytic lesion, including a Brodie abscess (subacute osteomyelitis), need clinical and sometimes MRI correlation. The older comparison image may suggest no dramatic progression, but that should be confirmed on formal side-by-side radiology review.

Non-ossifying fibromas are commonly benign lytic lesions in young people and can occur in the distal tibia, as described in Rockwood and Green's Fractures in Adults, p. 399. When a bone lesion is indeterminate or symptomatic, further characterization with MRI is commonly considered under ACR imaging criteria.

Please share the written X-ray report, age, and whether there is pain or an injury history if you want a more specific interpretation.