A patient presents with a lateral periodontal lesion AND an apical (periapical) rarefaction on the same tooth. What is the MOST likely diagnosis?

The combination of lateral AND apical rarefaction (radiolucency) in a periapical radiograph is the classic radiographic pattern of Vertical Root Fracture (VRF). The fracture line along the long axis of the root allows bacteria to communicate with the periodontium along the entire length of the fracture. This creates a 'halo' or 'J-shaped' radiolucency. VRF is commonly seen in endodontically treated teeth and often results in tooth extraction.