External root resorption on #8 — monitor or extract?

45-year-old, asymptomatic, this showed up on routine PA. No trauma history patient can recall. Tooth is vital, no mobility. **What I'm weighing:** - Resorption appears to be in middle third - No symptoms = maybe leave alone? - But if it progresses, extraction + implant gets harder **My instinct:** CBCT to assess 3D extent, then decide. But wanted to hear what you all would do. Would you monitor, refer to endo, or start treatment planning for extraction?