I would love some feedback on a case I saw today. I tried to make the best decision but I am wondering if I got it right or not. I saw an 8 yr old lab who appeared to have a fairly normal mouth but then we saw this radiographic abnormality. I didn't want to extract this tooth and it was a bear. The tooth itself didn't seem to be a problem but there was a lytic lesion on the distal lingual aspect of 409 which I could see after the tooth was gone. What is this and what causes this? It was not a resorptive lesion. Did I do the correct thing in extracting or are there other tx recommendations?