Conversation: The conversation between human and AI assistant.
[|Human|] My friend was showing me that he has an indention in his chest under his sternum. you can follow his sternum from the top with your finger and it just dropps off to almost a hole about half way. (Or at least comparing myself to his). Could this be dangerous? He has never been to the doctor about it. He was telling me that if he gets hit in chest area , it is very easy for him to get the breath knocked out of him?
[|AI|]  Respected user, thanks for using Chat Doctor.come have evaluated your query thoroughly.* Mentioned indentation seems more likely due to trauma leading to part of cartilage destruction or insult in form of hollowing, although there are other cases of lytic lesions but it looks less likely.* Strongly recommended to undertake digital high resolution tangential view x-ray of the sternum. Hope this clears your query. Welcome for further assistance. Regards.