Conversation: The conversation between human and AI assistant.
[|Human|] In the last few weeks my wife has developed what appears to be a fluid-filled cyst on her sturnum between her breasts. It is soft and seems to shift in shape and size, which is generally about four inches laterally, two or three vertically. She has had two heart surgeries for aortic aneurysms, one in 1990, replacing the aortic valve, and the second, to resect the aortic arch, in 2011. The cyst is located beneath the scars from those surgeries. What could it be and how should it be treated?
[|AI|]  Usually treating a lump on the sternum by identifying and ad Chat Doctor.  In some cases, lumps and bumps are considered normal. Based on your introduction it can be related to her surgical procedures on chest. Fulfilled cyst may form because of chemical imbalances or hormonal shifts. An chest X-ray should be done to evaluate this lump and other possible changes in ribs and lungs. If the X-ray will find a fluid-filled cyst, simple