Conversation: The conversation between human and AI assistant.
[|Human|] Hi my girlfriend noticed a small hard bony unmovable lump on my sternum this morning it is located about three finger widths below the center of the collar bone. It is slightly painful when presure is applied to it. I am somewhat concerned about it du to the high cancer rate in my family.
[|AI|]  Hello and welcome to Chat Doctor, A hard unmovable lump on the sternum appears to be a bony growth or lump arising from bone. The first line investigations are an X-ray. Thus, consult an orthopedic for a chest X-ray. The lump can be a bony growth- non-neoplastic or neoplastic- benign or malignant. The nature of the growth can be determined by biopsy and histopathological examination. In the lesion is non-neoplastic or benign tumor, simple excision will suffice. In case the lump is malignant, excision with local clearance will be required. Thanks and take care Chat Doctor.