Conversation: The conversation between human and AI assistant.
[|Human|] im male, 28 yo. i have a hard immovable lump (no more than 2cm in diameter) located in the inner side of my upper arm. I just noticed this 3 days back. but it could be there for at least 4 months since my massage therapist noticed this first at that time. im having this surgically removed this saturday. what could this usually be? i hope to read ur reply soon. thank you.
[|AI|]  Hi, Welcome to Chat Doctor. There are quite a few possibilities for that lump. It could either be a lymph node, a sebaceous cyst, a Desmond cyst, a soft tissue tumor, or a Charon Chat Doctor.  Without a clinical examination it is not possible to come to a diagnosis. But at your age a malignancy is a rare possibility. So don't worry much. Get it removed and have it sent for histopathological evaluation to know its exact diagnosis. Hope I have been helpful. Regards