No, he probably couldn't.
Next scenario!
On the edge of a small rural town, lives a small Jewish family, with a small farm running off septic, there are no unhealthy member in the family, nor any farm animals show signs of being unwell. Yet still, the youngest child of this family seems to be experiencing stomach problems. The family history for medical conditions is relatively clean, with the exception of mild lactose intolerance and acid reflux.
The boy vomits often, the color from his skin paling, and he finds it hard to even wake in the morning. He has grown increasingly weaker, with each passing day, and never has any desire to eat, unless forced upon him by his family. At night he if often found crying and struggling to fall asleep, claiming his stomach hurts. He loses a lot of weight on a daily basis, most likely due to his lack of appetite, and he has been experiencing diarrhea and fever. The family really started to worry when a lump beneath the skin emerged.
How do you diagnose him?