Hello! Thanks for putting your query in HCM. I am a Gastroenterologist (DM).
I can't understand how gastric cancer
was ruled out, whether he has undergone endoscopic examination or any imaging like CT scan
. If not already done get an endoscopic examination because stomach pain and blood in vomitus is alarming feature and require evaluation and treatment accordingly.
I hope I have answered your query and this will help you. Remain in touch and get-well soon.