Include anorexia, vomiting (frequency is very variable from once weekly to several times each day. May also present with haematemesis)and emaciation with longstanding disease. Sometimes dehydration is also present. | Include anorexia, vomiting (frequency is very variable from once weekly to several times each day. May also present with haematemesis)and emaciation with longstanding disease. Sometimes dehydration is also present. |