Hereditary Angioneurotic Edema In Childrens

hi. i have a toddler he is almost 3, he just got his endoscopy done because he had unexplained belly pains, often hiccups (since he was born on and off hiccups) and since 2 months or so now almost every day those strange rashes mostly groin area and down the legs. last friday his lower lip swoll up and both his feet too, big swelling on right wrist and body rashes, not itchy, more blotchy and with the endoscopy we found out his one stomach muscle is weak and sore around and his esophagus is inflamed. doc took biopsy from the esophagus tissue. now we have to wait... he also did blood tests like C1 Inhibitor , C3 und C4, CBC, sedm.rate, etc. My son is very allergic that we know since almost a year. last year he had 2 months unexplained diarrhea , then we did allergy testing, he is allergic to rice, egg whites, molds, trees etc a lot of stuff which we avoid as much as we can. but he never had those strange rashes. our GI doc thinks he could have HANE Hereditary Angioneurotic Edema. What is your oppinion? the eosophils in blood tests always evlevated, low lymphocytes etc. and he sometimes complaines that eating cereals (like cheerios chocolate / there is no rice in it) hurts him in his throat or esophagus. and than he just dont eat it. and since he was born he has a noice when he breathes, not every day, but a lot. please answer. thanks so much. god bless u! Mandy