<s>[INST] my son is 7..49lbs..medical history is too long to list.. he has had everything from seizures, to allergies to sucrose, to high fevers, and swollen lymphnodes covering his body... none of the peditricians have any idea.. and seem to have give up, any clues? [/INST] Your son is an infant weighing 3.5 kg only ---you have not given age -------well for an infant to have lymph nodes all over with high temperature, and allergies, he is immunodeficient --that means his protective system in the body is unable to protect him and causes swelling of the lymph nodes. He needs very special tests, may be seen an immunologist, biopsy of lymph nodes. Before that see a pediatric hematologist, rule out cyclic neutropenia by blood counts and also a malignant underlying state such as acutelymphoblastic leukemia </s>