Conversation: The conversation between human and AI assistant.
[|Human|] my sister s one year old grandson was rushed to the E.R, for a fever of 104, and a bump on his head, they don t know where the bump came from, his blood count is 4000, with bands, his temp is down to 101 now, grandma is worried, they are keeping him at the hospital over night, what could this be?
[|AI|]  Band cells are slightly immature neutrophils which are supposed to fight an infection. Had you mentioned the differential count and platelet count, it would have been easier to comment on the possible cause. Since the total leukocyte count is low, there is more likelihood for a viral infection. In such a case however band cell count is generally not high. The C-reactive protein level in blood would have given a better idea about possible infection. Let me mention that viral fevers are quite common in child Chat Doctor.  Talk to your doctor and he would be able to guide you better. It is hard to comment about the possible cause of bump on head without examining. If the platelet count is normal, there is less likelihood of it being due to bleeding. The history of trauma is also important.