I'm doing a case study where a 4-yr old girl presents with fatigue and an elevated temperature. The PCP has found that the manifestations are consistent with an upper respiratory infection, but decides to run tests to rule out leukemia.
Her lab results are:
Hemoglobin: 11 g/dl
Slightly Low Hematocrit: 31%
Erythrocyte count: 4.6 million/mm3
LOW Platelet count: 130,000/ mm3
LOW WBC count: 4,000 / mm3
LOW ("segs") Neutrophils: 1,600/ mm3
LOW Lymphocytes: 1,200/ mm3
Monocytes: 290/ mm3
She has an elevated temperature of 100.4, RR of 28, BP 100/60, HR 120bpm
I'm thinking the results are suggesting acute leukemia. However, I'm confused by why her HR is up, RR is up, temp is up, BP is low, and some of the blood counts are low. It makes sense to me that this would happen if there was an overproduction of abnormal WBC crowding out the other cells, which would then cause a decrease of RBC, thus starving them of oxygen and causing increased RR then HR. But why would it when they are decreased and the RBC is normal? I'm suppose to explain the significance, but I keep reading and researching and nothing makes sense to me. Can anyone help me understand this process?