12 year old daughter seen for persistent joint pain (2-3 months) in hips, knees, shoulders, fingers, toes. Fever of 101 with only symptom being worsened joint pain accompanied by muscle aches. Curious about absolute lymphocytes at 0.593 THOU/uL and monocytes at 21%. CBC results follow:
WBC     4.1 THOU/uL     4.0 - 10.5 THOU/uL
RBC     4.35 MIL/uL     4.10 - 5.30 MIL/uL
HGB     12.8 g/dL     12.0 - 15.0 g/dL
HCT     38.3 %     35.0 - 45.0 %
MCV     87.9 fL     78.0 - 95.0 fL
MCH     29.5 pg     26.0 - 32.0 pg
MCHC     33.6 g/dL     32.0 - 36.0 g/dL
RDW     12.7 %     11.5 - 14.0 %
PLATELET COUNT     202 THOU/uL     140 - 450 THOU/uL
MPV     7.9 fL     6.5 - 9.5 fL
PMN'S     58 %     
PMN ABS     2.338 THOU/uL     2.000 - 7.500 THOU/uL
LYMPHOCYTES     14 %     
LYMPHS ABS     0.593 THOU/uL     1.100 - 3.500 THOU/uL
MONOCYTES     21 %     
MONOS ABS     0.851 THOU/uL     0.300 - 1.000 THOU/uL
EOSINOPHIL     7 %     
EOS ABS     0.304 THOU/uL     0.000 - 0.500 THOU/uL
BASOPHILS     0 %     
BASOS ABS     0.016 THOU/uL     0.000 - 0.200 THOU/uL