ICD-9CM# 785.6Lymphadenopathy, unknown etiology FIGURE 3-68.Workup of lymphadenopathy.ALT,Alanineaminotransferase;CBC,complete blood count;CLL,chronic lymphocytic leukemia;CT,computed tomography;ESR,erythrocyte sedimentation rate. (Modified from Noble J [ed]:Primary care medicine, ed 3, St Louis, 2001...