CRP and tuberculosis: Systemic examination showed blood routine analysis, C-reactive protein (CRP) level, erythrocyte sedimentation rate, ferritin levels, comprehensive biochemistry panel, assessment of cellular immunity, evaluation of humoral immune function, screening for tuberculosis, fungi, parasites, chronic viruses, and other pathogens, arteriovenous ultrasound of the limbs, and chest and abdomen computed tomography (CT) scans, returned normal results.