Tests used to diagnose IBD

Complete blood countsMicrocytic anemia, leukocytosis with band forms, thrombocytosis
Acute-phase reactantsElevated sedimentation rate and serum orosomucoid, and C-reactive protein levels
ChemistriesLow serum iron level, hypoalbuminemia, elevated liver enzyme levels
Special serologic testspANCA, ASCA
Stool examinationsExclude bacterial pathogens, ova and parasites, occult blood, and fecal leukocytes
Endoscopic evaluationEsophagogastroduodenoscopy with biopsy, colonoscopy with biopsy
Radiologic evaluationUpper gastrointestinal tract with small bowel follow-through, enteroclysis (as indicated), barium enema