The essential<unk>  workup in the management of<unk>  gastrointestinal<unk>  includes a complete blood count, renal function test, liver function tests, and coagulation studies. In patients with life-threatening<unk> , although not diagnostic, a blood type and crossmatch should be done.
Lower gastrointestinal bleeding laboratory findings
Upper gastrointestinal bleeding laboratory findings
Gastrointestinal varices laboratory findings
Portal vein thrombosis laboratory findings
Jaundice laboratory findings
Splenic vein thrombosis laboratory findings
Jaundice physical examination
Colon polyps laboratory findings