Abdo, abdomen; AFP, alphafetoprotein; BE, barium enema; BM, bone marrow; CA, carbohydrate antigen; CEA, carcinoembryonic antigen; CBC, complete blood count; CI, confidence interval; creat, creatinine; CRP, C-reactive protein; CXR, chest radiography; DVT, deep vein thrombosis; ESR, erythrocyte sedimentation rate; f/u, follow up; Hx, history; LDH, lactic dehydrogenase; LFTs, liver function tests; LN, lymph node; mos, months; neg, negative; No., number; NSE, neuron-specific enolase; OR, odds ratio; PE, pulmonary embolus; NPV, negative predictive value; PPV, positive predictive value; PSA, prostate specific antigen; pts, patients; SCC, squamous-cell antigen; SPEP, serum protein electrophoresis; UA, urinanalysis; UGI, upper gastrointestinal; US, ultrasound; vs, versus; VTE, venous thromboembolism; w/u, work up; yrs, years