7 results
What is Fecal Occult Blood Testing (FOBT)
 • Screening for colorectal cancer in average risk population
setting - Guaiac ... Testing #FOBT #Guaiac ... #FalsePositives
Urine Drug Screens - Common drugs that may cause false positive tests 

Amphetamines:
Bupropion, Labetalol, Methylphenidate, Phenylephrine,
#DrugScreens #UDS ... Toxicology #Diagnosis #FalsePositive
Summary of Agents Potentially Contributing to False Positives on Urine Drug Screens (UDS)
Marijuana Metabolites
 • dronabinol,
Drug Screens (UDS ... #FalsePositives ... DrugScreening #UDS
Causes of Inaccurate Fecal Occult Blood Test Results 

False Positive gFOBT:
Ingestion of nonhuman heme (eg, meat
medication #Guaiac ... Testing #Laboratory #FalsePositive
Agents Causing Potential False-Positive Results With Urine Drug Screening 

#Urine #DrugScreens #UDS #Laboratory #Toxicology #Diagnosis #FalsePositive
#DrugScreens #UDS ... Toxicology #Diagnosis #FalsePositive
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
Mucormycosis • Neg (<60 pg ... not available in US ... Fungal #Testing #FalsePositives
Pyoderma Gangrenosum (PG)
50 M Crohn’s dz had a small pustule on the ankle 4 mo ago
Pyoderma Gangrenosum (PG ... progressively worse s/p I&Ds ... Pyoderma gangrenosum (PG ... Management of PG ... #Gangrenosum #PG