3439 results
Medications that Can Cause False Positives on Drug Tests

Urine drug screens (UDSs) are simple to use,
Can Cause False Positives ... on Drug Tests ... yielding false-positive ... on drug tests? ... #drug #tests #differential
Diagnostic Algorithm for Dizziness and Vertigo
Peripheral Vertigo:
 • Attacks: Sudden, severe, can last anywhere from seconds
Positive Hallpike ... test (posterior ... or supine roll test ... test Méniére's ... Vertigo #Algorithm #differential
Benign Adrenal Mass - Differential Diagnosis Algorithm
Hyperplasia - Often Bilateral
 • Congenital Adrenal Hyperplasia
 • ACTH
Adrenal Mass - Differential ... Releasing Adenoma (Positive ... Dexamethasone Suppression Test ... :Renin Ratio) Positive ... AdrenalMass #Benign #Differential
RPR - False Positives
Causes of a false positive RPR that are not syphilis. (False-negative treponemal tests
RPR - False Positives ... Causes of a false positive ... False-negative treponemal tests ... #RPR #False #Positives ... #differential #
Strabismus - Ocular Misalignment - Differential Diagnosis Algorithm
Phoria:
 • Latent deviation
 • Symmetrical corneal light reflex,
Misalignment - Differential ... positive cover/ ... uncover test • ... light reflex, • Positive ... #Misalignment #Differential
Causes of Secondary Hypertension - Differential Diagnosis and Screening Testing
Common causes: 
 • Renal parenchymal disease
Hypertension - Differential ... Renal ultrasound, Tests ... sodium loading test ... conditions (supine position ... #Hypertension #Differential
Malignant Adrenal Mass - Differential Diagnosis Algorithm
Suggestive of Malignancy: Inhomogenous Density, Delay in CT Contrast Washout
Adrenal Mass - Differential ... Releasing Carcinoma (Positive ... Dexamethasone Suppression Test ... Renin Ratio) Positive ... AdrenalMass #Malignant #Differential
Causes of Inaccurate Fecal Occult Blood Test Results 

False Positive gFOBT:
Ingestion of nonhuman heme (eg, meat
Fecal Occult Blood Test ... Results False Positive ... medication False Positive ... FalseNegative #Diagnosis #Differential
Pulmonary Renal Syndrome

Definition: Diffuse alveolar hemorrhage + Glomerulonephritis
Presentation (Pulmonary and renal manifestations can occur weeks apart):
symptomatology Differential ... : - ANCA-positive ... , biopsy By Tess ... Renal #Syndrome #differential
1,3-Beta-D-Glucan and Galactomannan Testing Sensitivity Specificity and False Positives
1,3-Beta-D-Glucan
 • Cell wall component of many fungi
Specificity and False Positives ... samples • False positives ... 0.5 considered positive ... the use of this test ... in BAL does not differentiate