10 results
Helicobacter Pylori Testing  Methods - Sensitivity and Specificity

Serology - 85% - 79% - Does not
Helicobacter Pylori Testing ... Urea breath test ... at UCSF due to cost ... #Laboratory #Diagnosis ... #Accuracy
Rheumatology Workup - Laboratories Studies in Rheumatic Diseases

• Septic arthritis - Gram stain and culture of
more time for the laboratory ... Polyarthritis: • Blood ... : • Complete blood ... (to support a diagnosis ... #workup #diagnosis
Causes of Inaccurate Fecal Occult Blood Test Results 

False Positive gFOBT:
Ingestion of nonhuman heme (eg, meat
Test Results ... #OccultBlood #Testing ... #Laboratory #FalsePositive ... FalseNegative #Diagnosis ... #Differential #Accuracy
Acute Liver Injury - Differential Diagnosis Algorithm

Vascular Causes of Acute Liver Injury: 
 • Hepatic vein:
- Differential Diagnosis ... Ascariasis, Choledochal cyst ... extrahepatic source - Tests ... intestines, white blood ... #differential #diagnosis
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
bronchial wall injury ... parenchyma Diagnosis ... abnormal in adults • Blood ... Bronchoscopy Laboratory ... #differential #diagnosis
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
confounding and inability ... who test positive ... probability of getting ... error Validity (“accuracy ... #calculations #diagnosis
Blood Product Transfusions One Pager Summary
Type and screen - determines blood type and detects in recipient
indirect Coombs test ... Crossmatch - involves testing ... Related Acute Lung Injury ... false negatives on testing ... #Transfusions #diagnosis
Blood Transfusion Reactions

Immune Mediated:
 • Febrile Non-Hemolytic Transfusion Reaction (FNHTR): Most common immune reaction to transfusion.
Related Acute Lung Injury ... develop due to inability ... false negatives on testing ... Borrellia (Lyme disease ... #Transfusion #diagnosis
Causes of Lactate Elevation, Lactic Acidosis - Differential Diagnosis

The most common causes of hyperlactatemia are usually:
- Differential Diagnosis ... removal from the blood ... presentations and disease ... - assess other laboratory ... or diagnostic tests
Langerhans Cell Histiocytosis (LCH)

Granulomatous Lesions comprising langerin-positive histiocytes and an inflammatory infiltrate can arise in virtually
Lungs: Cysts (esp ... DIAGNOSIS • Imaging ... • Laboratory Tests ... : Blood tests to ... Histiocytosis #Diagnosis