1964 results
Diagnostic Algorithm for Dizziness and Vertigo
Peripheral Vertigo:
 • Attacks: Sudden, severe, can last anywhere from seconds
worsen with head position ... Positive Hallpike ... vestibular neuritis); positive ... Positive head impulse ... Vertigo #Algorithm #differential
Medications that Can Cause False Positives on Drug Tests

Urine drug screens (UDSs) are simple to use,
Medications that Can Cause ... yielding false-positive ... false-positive ... sertraline #False #positive ... #drug #tests #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 RPR that ... tests are rare; case ... #differential #
Causes of Pediatric Wheezing - Differential Diagnosis Algorithm
CXR Abnormal:
 • Pulmonary Sequestration
 • Congenital Adenoid Cystic
Causes of Pediatric ... Wheezing - Differential ... : • Asthma* Positive ... Wheezing #Wheeze #Differential ... Diagnosis #Algorithm #Causes
Warm Antibody Autoimmune Hemolytic Anemia 
1) DIAGNOSE AIHA
 • Anemia: macrocytic > normocytic, ↑ reticulocytes
 •
autoantibodies: positive ... • Blood smear: Differential ... → schizocytes, Positive ... 2) LOOK FOR a cause
Approach to Platypnea-Orthodeoxia Syndrome 
Platypnea: dyspnea when sitting or standing
Orthodeoxia: sPO2 drops > 5% in upright
5% in upright position ... normalization in lying position ... Syndrome #diagnosis #differential ... #causes
Hilar enlargement
The table summarizes the causes of hilar enlargement.
Normal hili are:
- Normal in position - left
summarizes the causes ... are: - Normal in position ... #Enlargement #Differential
Causes of Polycythemia (Erythrocytosis) - Differential Diagnosis Algorithm
Relative - Normal RBC Mass / Decreased Plasma Volume
Causes of Polycythemia ... Erythrocytosis) - Differential ... Idiopathic JAK-2 Positive ... determination, Smoking, positive ... Erythrocytosis #Differential
Rare Causes of Abdominal Pain
 • Hereditary Angioneurotic Edema - Recurrent visceral that may by swelling
knee-to-chest position ... prone (face down) position ... nerve entrapment - Positive ... radicular pain #Rare #Causes ... Abdominal #Pain #differential
Causes of Sudden Unexpected Death in Infancy (SUDI) - Differential Diagnosis Algorithm
Congenital Anomaly / Disorder:
 •
Causes of Sudden ... Infancy (SUDI) - Differential ... Prone Sleeping position ... Infancy #Infant #Differential ... Diagnosis #Algorithm #Causes