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Petechial/Purpuric Rashes- THE ALGORITHMIC APPROACH 

These rashes can be especially challenging and are
associated with devastating differential
in vasculitic diseases ... /purpura with fever ... disseminated gonococcal disease ... /purpura with fever ... #Purpuric #Rash
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
Rash - Differential ... Diagnosis Algorithm ... Red Flags: • Fever ... cryoglobulins • Skin ... #Petechiae #Rash
Erythematous Rashes - THE ALGORITHMIC APPROACH

Characterized by diffuse redness of the skin due to
capillary congestion, erythematous
or absence of fever ... If fever is present ... includes Kawasaki disease ... , scarlet fever, ... #Febrile #Fever
Adult-Onset Still's Disease
Clinical triad: Fever, Arthralgia/arthritis, Skin rash ± odynophagia
+ Biological inflammation: Increased neutrophils, Hyperferritinemia, decreased
Adult-Onset Still's Disease ... Clinical triad: Fever ... cancers • Systemic diseases ... autoinflammatory diseases ... AdultOnset #Stills #Disease
Vesiculobullous Rashes - THE ALGORITHMIC APPROACH 
Vesiculobullous rashes provoke significant angst
in many physicians (Figure 5, page
and a fever may ... disseminated gonococcal disease ... hand-foot-and-mouth disease ... localized lesions and fever ... #Algorithm #Differential
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
infection • Lyme disease ... migrans • Lyme disease ... • Rheumatic fever ... Sarcoidosis • Crohn's disease ... #rashes #differential
Systolic Murmurs - Differential Diagnosis Algorithm
Benign / Flow / Hyperdynamic:
 • Pregnancy
 • Fever
 • Anemia
Supravalvular
Pregnancy • Fever ... Rheumatic Heart Disease ... • Rheumatic Fever ... • Marfan's Disease ... • Rheumatic Fever
Maculopapular - Diagnostic Algorithm
Pathophysiology:
- Catch-all term with a wide range of potential pathophysiologic mechanisms and causative
erythroderma, petechiae ... instability - New-onset fever ... sulfa-drug - Skin ... #Dermatology #Rash ... #Differential #
Causes of Acute Onset Fever - Differential Diagnosis Algorithm
Viral:
 • Rhinovirus
 • Influenza Virus
 • Parainfluenza
of Acute Onset Fever ... Meningitis • Skin ... • Sickle Cell disease ... • Drug fever ... #Fever #Acute
Bradycardia - Differential Diagnosis Framework

BRADI Mnemonic
 • BRASH/Hyperkalemia
 • Reduced oxygen/Glucose/Temp
 • ACS
 • Drugs
 •
Bradycardia Cardiac Disease ... Infections: • Lyme disease ... • Chagas disease ... Acute rheumatic fever ... • Yellow fever