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Erythematous Rashes - THE ALGORITHMIC APPROACH

Characterized by diffuse redness of the skin due to
capillary congestion, erythematous
the Nikolsky sign ... the Nikolsky sign ... includes Kawasaki disease ... or Nikolsky sign ... #Diagnosis #Dermatology
Fever Patterns - Differential Diagnosis Framework

Continuous Fever:
Temp > 38°C with only 1 degree fluctuation in 24
Differential Diagnosis ... • Rickettsial diseases ... falls (like a wave ... Brucellosis Faget's Sign ... #Patterns #Differential
STEMI Equivalents on ECG
 • Conventional STEMI - Elevation of ST segment at (or 40-60 ms
J point • De Winter ... symmetrical T-waves ... V2 • Wellens sign ... pain • Wellens sign ... EKG #diagnosis #differential
Approach to ECGs - Ischemia
MI = Biomarkers + ECG or echo/angiogram findings
Pathologic Q - 1/3 height
Equivalents / Don't Miss Signs ... bigger than QRS - deWinter ... T waves - starts ... triple vessel disease ... Interpretation #differential
Maculopapular - Diagnostic Algorithm
Pathophysiology:
- Catch-all term with a wide range of potential pathophysiologic mechanisms and causative
red-flags to exclude dermatologic ... Ill-appearing, vital sign ... instability - New-onset fever ... #Diagnosis #Dermatology ... Targetoid #Algorithm #Differential
Diseases of the Biliary Tract
Asymptomatic gallstones - Asymptomatic
Symptomatic gallstones - Biliary pain
Cholesterolosis of gallbladder - Usually
Diseases of the ... nausea, vomiting, fever ... , Murphy sign Chronic ... pain, jaundice, fever ... #differential #
Fever in Returning Travelers from Tropical Regions - Frequent Differential Diagnoses
Medical History:
 • Skin exposure to
Fever in Returning ... Regions - Frequent Differential ... without localizing signs ... Returning #Traveler #differential ... diagnosis #tropical #travel
Bilateral B-Lines in case of Pneumonia on Lung POCUS

Young healthy pt with fever/dyspnea. POCUS lung exam
healthy pt with fever ... immunosuppression, travel ... Differential Bilat ... interstitial lung disease ... partially seen shred sign
Dermatological semiology of Cutaneous Vasculitis 

Clinicopathologic correlations
 • Purpura, papules, pustules, necrosis: involvement of small vessels
Connective tissue disease ... Vasculitis #dermpath #dermatology ... #semiology #signs ... pathology #lesions #differential
Systemic Lupus Erythematosus - Diagnosis
Manifestations:
 - Arthritis 69%
 - Malar rash 40%
 - Fever 36%
 -
Malar rash 40% - Fever ... (aPL) 30-45% Differential ... auto-immune, Infectious diseases ... sclerosis, Still's disease ... autoantibodies #signs