59 results
Vasculitis: In this instance, the vasculitic skin lesions were secondary to Haemophilus endocarditis.
Photo credit, Josh Fierer,
Vasculitis: In this ... instance, the vasculitic ... to Haemophilus endocarditis ... #Dermatology #SkinRash ... #Vasculitis #Endocarditis
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Causes of Erythema ... Mnemonic NO cause ... Giardiasis #Erythema ... Nodosum #Mnemonic #Causes ... #Dermatology #SkinRash
Erythema Nodosum - Causes and Differential Diagnosis 
Appearance:  erythematous painful lumps usually 1-6 cm in
Erythema Nodosum ... - Causes and Differential ... healing process) #Erythema ... #Nodosum #Causes ... #Dermatology #SkinRash
Erythema Annulare Centrifugum (EAC),
This is erythema annulare centrifugum (EAC), one of the “figurate erythemas.” These lesions
Erythema Annulare ... EAC), This is erythema ... the “figurate erythemas ... Most cases are idiopathic ... #dermatology #skinrash
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
potential inciting causes ... Haverhill fever caused ... of necrotizing vasculitis ... with variety of causes ... • Cause is unknown
Reactive Skin Rash - Differential Diagnosis Algorithm
Reactive erythematous with various morphology
 • Urticaria - Firm /
lasts <24hrs • Erythema ... nodules on shins • Erythema ... #Reactive #SkinRash ... Diagnosis #Algorithm #causes
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
disorders, or other causes ... • Secondary Causes ... • Ig A vasculitis ... reactions • Erythema ... • Bacterial endocarditis
Erythema Nodosum: In this case, E. Nodosum has occured secondary to 
Streptococcal infection.
Photo credit, Josh Fierer,
Erythema Nodosum ... : In this case, ... #Dermatology #SkinRash ... #Erythema #ENodosum
Etiology of Splenic Infarction:
 • Hypercoagulability: Factor V Leiden, Antiphospholipid syndrome, Malignancy
 • Embolic disease: Atrial
PFO, Infective endocarditis ... , Marantic endocarditis ... Splenic vasculature: Vasculitis ... differential #diagnosis #causes
Vascular Skin Lesions - Differential Diagnosis Algorithm
 - Petechiae < 0.2 cm diameter
 - Purpura 0.2
• Acquired - Vasculitis ... #Vascular #Vasculitis ... #SkinRash #dermatology ... Diagnosis #Algorithm #causes