28 results
Erythema Nodosum: In this case, E. Nodosum has occured secondary to 
Streptococcal infection.
Photo credit, Josh Fierer,
Erythema Nodosum ... Streptococcal infection ... Photo credit, Josh ... #Dermatology #SkinRash ... #Photo #UCSDH
Erythema Annulare Centrifugum (EAC),
This is erythema annulare centrifugum (EAC), one of the “figurate erythemas.” These lesions
Erythema Annulare ... EAC), This is erythema ... associations with infections ... EAC #clinical #photo ... #dermatology #skinrash
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Causes of Erythema ... Sarcoidosis or Lofgren's syndrome ... Giardiasis #Erythema ... Mnemonic #Causes #Differential ... #Dermatology #SkinRash
Fever and Rash - Differential Diagnosis Framework
 • Viral: Measles, Infectious Mono (EBV, CMV), Acute HIV,
Fever and Rash - Differential ... Viral: Measles, Infectious ... Zoster, Coxsackie (hand ... Noninfectious: SJS/TEN, Erythema ... , DRESS, Sweet syndrome
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
inciting causes: infections ... on the back of hands ... mycobacterial infection ... Parvovirus B19 infection ... comparison #table #differential
Necrotizing Fasciitis: Note the extensive edema, erythema, bullae formation, and necrosis in this patient's thigh. At
extensive edema, erythema ... at the site of infection ... Images #Clinical #Photo ... #Dermatology #SkinRash
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
parvovirus B19 infection ... parvovirus B19 infection ... Lyme disease Erythema ... Antiphospholipid-antibody syndrome ... #skin #rashes #differential
Mechanic’s Hands in Dermatomyositis

Finally, mechanic’s hands which are common to Anti-synthetase syndrome and another type of
Mechanic’s Hands ... Anti-synthetase syndrome ... typically present with erythema ... #SkinRash #Dermatomyositis ... Dermatology #Clinical #Photo
Acute Pharyngitis: Differential Diagnosis
Infectious:
 • Respiratory viruses (25-45%)
 • Group A Strep (5-15%)
 • Other bacteria:
Acute Pharyngitis: Differential ... Diagnosis Infectious ... Acute Retroviral Syndrome ... exposure to second-hand ... #Pharyngitis #Differential
Lymphocutaneous Sporotrichiosis Infection

Landscaper w/ painless nodular rash of arm present for months wax and wane; diagnosis?
Lymphocutaneous
Sporotrichiosis Infection ... biopsy preferred Differential ... Sporotrichiosis #Infection ... #clinical #photo ... #hand