Erythema marginatum

Clinic

• It is a type of erythema involving pink rings on the torso and inner surfaces of the limbs which come and go for as long as several months.
• It is found primarily on extensor surfaces.
• It presents with the rings that barely raised
• It is non-itchy
• Face is generally spared

Associated disease

• 5% of patients with rheumatic fever, but is considered a major Jones criterion along with carditis, polyarthritis, Sydenham's chorea, and subcutaneous nodules.
• Sepsis
• Glomerulonephritis
• Sydenham's chorea
• Rheumatic fever

Note

• It should not be mistaken with Erythema multiforme
• Its good rubric in Radar is: Eruption, Herpetic, circinate: Nat-m, Tub
• Annular erythema is its synonym

Miasms

• Group A streptococcal infection, otherwise known as Streptococcus pyogenes