EN. Painful red nodules on the anterior lower legs of an adolescent female.
EN on extensor lower leg of teen.
Evolving purple lesions in 3-year-old child.
Atypical EN of chin and chest of toddler.
CLINICAL FEATURES
The abrupt onset of symmetric, painful red nodules with indistinct borders on the extensor lower legs characterizes erythema nodosum. The child or teen will limp because of the pain. Girls are more likely than boys to have EN.
There are many infectious associations including streptococcus (30%), tuberculosis, sarcoidosis, histoplasmosis, tularemia, EBV, hepatitis B, yersinia and coccidioidomycosis.
