Erythema Nodosum (E Nodosum)

Etiology

  • Pregnancy
  • Infections: bacterial→ strep, mycoplasma; Viral→ hep b, EBV; Fungal→ cocci, blasto, histoplasmosis; mycobacterial→ TB
  • Meds: OCPs, bactrim, other
  • Autoimmune/Idiopathic: sarcoid, IBD, Bechets dz, other/idiopathic
  • Cancer: lymphoma, AML

Symptoms

  • Can last 3-6w
  • Acute, red, nodular, painful erruption
  • Sometimes f, fatigue, arthralgias

Physical Exam Findings

  • Often on legs
  • Erythematous, painful nodules

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