To the Editor In their JAMA Clinical Challenge article, Dr Ardalan and colleagues1 described a patient with arthralgia and fevers accompanied by a papulonodular rash, which was diagnosed as erythema nodosum and an adverse reaction to azathioprine. The authors supported their diagnosis by noting that similar cases have been reported and that the clinical and laboratory findings were consistent with the diagnosis.
Sarantopoulos A, Gkougkourelas I, Boura P. Assessing the Patient With Arthralgia, Fevers, and Rash. JAMA. 2016;316(17):1827. doi:10.1001/jama.2016.14924