A 57-year-old woman presented with a 2-week history of a tender, erythematous left leg. Three years earlier, she had undergone right lung transplantation for idiopathic pulmonary fibrosis and was being maintained on a regimen of prednisone, mycophenolate mofetil, and tacrolimus. She had bumped her left foot, with spread of redness and warmth, and eventually developed individual, painful nodules on both of her upper extremities. She had no associated fever, chills, or weight changes but developed progressive shortness of breath.
Szyfelbein K, Lin JY, Bellucci KSW, Williams JM. Tender Erythema of the Left Lower Extremity—Quiz Case. Arch Dermatol. 2007;143(4):535-540. doi:10.1001/archderm.143.4.535-b