Two cases of Nicolau syndrome associated with glatiramer acetate

We report two cases of Nicolau syndrome (embolia cutis medicamentosa), a rare complication of injectable medications, both associated with the administration of 20 mg of subcutaneous glatiramer acetate. Both patients required surgical debridement and were subsequently treated conservatively without additional complications. Patient 1 opted to discontinue disease-modifying therapy. Patient 2 continued glatiramer acetate therapy without complications by using other injection sites. These cases highlight the need for prompt investigation of new unusual skin lesions in patients receiving injectable multiple sclerosis treatments (regardless of length of treatment and previous minor cosmetic concerns) and illustrate the clinical distinction between Nicolau syndrome and drug-induced skin necrosis.