Erythema multiforme occurred in a 31-year-old woman as a complication of BCG immunotherapy administered by scarification for a Clark's level IV malignant melanoma. This is an unusual complication of the scarification technique.
(Arch Dermatol 115:614-615, 1979)
Tschen EH, Jessen RT, Robertson G, Becker LE. Erythema Multiforme as a Complication of BCG Scarification Technique. Arch Dermatol. 1979;115(5):614-615. doi:10.1001/archderm.1979.04010050048017