Two patients developed an acneform eruption in skin areas on the trunk. Both patients had received cobalt radiation through the involved skin areas for treatment of internal tumors. The cutaneous changes in both cases responded to conventional therapy for acne.
Trunnell TN, Baer RL, Michaelides P. Acneform Changes in Areas of Cobalt Irradiation. Arch Dermatol. 1972;106(1):73-75. doi:10.1001/archderm.1972.01620100059015