Eruptive Epidermal Inclusion Cysts in a Renal Transplant Patient on Tacrolimus

Epidermal inclusion cysts are common cutaneous lesions that can develop anywhere on the body. While benign, these cysts can become inflamed and symptomatic. Symptomatic epidermal inclusion cysts can be treated with intralesional steroid injections or antibiotics, but surgical excision is often necessary for definitive treatment. We present a unique case of tacrolimus-induced eruptive epidermal inclusion cysts on the head and trunk of an adult male post-renal transplantation. Physicians should be familiar with this potential adverse effect, especially due to the difficulty of obtaining definitive treatment for a multitude of epidermal inclusion cysts.