Dermatology Online Journal
Pink verrucous plaque in a man with systemic mastocytosis
- Author(s): Terrell, Jessica R
- Urban, Jennifer R
- Fung, Maxwell A
- Tartar, Danielle M
- Kiuru, Maija
- et al.
Porokeratosis ptychotropica is a rare and commonly misdiagnosed subtype of porokeratosis involving the body folds. We present a 53-year-old man with systemic mastocytosis who presented with a pruritic, verrucous plaque in the gluteal fold that showed multiple cornoid lamellae on histopathologic evaluation, diagnostic of porokeratosis ptychotropica. Various treatments have been reported, including topical corticosteroids, retinoids, vitamin D analogs, calcineurin inhibitors, imiquimod, phototherapy, cryotherapy, or ablative laser therapy, but recurrences are common.