RESUMEN
Plasma cell balanitis (Balanitis circumscripta plasmacellularis or Zoon's balanitis) is an idiopathic, benign condition of the glans penis or prepuce. It occurs mostly as a solitary, persistent plaque among middle-aged to older uncircumcised males. It is characterized by chronic, shiny, smooth, red-orange plaques with small, dark red stippling. When the plasma cell balanitis is suspected clinically, diagnosis can be readily confirmed by microscopic examinations of the lesion. Differentiating this lesion from similar lesions such as premalignant, infective and other inflammatory penile lesions is important. The current preferred treatment is circumcision and this disorder can be treated relatively easily by circumcision. We, herein, report an interesting case of plasma cell balanitis on preputial mucosa.