A 21-year old male complained pain in his penis which has rapidly grown in its mass. We found a cystic mobile mass of about 2cm in diameter at the frenulum of the penis. A modified circumcision was performed ten years ago that an incised skin of prepuce was rolled and implanted in the operation site. The patient found an asymptomatic small nodule one month after a circumcision. We found no communication with the urethra. We performed an excision of the mass to confirm the diagnosis. Pathologic examination revealed epidermal cyst and abscess formation. We used antibiotics for treatment of infection.