Zoon's balanitis.

@article{Jolly1993ZoonsB,
  title={Zoon's balanitis.},
  author={Bruce Jolly and Sundar Krishnamurty and Subramanian Vaidyanathan},
  journal={Urologia internationalis},
  year={1993},
  volume={50 3},
  pages={
          182-4
        }
}
Superficial lesions of the glans penis can cause diagnostic difficulties. Zoon's balanitis can be distinguished by characteristic histological changes affecting the epidermis and the dermal vasculature. A 44-year-old male presented after having blood-staining of his underclothes for 5 months. Upon examination, the glans showed a red, moist plaque. Circumcision was performed, and the biopsy showed plasma cell balanitis. Following circumcision, the lesion healed completely. 
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