DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Close-up of the head (glans) of the penis in an 83 year old male patient, showing balanitis xerosis obliterans (BXO) with split in the foreskin. BXO is a skin condition in which a white ring of indurated (hardened) tissue forms near the tip of the penis that can prevent foreskin retraction. This may be due to viral or bacterial infection or unknown cause. Balanitis is inflammation of the penis glans.
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