Persistent Frenulum.

Persistent Frenulum.
Congenital persistent frenulum, usually detected at the time of a Breeding Soundness Evaluation (BSE). The persistent band limits extension of the penis, and may cause deviation of the penis. These bulls should be culled due to the hereditary nature of the condition. The band can be severed and the bull kept for natural service provided the offspring is not kept for breeding purposes. Proximal ligation prior to cutting is recommended because of the common presence of a well developed artery within the band.

Larsen RE (1982)