Veterinary Andrology and Reproductive Techniques

DEVIATION OF THE PENIS OR PHALLOCAMPSIS

Spiral or corkscrew type of deviation of the penis The condition may be inherited Affected bulls successfully bred the cow for one or more years. When complete erection occurs the corpus cavernosum in the free end of the penis rolls inside the fibrous tunic and the penis slips and pushes laterally under the dorsal apical ligament and the glans penis spirals counterclockwise ventrally and to the tight around the line of penile raphae. May be favoured by early maturation of the supporting structure of the penis and late maturation and growth of the penis under the continued influence of testosterone. “Cork screwing” of the penis occurs at the peak of erection when the layers covering the free end the penis is stretched. If the erection is partial it does not occur. In affected bulls premature full erection occurs prior to intromission resulting in corkscrewing that prevents completion of coitus. Other less common types of the penis are the ventral or rainbow and the mild ‘S’ shaped curvatures and Double penis or diphallus.

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Persistent frenulum is a band of tissue that extends from near the ventral tip of the glans penis to the prepuce. Epithelial separation and rupture of frenulum occur normally a puberty. When a persistence of the frenulum occurs there is usually a blood vessel present in the center of the tissue band comprising the frenulum. There is evidence that this defect is hereditary

Treatment

• The corkscrew or ventral or mild ‘S’ shaped defects of the penis are corrected by surgical attempts.
• Cutting of the connective tissue band with or without ligation is a simple procedure and is uniformly successful for the correction of persistent frenulum

  Since deviations of the penis are mostly hereditary especially cork screwing, it is best to cull the affected animals.

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