SCROTAL LESIONS

This lesson will illustrate lesions in the scrotum of male animals. Additional information is in the chapter in your text:   Special Veterinary Pathology by Thomson

 

f02297.jpg (32844 bytes) SCROTUM ORIGINATION

CANINE SCROTUM

NEVUS

This scrotum had a small nevus. What is the origin of the scrotum?

 

The scrotum forms as an outpouching of the perineum and is derived from paired primordia of ectodermal origin. The scrotum is formed (fused) following gonad differentiation. The early differentiated teste secretes testosterone which is converted to dihydrotestosterone.  Dihydrotestosterone induces scrotal formation from the primitive ectoderm. 

 

 

SCROTAL LINING TESTE SCROTUM MESOTHELIOMA TESTE "SPACE"

In this canine scrotum with testicle, a neoplasm from the peritoneal cavity (a mesothelioma) has spread by direct expansion and exfoliation into the scrotal space and is compressing the teste. What structure lines the scrotal space?

Tunica dartos
Tunica vaginalis
Click on the button by the answer of your choice.

 

SCROTAL CONTENTS
Did you spot a lesion in this bull?
HYPOGONADISM

The scrotum contains the testes and therefore reflects the size of the testes. Scrotal circumference is one measure of testicular development and fertility.

 

Another example. Is this scrotum normal? CANINE
Scrotal size is also influenced by scrotal swelling. Trauma to the scrotum may result in inflammation and edematous swelling. Note the turgid swelling in this dog's scrotum. This greyhound developed scrotal edema while racing. Trauma can cause edema and/or inflammation.

 


CANINE ABDOMEN

SCROTAL DERMATITIS

Do you see an abnormality?

This is a focal area of depigmentation of the scrotum. Can you think of a cause?

 

Will scrotal dermatitis affect fertility?
The increased heat from the inflammatory process may increase the scrotal temperature sufficiently to cause degeneration of the germinal epithelium in the seminiferous tubules. Thus the animal would be less fertile.

 

This is a Duroc boar. What are your rule-outs for this boar?

The condition seems to be unilateral and thus the contents of the scrotum are probably responsible for the size disparity. Thus you should consider herniation, neoplasia, and testicular abnormalities.

Palpation would have enabled you to determine the teste was much larger in the swollen side of the scrotum. This was a case of Brucellosis!

 

WATCH OUT FOR BRUCELLOSIS!

THIS COMPLETES THIS LESSON ON SCROTAL LESIONS

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