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1 Departments of Physiology and
Surgery (Urology), Medical College of
Ohio, Toledo, Ohio
J. Chakraborty, Ph. D., Department of Physiology, Medical College of Ohio, C. S. #10008, Toledo, Ohio 43699.
A systematic investigation of the effects of unilateral
torsion of the spermatic cord on the contralateral testis
of the guinea pig was carried out for variable time periods, ie, seven days, one, three and six months. Both
histological and ultrastructural studies were made on
all testicular autopsy materials collected from five
groups of animals. Those five groups were: group I, 12
animals with unilateral torsion induced and maintained
until the day of sacrifice; group II, 12 animals with
unilateral torsion induced for four hours; group III,
eight sham-operated animals; group IV, eight pentobarbital injected animals; group V. four untreated control
animals. Of 24 group I and group II animals, degenerafive changes were noticed in the contralateral testis in
ten animals. Those changes ranged from spermatid and
spermatocyte degeneration to the complete loss of all
types of germ cells in the contralateral testis. The degree of damage seemed to correlate with the severity of
damage in the torsion-side testis and the length of time
the damaged testis was retained in the body. It was
concluded that a damaged testis retained in the body
may cause degenerative changes in the contralateral
testis.
Key words: spermatogenesis, testis, guinea pig, torsion
Submitted on May 6, 1981
Revised on July 15, 1981
Accepted on July 24, 1981
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