Ipsilateral Thigh Hyperperfusion During Acute Testicular Torsion: An Incidental Finding Related to Vascular Reflex

A 16-year-old boy was referred with a painful, red, and swollen left scrotum. The pain had begun 4 hours before admission. Tc-99m pertechnetate testicular scintigraphy showed a hypoactive area in the left side of the scrotum, suggesting left testicular torsion. In addition, increased perfusion was observed in the ipsllateral thigh. Hyperperfusion of the left thigh disappeared after the operation, as evidenced by repeat scintigraphic examination. It is suggested that the hyperperfusion was related to testicular torsion, probably by reflex prodromic impulse through the genitofemoral nerve. It should be noted that such vascular reflexes may be observed in the early phase of testicular torsion.