What is a key clinical finding in testicular appendage torsion?

In cases of testicular appendage torsion, a critical clinical finding is the presence of a palpable, tender, indurated mass on the testis. This mass is often a result of the twisted appendage causing localized edema and inflammation. The condition typically presents with sudden onset of scrotal pain, and the tender indurated mass can be palpated during a physical examination, providing important diagnostic insight.

The other options, while they may present in different conditions affecting the scrotum or testis, are not characteristic of appendage torsion. Fever and warmth might suggest infection, such as epididymitis, whereas a bluish hue on the lower testis is more indicative of testicular torsion itself rather than torsion of the appendage. Recognizing these specific clinical manifestations helps in differentiating testicular appendage torsion from other potential diagnoses.