| Cause | Note |
---|
Mass in the groin | Undescended testicle | No testicle in the corresponding scrotum, the lump is mobile and non-tender. The testicle cannot be drawn into the scrotum. |
Retractile testicle (testis saltans) | No testicle in the corresponding scrotum, but the testicle is palpable in the groin, and it can readily be moved to the scrotum |
Lymphadenitis | A mobile and often slightly tender lump caused either by a systemic infection or an infection in the leg |
A mass in the scrotum | Henoch-Schönlein purpura | Bilateral scrotal swelling and redness, other signs and symptoms of the underlying disease |
Acute idiopathic scrotal oedema | As above without the systemic symptoms |
Epididymitis | Unilateral pain and swelling, often with extensive redness. The testicle is non-tender and in situ. |
Torsion of appendix testis or appendix epididymis | Unilateral painful swelling, the testicle is in situ and non-tender, in some cases a few millimetres long necrotic appendix testis can be palpated or viewed with fluoroscopy |
Testicular torsion | Unilateral painful swelling, the testicle is noticeably tender on palpation and often retracted. If the condition has lasted for some time, redness is also noted on the scrotum. |