A dangling testis...
It's a dangling testis like a bell-clapper hinging below inguinal canal from inborn poor fixation of testis supposedly to the scrotal wall so it twists as testicular size increases and cremasteric muscle acts; this is intravaginal and happens to the puberty
Those hinging above external inguinal ring are extravaginal, happening to newborn or before birth. Detail? Ask doc in expertise.