Final answer:
Scrotal enlargement in a child can have various causes, with the most likely additional finding depending on the underlying condition. In the case of testicular cancer, a lump or swelling in one testis, fluid in the scrotum, or testicular pain or tenderness may be present. However, it is important to consider other possible causes as well.
Step-by-step explanation:
Scrotal enlargement in a child can be caused by several conditions, and the most likely additional finding depends on the underlying cause. One possible cause is testicular cancer, which is more common in males between the ages of 20 and 39 years. In this case, the additional finding may be a lump or swelling in one testis, fluid in the scrotum, or testicular pain or tenderness. However, it is important to note that testicular cancer is rare in children. Other possible causes of scrotal enlargement in children include conditions like testicular torsion, hernia, hydrocele, or varicocele. Additional findings for these conditions may include pain, redness, or swelling in the scrotum.