Does ball removal in young males somehow make the arms grow longer?

I was told eunuchs have longer arms than they would if they stayed intact. Is this true? Is the mechanism known?

It doesn't make sense to me because long humerus bones and overall arms are a masculine trait. Biological males of the same height normally have longer arms. Then why does emasculating them result in increased length?

Does ball removal in young males somehow make the arms grow longer?
Does ball removal in young males somehow make the arms grow longer?
Does ball removal in young males somehow make the arms grow longer?
Does ball removal in young males somehow make the arms grow longer?
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