What does acquired absence of kidney mean?

Acquired absence of kidney refers to a condition where one or both kidneys are not present due to a cause acquired after birth. This can occur due to various reasons, such as surgical removal of a kidney (nephrectomy), trauma, or disease processes that lead to kidney failure and ultimately require transplant or removal. It's important to distinguish acquired absence from congenital absence, which refers to the absence of a kidney or kidneys from birth.