Some boys are born with posterior urethral valves (PUV). These are extra flaps of tissue that are in the tube that carries urine out of the body. Babies with PUV may not be able to wee normally – both while growing in the womb and after they are born.
PUV may be suspected during pregnancy, on the antenatal ultrasound scan. PUV is diagnosed after birth with some tests. In some cases, they are diagnosed when a boy is older.
PUV need to be removed by surgery. Sometimes, other treatment is needed. Boys who have had PUV may have problems in their kidneys and/or bladder later in childhood, and will need follow-up throughout their lives.