Undescended testicles can usually be diagnosed after a physical examination. This will determine whether the testicles can be felt near the scrotum (palpable) or if they can't be felt at all (impalpable).
This physical examination can sometimes be difficult, so your doctor may need to refer your child to a paediatric surgeon.
No further scans or tests are needed to locate the testicles if they can be felt by the doctor. If they cannot be felt, part of the initial surgical treatment (see below) may involve keyhole surgery (a diagnostic laparoscopy) to see if the testicles are inside the abdomen.