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A colonoscopy is a test that allows the doctor to look at the colon for any abnormalities. This is to confirm or rule out a condition or diagnosis. A colonoscopy is the ‘gold standard’ way of assessing the gut.


An electrogastrogram (EGG) is a painless test which measures the electrical activity in the stomach, before, during and after food.This page explains about the EGG procedure, what it involves and what to expect when your child comes to Great Ormond Street Hospital (GOSH) to have it.

Antroduodenal manometry

This page from Great Ormond Street Hospital (GOSH) explains about antroduodenal manometry. Antroduodenal manometry is a test to measure how well the muscles and nerves in the stomach and small intestine work. These move rhythmically to push food and drink through this part of your child’s digestive system and into the colon (large intestine).

Preparing for treatment

Hospitals can be scary places, especially if your child is coming in for an operation. To help reassure you and let you know what to expect, take a look at our video podcast from teen Ryan, who has come to Great Ormond Street Hospital (GOSH) for an operation on his leg.

Your child is having an hCG test

Hormones are chemical messengers that switch on and off processes within the body. Human Chorionic Gonadatrophin (hCG) is a hormone that mimics the action of luteinising hormone which is normally produced by the pituitary gland. This page from Great Ormond Street Hospital (GOSH) explains about the hCG test and what to expect when your child has the test. 

Transition from paediatric craniofacial services to adult craniofacial services

Transition is a planned process. It aims to:
  • Prepare the young person for adult services
  • Ensure that when that transfer happens it is a smooth and staged process
  • Involve the young person in decisions about their care and move to adult services
This page aims to offer some suggestions for young people and their parents about how you as a family might be helped through this process.