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Syndactyly means 'joined digits' and may involve webbing of the skin, or include fusion of the underlying bones. This may be along part or the whole length of the finger. It is the second most common congenital hand problem and occurs in around 1 in 1,000 births.


Tinnitus can be described as ‘the feeling of hearing noises when noise is not present’. It can also be described as ‘ringing in the ears’, although some people hear a buzzing or humming noise rather than ringing.


The tonsils are areas of tissue on both sides of the throat, at the back of the mouth. Children's tonsils help them to build up immunity and fight infection. In many children, the tonsils become repeatedly infected with bacteria and viruses, which make them swell and become painful. This is called tonsillitis.

Tooth abscess

A tooth abscess is a collection of pus caused by a bacterial infection. It can form on the inside of the tooth (a periapical abscess) or the surrounding gum (a periodontal abscess).

Tooth decay

Tooth plaque is a sticky layer of bacteria (germs) which coats the teeth. When the bacteria in plaque react with sugar (from our food and drink), it produces acid. The acid causes decay or ‘cavities’ in the teeth.

Tooth plaque

Plaque is a soft sticky deposit that continually forms on each of the tooth surfaces. It contains many types of bacteria (germs). It affects everybody, regardless of age.This page from Great Ormond Street Hospital (GOSH) explains about tooth