Search Medical Conditions

Search medical conditions A-Z 

Landau Kleffner syndrome

Landau Kleffner syndrome (LKS) is a rare epilepsy. It occurs in children usually between the ages of three and nine years and is characterised by loss of language skills and silent electrical seizures during sleep. It may be associated with convulsive seizures and additional difficulties with behaviour, social interaction, motor skills and learning. It is not usually life-threatening, but can impact greatly on quality of life unless it responds well to treatment. It occurs in approximately one child in a million. The disease is more common in boys and does not usually run in families.

Landau Kleffner Syndrome: language and communication

Children with Landau Kleffner Syndrome (LKS) experience a significant regression in their understanding and use of spoken language. This loss of skills often occurs at the onset of the disease and can be the first sign for families that something is wrong. This information sheet from Great Ormond Street Hospital (GOSH) describes how Landau Kleffner Syndrome (LKS) can affect a child’s language skills and outlines recommendations for input and support.


Head lice are tiny brown insects that can only live on human hair. They survive by sucking blood from the scalp. Head lice are easily spread by close contact, but do not spread disease.

Liver cancer

Liver cancer is rare in children and teenagers. The condition comes when cancer cells form in the tissues of the liver. Primary liver cancer is when the cancer starts to grow in the liver. Secondary liver cancer is when it has spread from another organ.