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.
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.
Langerhans' cell histiocytosis (LCH) is a very rare condition with a high survival rate. Histiocyte cells normally help protect the skin, but sometimes the body has too many of them and they move around the body, causing damage.
Laryngeal papillomatosis is a rare medical condition in which benign (non-cancerous) tumours or growths form in the airway and voice box (larynx). They grow rapidly and can obstruct or block the airway, causing breathing difficulties.
A difference in the length of the arms or legs can occur for a number of reasons. Usually the shorter limb is abnormal, but this is not always the case, as sometimes the longer limb is the abnormal one.
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.
A lymphatic malformation is an area in the body containing clear fluid, called lymph. A lymphatic malformation appears as a lump just under the skin, often in the neck or armpit, although they can develop anywhere in the body.