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Retinal detachment

The retina is the thin, light-sensitive film lining the back of the eye — the surface on which the image is built.

Retinal migraine (ocular migraine)

A retinal migraine is an attack in which the sight of one eye goes dark, clouds over or starts to shimmer: usually for ten to twenty minutes, occasionally for…

Retinoblastoma (eye cancer in children)

Retinoblastoma is a malignant tumour of the retina, the light-sensitive layer at the back of the eye.

Rett syndrome

Rett syndrome is a genetic disorder of nervous system development that occurs almost exclusively in girls.

Reye's syndrome

Reye's syndrome is a very rare condition in which a child who has just been through a viral illness develops swelling of the brain while the liver stops doing…

Rhesus disease (haemolytic disease of the fetus and newborn)

Rhesus disease is the situation in which antibodies from the mother's blood cross the placenta and destroy the baby's red blood cells.

Rheumatic fever

Rheumatic fever, or acute rheumatic fever, is a complication that develops a few weeks after an untreated streptococcal throat infection.

Rheumatoid arthritis

When joints ache and swell, the first thought is usually the same one: age, wear and tear, time to take it easy.

Rickets and osteomalacia

Rickets and osteomalacia are the same disorder at different ages: the bones do not receive enough minerals and become soft.

Ringworm (dermatophyte infection)

Ringworm is a fungal infection of the skin caused by dermatophytes. Despite the name there is no worm involved: the name comes from the ring shape of the…

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