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  • Dialysis

    Dialysis involves removing waste products and excess fluid from the blood when the kidneys stop working properly. Blood is diverted to a machine to be cleaned.

  • Diabetic retinopathy

    Find out more about diabetic retinopathy, a complication of diabetes, caused by high blood sugar levels damaging the back of the eye (retina).

  • Diabetic ketoacidosis

    Find out about diabetic ketoacidosis (DKA), including what the symptoms are, when to get medical help and how to prevent it.

  • Diabetic eye screening

    Find out who should have diabetic eye screening, why it's done and what happens, and when you’ll get your results.

  • Diabetes

    Read about the main types of diabetes, a condition that causes a person's blood sugar level to become too high.

  • Diabetes insipidus

    Diabetes insipidus is a rare condition where you produce a large amount of urine and often feel thirsty.

  • Bone density scan (DEXA scan)

    A DEXA scan is a type of X-ray that measures bone mineral density (BMD). It's also known as a DXA, dual X-ray absorptiometry, a bone density scan or a bone densitometry scan.

  • Developmental dysplasia of the hip

    Developmental dysplasia of the hip is a condition where the ball and socket joint of the hips does not properly form in babies and young children.

  • Developmental co-ordination disorder (dyspraxia) in children

    Read about developmental co-ordination disorder (DCD), also known as dyspraxia, a condition that affects physical co-ordination.

  • Dyspraxia in adults

    Find out more about dyspraxia, which is a common disorder that affects movement and co-ordination. Read about the symptoms, causes and treatments for dyspraxia, and find out when to get medical help.