Developmental delay, Mental retardation: 8 Possible Causes
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What causes developmental delay and mental retardation? 8 possible conditions

See a list of possible causes in order from the most common to the least.

1

Mental Retardation

Mental retardation or intellectual disability, (MR/ID), exists in children whose brains do not develop properly or function within the normal range. There are four levels of retardation: mild, moderate, severe, an...

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2

Down Syndrome

Down syndrome (sometimes spelled "Down's syndrome") is a genetic abnormality. It is the most common single cause of birth defects in the United States.

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3

Cerebral Palsy

Cerebral palsy is a group of disorders that affect muscle movement and coordination. Learn about the causes, types, symptoms, and treatment of cerebral palsy.

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4

Hydrocephalus

Hydrocephalus is a condition that occurs when fluid builds up in the skull and causes the brain to swell. The name literally means "water on the brain."

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5

Muscular Dystrophies

Muscular dystrophies are a group of inherited diseases that damage and weaken your muscles over time. This damage and weakness is due to the lack of a protein.

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6

Homocystinuria

Homocystinuria is an inherited disorder that keeps the body from processing the essential amino acid methionine. Amino acids are the building blocks of protein. Methionine occurs naturally in various proteins. It i...

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7

Phenylketonuria

Find information on phenylketonuria causes, symptoms, diagnosis, and treatment.

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8

Tuberous Sclerosis

Tuberous sclerosis (TS) is a rare genetic condition. Sometimes called tuberous sclerosis complex (TSC), the disorder causes noncancerous (benign) tumors to grow in the brain and other vital organs, and on the skin...

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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