Andermann syndrome is a rare, inherited neurologic disorder that combines two major problems. First, the long peripheral nerves that control movement and carry ...

Aicardi–Goutières syndrome is a rare, inherited, immune-driven brain and skin disorder in which a baby’s cells mistakenly behave as if they are fighting a ...

Aicardi syndrome is a rare, severe, neuro-developmental disorder that almost always affects girls and XXY boys because it is presumed to be lethal in typical ...

Advanced Sleep Phase Disorder (ASPD)—sometimes called advanced sleep-wake phase disorder (ASWPD) or the advanced sleep-phase type (ASPT) of circadian rhythm ...

Adie syndrome—also called Holmes-Adie syndrome or simply a tonic pupil—is a neurological condition in which one (and later sometimes both) pupils become ...

Adams–Oliver syndrome is a rare, inherited birth-defect disorder in which babies are born with patchy areas where scalp skin (and sometimes bone) failed to ...

Chronic Motor Axonal Neuropathy (sometimes labelled chronic inflammatory axonal polyneuropathy or the “motor-predominant axonal variant of CIDP”) is a ...

Acute Motor Axonal Neuropathy—usually called AMAN—is a fast-moving (acute), immune-triggered disease that attacks the long “wiring” (axons) of motor nerves. ...

Chronic Hereditary Multiple Exostoses (HME)—also called hereditary multiple osteochondromas or diaphyseal aclasis—is a lifelong genetic disorder in which ...

Acute hepatomyoencephalopathy (HME) syndrome is a rare but devastating multisystem toxic disorder characterized by simultaneous injury to the liver (hepato-), ...

Activation Syndrome is a treatment-emergent adverse event most commonly observed early in the course of antidepressant therapy. Clinically, it manifests as a ...

Abetalipoproteinemia, also known as Bassen–Kornzweig syndrome, is a rare autosomal recessive disorder in which the body cannot properly assemble or secrete the ...

Abdallat–Davis–Farrage syndrome is a rare, autosomal recessive neurocutaneous disorder first characterized in 1980 by Abdallat, Davis, Farrage, and McDonald in ...

3C syndrome, also known as Ritscher–Schinzel syndrome or cranio-cerebello-cardiac (CCC) dysplasia, is a rare autosomal recessive disorder characterized by a ...

1q21.1 duplication syndrome (also called 1q21.1 microduplication) is a chromosomal copy-number variant in which a small segment of genetic material on the long ...

1q21.1 deletion syndrome (also called 1q21.1 microdeletion) is a genetic disorder caused by the loss of a small segment of DNA on the long arm (q arm) of ...

Intervertebral disc rotational translation refers to the combined motion in which one vertebral segment rotates around its axis while simultaneously ...

Intervertebral disc lateral translation—also known as lateral listhesis—is a form of spinal displacement in which one vertebral body shifts sideways (in the ...

Intervertebral disc posterior translation, more commonly known as retrolisthesis, refers to the backward (posterior) displacement of one vertebral body ...

Intervertebral Disc Anterior Translation refers to the forward (anterior) displacement of the intervertebral disc relative to its adjacent vertebral bodies. In ...