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Table 1 Main clinical and imaging features of ADSL and of the patient

From: A mild form of adenylosuccinate lyase deficiency in absence of typical brain MRI features diagnosed by whole exome sequencing

Main clinical and imaging features of ADSL

Patient features

- Growth retardation

-

Head and Face

 - Brachycephaly

-

 - Microcephaly

-

 - Prominent metopic suture

-

 - Thin upper lip

-

 - Long smooth philtrum

-

 - Low-set ears

-

 - Strabismus

-

 - Nystagmus

-

Neurologic

 Central Nervous System

  - Psychomotor delay,

+

  - Mental retardation

Mild

  - Hypotonia

-

  - Gait ataxia

First two years of life

  - Inability to walk

-

  - Poor eye contact

+

  - Poor language and speech development

+ partially controlled

  - Seizures

-

  - Spasticity

-

  - Opisthotonus

-

  - Myoclonus

-

  - Brisk reflexes

-

  - Cerebral atrophy

-

  - Cerebellar atrophy

-

  - Hypomyelination

-

  - Atrophy of corpus callosum

-

 

-

Behavioral Psychiatric Manifestations

 - Autistic features

+/−

 - Hyperactivity

-

 - Aggressive behavior

-

 - Temper tantrums

-

 - Stereotypic movements

+

 - Self-mutilation

-

 - Happy demeanor

+

 - Inappropriate laughter

-