chronic maxillary sinusitis

A maxillary sinusitis which lasts for 12 weeks or more.

chronic sphenoidal sinusitis

A sphenoid sinusitis which lasts for 12 weeks or more.

chronic ethmoiditis

A ethmoid sinusitis which lasts for 12 weeks or more.

childhood electroclinical syndrome

An electroclinical syndrome with onset in childhood between one and 12 years of age.

benign familial infantile epilepsy

An infancy electroclinical syndrome that is characterized by convulsions, with onset at age 3 to 12 months.

amyotrophic lateral sclerosis type 20

An amyotrophic lateral sclerosis with juvenile onset that has_material_basis_in mutation in the HNRNPA1 gene on chromosome 12.

amyotrophic lateral sclerosis type 13

An amyotrophic lateral sclerosis where a mutation that has_material_basis_in the ATXN2 gene on chromosome 12 contributes to suscepitbility.

chronic frontal sinusitis

A frontal sinusitis which lasts for 12 weeks or more. This causes steady headache, localized tenderness and intermittent, purulent nasal and postnasal drainage.

transient tic disorder

A tic disorder that consists of multiple motor and/or phonic tics with duration of at least 4 weeks, but less than 12 months.

juvenile myoclonic epilepsy

A adolescence-adult electroclinical syndrome that is characterized by brief, involuntary twitching of a muscle or a group of muscles (myoclonus) early in the morning with onset between 12 and 18 years.