| Condition | Relation to Symptoms |
|---|---|
| Subacute sclerosing panencephalitis (SSPE) | A rare chronic progressive encephalitis that occurs several years after a person has measles. It is characterized by the development of myoclonus and cognitive decline, which matches the child's symptoms. |
| Mesial temporal sclerosis | Primarily associated with seizures and epilepsy, but not outside its typical age range without other primary symptoms like fever/rash. |
| Polio | Causes muscle weakness and paralysis but does not directly explain myoclonus or cognitive decline. |
| Measles | Typically presents with fever and rash in the acute phase but without the chronic neurological sequelae described. |
| RBS | 550mg/dL |
| pH | 7.01 |
| Na+ | 158mEq/L |
| Urine glucose | 3+ |
Chloride level in sweat is used in the diagnosis of which disease?