Hemispherectomy Outcome Prediction Scale - Online Calculator

The HOPS Online Calculator expands on the previously published HOPS Clinical Score by adding two additional parameters. The results predict the probability of seizure freedom following hesmispherectomy for drug-resistant pediatric epilepsy at 1, 2 and 5 years respectively.

Please fill in all variables in the form below

Age at Seizure Onset:

Age at Time of Surgery:

History of Previous Surgery:
Yes
No

Seizure Semiology:
Focal only
Generalized +/- Focal

Seizure Etiology:
Hemimegalencephaly
Porencephalic Cyst/ Stroke
Rasmussen's Encephalitis
Cortical Dysplasia and Other Etiologies

Infantile Spasms:
Present
Absent

FDG-PET Results:
Ipsilateral hypometabolism only
Not only ipsilateral hypometabolism
PET Not Available

MRI Lesion:
Ipsilateral MRI lesion only
Ipsilateral MRI lesion and contralateral MRI lesion in white matter and/or cortex
No definite MRI lesion