Kernrechtsfrage
Whether the disability pension could be revised and deleted under Art. 17 LPGA
Extrahierter Entscheid
The pension could not be deleted because the lower court failed to establish a qualifying change in circumstances; the medical diagnoses were essentially the same and the record did not show a valid revision ground.
Extrahierte Begründung
Revision under Art. 17 LPGA requires a material change in circumstances affecting the degree of invalidity. A mere different medical appraisal is insufficient. The experts’ report did not establish an actual change compared with 1998, and no other revision ground was shown.