Questione giuridica chiave
Whether the disability pension could be revised and deleted under Art. 17 LPGA
Decisione estratta
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.
Motivazione estratta
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.