Questione giuridica chiave
Whether the conditions for revision of the disability pension under Art. 17(1) ATSG were met
Decisione estratta
No legally relevant change in the facts affecting earning capacity was established; the existing quarter pension remained unchanged.
Motivazione estratta
Although the medical diagnosis evolved, the decisive work capacity for adapted light work remained at 80%, and the claimant failed to show a relevant deterioration compared with the comparison date.