The US military has found 94 cases of confirmed or alleged abuse of prisoners by its troops in Iraq and Afghanistan, a Senate hearing has been told.
The report was ordered when allegations about Abu Ghraib jail came to light
Though some cases have been reported before the number is significantly higher than previously acknowledged.
But the report said no systemic problems contributed to the abuses.
The report was ordered after abuse allegations at Baghdad's Abu Ghraib prison first came to the attention of senior army officials in February.
The scandal erupted in April as images of Iraqi prisoners being subjected to a wide range of abuses were shown on TV.
It resulted in seven members of the US military police being charged. One of them, Jeremy Sivits, has been jailed for a year and discharged from the service.
The scandal raised questions about abuses in other areas, such as Afghanistan and Guantanamo Bay.
The hearing was called at short notice, so that senators could hear the findings of the report, drawn up by the army inspector general, before the chamber begins its summer recess on Friday.
The report said the cases included theft, physical assault, sexual assault and death.
But it described them as unauthorised actions taken by individuals, in some cases combined with the failure of a few leaders to provide supervision and leadership.
"The abuses that have occurred are not representative of policy, doctrine or soldier training," the report said.
However, the report later quoted a February report by the International Red Cross Committee alleging that methods of ill treatment were "used in a systematic way" by the US military in Iraq.
The BBC's Nick Childs at the Pentagon says the report is unlikely to satisfy those who have criticised the military over abuse of prisoners.
Senator Carl Levin, the senior Democrat on the armed services committee, has already said it is difficult to believe there were not systemic problems.