Sony's cyber-security nightmare deepened last night after it was revealed hackers infiltrated its database and stole medical information of dozens of it employees and their children and posted it online.

It is the latest in a string of damaging cyber attacks on the entertainment giant's computer system that have given the public an unfiltered glimpse into the way Hollywood often does business: down and dirty, with scant mincing of words.

They include salary information as well as the personal emails in which executives insult a host of celebrities, including Angelina Jolie, Michael Fassbender and even Barack Obama.

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It is the latest in a string of damaging cyber attacks on the entertainment giant's computer system that have given the public an unfiltered glimpse into the way Hollywood often does business: down and dirty, with scant mincing of words.

But today it was revealed that the revelations were not confined to entertainment industry spats, but included 'detailed and identifiable health information on employees, their children or spouses,' according to Bloomberg.

Bloomberg adds: 'One memo by a human resources executive, addressed to the company's benefits committee, disclosed details on an employee's child with special needs, including the diagnosis and the type of treatment the child was receiving.

'The memo discussed the employee's appeal of thousands of dollars in medical claims denied by the insurance company.'

The leak also included the birth dates, gender, health condition and medical costs of 34 Sony employees, their spouses and children who had particularly high medical bills, as well as those who had premature births, cancer, kidney failure and alcoholic liver cirrhosis.

Demands: Hacking collective, calling itself The Guardians of Peace, is demanding that the studio brings to a halt the Seth Rogen-James Franco comedy 'The Interview,' which focuses on an assassination plot on North korean leader Kim jong Un. it premiered in Los Angeles yesterday (above)

'This stuff will haunt all those people the rest of their lives,' Deborah Peel, director of Patient Privacy Rights told Bloomberg. 'Once it's up on the Internet it is up in perpetuity. This is a thousand times worse than that other stuff. Health information is the most sensitive information about you.'

The information was garnered from an email exchange between the company's health insurer, Aetna Inc. and its human resources department.

In the memo about the child with special needs, Sony's HR department went into great detail regarding the child's condition, the type of treatment the child was receiving and where.

Peel told Bloomberg that it was unnecessary to go into so much detail about the child, adding: 'Why they are doing this with the name and location and all the identifiable information is beyond me.'

Hackers calling themselves 'Guardians of Peace' have been releasing documents since the initial attack against Sony on November 25, which shut down the studio's entire computer system.

The group is demanding that the studio brings to a halt the Seth Rogen-James Franco comedy 'The Interview,' which focuses on an assassination plot on North Korean tyrant Kim Jong Un. The film has been denounced by North Korea but premièred Thursday in Los Angeles.