The rock world was stunned over the weekend after learning Lou Reed had passed away. The musician's cause of death was not originally confirmed with the news of his passing, but the details have now been made public.

Lou Reed had been suffering from liver disease, even going under the knife for a transplant back in the spring. The former Velvet Underground frontman was very optimistic after the initial transplant, describing himself as "a triumph of modern medicine," adding that he felt "bigger and stronger than ever." As if nothing had ever slowed him down, Reed also publicly stated that he looked forward to getting back onstage. [via Ultimate Classic Rock]

Unfortunately, Reed's liver disease took hold once again. This time, it was determined that Reed's affliction could no longer be treated. "We all agreed that we did everything we could," Dr. Charles Miller tells the New York Times. The music legend chose to head home and spend his final days with wife Laurie Anderson.

Tons of musicians have already paid their respects to Lou Reed, but even more have now tweeted their condolences:

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