Since the TMZ article mentions his "fragile mental state", perhaps these recent surgeries were heart related.
This is an article from 2001, there is probably more evidence-based research out there now, but depression following open heart surgery is pretty common:
"There are no conclusive statistics about the incidence of depression after bypass surgery. Estimates vary widely from fewer than a third of patients to more than three-quarters. Some experts believe that the rate of depression after bypass surgery is much higher than that of other types of surgery, but not everyone agrees. "
http://www.nytimes.com/2001/11/27/health/facing-up-to-depression-after-a-bypass.html?pagewanted=all
Continued prayers for Lamar and his loved ones.
This is an article from 2001, there is probably more evidence-based research out there now, but depression following open heart surgery is pretty common:
"There are no conclusive statistics about the incidence of depression after bypass surgery. Estimates vary widely from fewer than a third of patients to more than three-quarters. Some experts believe that the rate of depression after bypass surgery is much higher than that of other types of surgery, but not everyone agrees. "
http://www.nytimes.com/2001/11/27/health/facing-up-to-depression-after-a-bypass.html?pagewanted=all
Continued prayers for Lamar and his loved ones.