Michael Jackson underwent surgery to remove a cancerous lesion from his nose just days before his sudden death, according to new reports from WENN.

The pop superstar passed away last week after suffering a cardiac arrest.

Rumours about his cause of death have been swirling ever since, with reports suggesting a lengthy dependence on prescription drugs contributed to his untimely demise.

Now Jackson biographer Diane Dimond has caused a stir with shocking new claims – alleging the Thriller hitmaker had shown early signs of skin cancer.

She tells Usmagazine.com, “Last week, I had two real sources call me and say he’s getting surgery right now for removal of skin cancer off his nose.”

Results from Jackson’s autopsy are expected within weeks.