Revered U.S. movie critic Roger Ebert's cancer has returned.

The acclaimed writer, who was first diagnosed with the disease in his thyroid gland in 2002, was hospitalised late last year (12) with a fractured hip, and during his medical visit doctors discovered the return of cancerous cells in his body.

The 70 year old announced the news in a post on his official blog on Tuesday night (02Apr13), revealing he will be cutting back on his work as he battles the illness once more.

He writes, "The 'painful fracture' that made it difficult for me to walk has recently been revealed to be a cancer. It is being treated with radiation, which has made it impossible for me to attend as many movies as I used to... My intent is to continue to write selected reviews but to leave the rest to a talented team of writers handpicked and greatly admired by me...

"In addition to writing about movies, I may write about what it's like to cope with health challenges and the limitations they can force upon you. It really stinks that the cancer has returned and that I have spent too many days in the hospital... So on this day of reflection I say again, thank you for going on this journey with me. I'll see you at the movies."

Ebert, who is currently working on a documentary about his life with Martin Scorsese and Steven Zaillian, also battled cancer in his salivary glands, which robbed him of his ability to speak and eat solid foods due to invasive jaw surgery.