Khloe Kardashian cancels book tour

Lamar Odom and Khloe Kardashian in 2010. Photo / Getty Images

Khloé Kardashian has cancelled her upcoming book tour.

The 31-year-old star is set to release her debut book, Strong Looks Better Naked, in which she shares her secrets for finding strength of body, mind, and heart, on November 3, 2015, but has axed all of her promotional appearances so she can remain by Lamar Odom's side in hospital in Los Angeles.

A source close to the Keeping Up with the Kardashians beauty told Entertainment Tonight: "Khloé hates to cancel or reschedule anything when it comes to work, but right now, her number one priority is getting Lamar back to good health. She won't leave his side and knows that is the most important place she needs to be right now. She is cancelling her press commitments for the time being."

Khloé, who called off her divorce from Lamar earlier this week as he recovers at Cedars-Sinai Medical Centre in West Hollywood after collapsing at a Nevada brothel last week following a drugs and alcohol binge, previously admitted her decision to end their marriage in December 2013 inspired her to adopt a healthier lifestyle and her new book allegedly goes into detail about his cheating and issues with drug abuse.

Meanwhile the former LA Lakers player reportedly suffered 12 strokes.

The 35-year-old basketball star had the strokes - which are believed to have impacted his motor skills - soon after his collapse, but doctors have only just discovered them following a series of brain scans.

TMZ reports that they have affected Lamar's ability to walk and talk and Lamar is also believed to be suffering from "major kidney failure".

It has been claimed that he may need to undergo a kidney transplant.

A source has claimed the athlete's organs are all functioning at various levels again, but "his kidneys are shot".

The insider told the site that Lamar, who is said to be suffering from aspiration pneumonia, is set to have six hours of dialysis - a process to remove waste and excess water from the blood and is used primarily as an artificial replacement for lost kidney function - a day, but could eventually need a kidney transplant.

Doctors in Los Angeles are also planning to perform more tests on his brain in a bid to establish the full extent of the damage from the strokes.

However, the former Khloé & Lamar star's aunt JaNean Mercer insists he's making "miraculous progress" and "taking a few steps."

In a statement, she told PEOPLE.com: "As Lamar begins a new chapter in his road to recovery, PLEASE continue to uplift him and the family in prayer. He continues to make miraculous progress, taking a few steps in Los Angeles. We couldn't be more overjoyed!"

- Bang! Showbiz