EXCLUSIVE: Rob Kardashian is ready to donate his kidney to best pal Lamar Odom if an organ transplant becomes necessary

Rob Kardashian has offered his kidney to brother-in-law and close friend Lamar Odom should the seriously ill former NBA star need a transplant, Daily Mail Online has learned.

Khloe Kardashian's brother stepped up with the generous offer after it emerged Odom may need a new kidney as his medical treatment continues in Los Angeles.

It's unclear whether Odom and Rob are a compatible match for a kidney transplant, but Rob is willing to undergo medical tests to find out, sources reveal. 

One source told Daily Mail Online: 'Rob is willing to do whatever it takes to help Lamar recover. If that means donating a kidney then so be it, Rob has a big heart and he's willing to step up to help his friend

The 'Special Report' segment of syndicated show The Doctors, will feature a segment on tomorrow's suggesting that Rob will offer his kidney to save best pal, Lamar, if a transplant becomes necessary.

It's believed Odom is currently undergoing regular kidney dialysis treatment at Cedars-Sinai Hospital in LA as he battles to recover.

Odom, 35, was found unresponsive at a Nevada brothel called the Love Ranch more than a week ago, following a three-day $79-000 drugs and drink blow out with two prostitutes.

Police were told that he had used cocaine and sexual-enhancement supplements during his stay at the brothel.

He suffered several strokes and multiple organ failure, and while other organs have returned to functionality, doctors believe his kidneys are still failing.

According to reports Rob has been 'instrumental' in Odom's recovery this past week.

Kpopstarz.com reports that the 28-year-old came out of self-imposed hiding and put aside his personal issues to support his brother-in-law.

Although it's not clear whether Rob has been to hospital to visit with his friend, it has been reported that Odom is wearing a pair of Rob's designer socks from his Arthur George line.

He is said to love a black and white pair that have 'BIG' written on one sole and 'DADDY' on the other.

In recent weeks since Odom was hospitalized, Rob has shared a number of Instagram posts, which is unusual for the typically-reclusive former reality star.

'Praying nonstop for my brother!!' the Keeping Up With The Kardashians star wrote along with an old picture with the former NBA star.