MARK RALSTON/AFP/Getty Images

Nearly a month after Lamar Odom was discovered unconscious in a legal Las Vegas brothel, he is still struggling with communication and mobility, friends and family told TMZ.

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Sources told the entertainment-news site that he has made little progress in recent weeks and is only able "to speak a word here and there, and at times he seems 'empty.' "

Doctors fear that he may have suffered "significant brain damage" because "he cannot recognize longtime friends and even family members when they come to visit," the report says.

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He is being treated at Sunrise Hospital & Medical Center, where he was transported last month after he was discovered unconscious in a legal Nevada brothel with cocaine and other substances reportedly in his system.

Read more at TMZ.