TEEN Mom Leah Messer's daughter Ali appeared all grown-up in a new video after receiving amazing news about her muscular distrophy battle.
Ali was diagnosed with Titin Myotonic muscular dystrophy in 2014, a rare form of progressive weakness disease that had existed in less than 20 cases around the world at the time of her diagnosis.
The pre-teen appears to be making great strides in her health based on a clip that Leah shared of her daughter.
The reality star posted the video to her Instagram Stories of Ali smiling at the camera while perched on the arm of the couch.
The 11-year-old donned a brown corteroy jacket and round frames with her brunette locks tied back into french braids.
Leah, 29, captioned the pic: "My girl" along with an image of a sun with the words "you are my sunshine" labeled inside.
She set the video to the song, You Are My Sunshine by Jonathan Roy.
On a previous episode of Teen Mom 2, the family got some exciting news from Ali's doctor regarding her prognosis.
During the virtual appointment, Dr. Tsao revealed promising results from recent studies of hundreds of others diagnosed with the rare disease.
"I wanted to let you know, there have been several hundred patients with titan myopathy. The type of situation that Aliannah has."
Leah gasped in excitement before the doctor continued: "And that's throughout the world. And they've found that many patients like Aliannah's situation with no heart or lung involvement can live into their seventies at least. That is very good information for you to know."
Leah revealed to the camera that she does not want her daughter to "worry" about her "life expectancy" as she grows to understand more about her condition.
She admitted that it was an ongoing fear for her and Ali's father Corey Simms, 31, of how quickly the disease would progress.
She said: "With discovering more cases, it gives me hope for my little girl. I feel like we can look further into her future. It does bring us hope."
The Hope, Grace & Faith author recently shared new testing on a nearly decade-old muscle biopsy may reveal new insight into her daughter's disease as well.
Leah opened up about her daughter's diagnosis on the MTV show's reunion special to hosts Dr. Drew and Nessa Diab.
Dr. Drew said on the show: "A quick thing on Ali's disorder, her muscular dystrophy - I caught that the doctor was changing her prognosis a bit, because they now have a bigger cohort with her rare genetic, specific problem, right?"
Leah replied: "I have so much good news about this - I have just partnered with a not-for-profit organisation and sent her muscle biopsy from 2012 to OSU - Ohio State University..."
The TV star had to take a breath as she started to tear up and mentioned: "Guys this has been a hell of a 12 years... for treatment and a cure...
"If they had us stop looking for a diagnosis, I would never be 12 years into it, we're finding a cure in research."
She added: "Don't tell me f***ing science isn't real because that's my daughter's livelihood."
Shortly after, the young mom shared a video of Ali operating her new hot pink wheelchair.
While using the joystick, Ali steered her wheelchair carefully across the sidewalk.
With glasses on her face, Leah's pre-teen daughter tied her long and curly hair up.
The caption of the clip stated: "My heart."
The Taylor Swift song, Stay Beautiful, played during the short clip.
Ali has often been encouraged to use her power wheelchair to conserve her energy and to prevent harmful falls.
Leah is also mom to Ali's twin sister Aleeah with Corey, and daughter Adalynn, eight, with ex-husband Jeremy Calvert.
We pay for your stories!
Do you have a story for The US Sun team?