Jen Arnold, the star of TLC's "The Little Couple," has revealed she is battling a rare form of cancer.

"I have recently been diagnosed with a rare type of cancer and am currently undergoing treatment, including surgery and chemotherapy," Arnold, 39, said in a statement emailed to The Huffington Post. "I am very fortunate as the prognosis is good. While there is never a good time to get news like this, getting it just as we are building our new family is tough in many ways. ... But being surrounded by the love of my husband and our two beautiful children is actually in many ways giving me the strength to fight it even stronger."

The neonatologist and her husband, Bill Klein, have had their lives documented on TLC since the show premiered in 2009. The series has followed them living with skeletal dysplasia, settling down in Texas and trying to have a child. They now have two adopted children: Will, 3, and Zoey, 2.

TLC cameras will also capture Arnold's fight against cancer, according to People.

In October, Klein and Arnold told Glamour they would drop the series if it ever got "too cumbersome," but so far they have been able to manage their schedules. They've also gotten great joys out of doing the show, particularly when they've been able to share personal struggles with viewers.

"The biggest joy from the show is those moments where somebody sends a message or tells us that the show has helped them in some personal way, whether it’s going through the physical challenges or the medical challenges of being little people or the fertility changes and adoption challenges of starting a family," she said. "They share their own personal challenges and the fact that watching the show helps them keep moving forward, honestly that’s what makes the show worthwhile. It’s a really cool thing and makes me feel happy and proud when that happens."