Maddow said she underwent surgery on Friday after a dermatologist told her she had skin cancer.
The MSNBC anchor opened up in a candid segment, urging viewers to rethink their holiday plans.
The MSNBC host isn't the only one to get emotional on air, as more celebs, including George and Amal Clooney, weigh in on President Donald Trump's controversial policy.
This happened during her live MSNBC show on Tuesday.