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The 22-year-old reality fave reassured her fans that the lump is "not serious" in a new YouTube video - but wanted to highlight how important it is to.
Watch the clip below:
The Pretty Little Thing creative director began: "I basically noticed a little lump in my boob, went to get it checked and it was completely fine, completely benign.
"It's a little thing called a fibroadenoma and it's a normal thing to get at this age, small lumps can happen all the time it doesn't mean they're sinister."
She continued: "I went back today to get it checked and it had grown a little bit, again, it doesn't mean it's sinister, it doesn't mean it's dramatic, so the doctor recommended that we did a biopsy."
Molly-Mae has promised to keep her fans updated with the results and encouraged her followers to check their breasts regularly.
"It was not very nice actually considering I'm afraid of needles, but I thought there's not really a way around this," she added.
"I promise it's nothing serious, I don't want it to be a massive thing. I think it's important that I share this with you guys.
"It's an important subject and we should all be checking our boobs and checking for lumps so we can do things like this."
Molly-Mae said that she had been told the mole was fine by two dermatologists but it was a third doctor who noticed it while dealing with a different issue.
AT the time, the star posted an emotional video in which she admitted she burst out crying as soon as she heard the news, and told her family immediately.
Sending Molly-Mae all the well wishes from Tyla!
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