Discussing Physical Difference with Toddler

[Carouselfish]

I have a 2 1/2 year old with a minor physical difference on her face/head area. I'm not going to elaborate as will be outing as quite rare to have in the way she has it. It's not immediately obvious and she has only just started to fiddle with the area herself, so won't be long before she notices in the mirror. She's due to start nursery in Jan and I somewhat feel I should casually mention it to her in case another child (mixed-age nursery) notices and brings it up first.
What's the best way of dealing with this? How do I tell her?
For more info - it is operable but we've decided not to do anything until she's old enough to have it under local rather than general anaesthetic, by which point she'll have a say in it too. (I went to school with a boy who died under anaesthetic for a cosmetic procedure ). Since she'll have it all through primary then, I don't want to make her paranoid about it. Help!

Deal with it very matter of factly. "Oh that's your . You were born like that."
At toddler age they don't really notice and even when they do are matter of fact about it.
Dd2 is missing her hand. She'd been at pre-school for nearly a year and did many things with a particular friend including dress up and playing in paddling pool without much clothing.
After about a year this friend turned to her and said "oh you haven't got a hand" , dd2 said "I was born like that" end of discussion.

It's once they are school age the nastiness can set in. Plus you get the relentless questions. "Why are you like that?" "What's that?" etc.

GA anaesthetic is much safer nowadays, and sometimes scarring/healing can be better if done younger. If anything could have been done about dd2's hand then I'd have had it done at about age 3yo before questions start.

Do you think I should introduce the idea first then, Witch before she asks about it? Afraid if I wait another child might mention it first. But that's reassuring about how oblivious/accepting pre-schoolers are.

My son's got a friend with 6 toes. They've been friends from age 3 (and they are now 11). He found out about the extra toe in pre-school and the boy showed him. He very matter of factly announced at dinner this fact. At school, the boy got the odd raised eyebrow when people found out but he's very popular so his personality rather than the toe has become the feature that kids identify with him.

There is quite a nice episode of the Zingzillas called "everyone's different" where they sing a song about people looking different and having different personalities but how everyone being different makes us all the same. If you can find it it might be a way to start the conversation?

*Carousel" It came up naturally as people asked, and she heard me say "she was born like that" or for younger ones "she came out of my tummy like that". I never introduced the subject, and I don't think I would unless there was a very good reason.

My little girl has a limb difference and is almost 3. She's never mentioned it despite curious children asking at soft play etc (or little friends asking as she has to wear modified shoes that are noticeable) we explain to other children "that's how she was born, we are all a bit.different aren't We? look how you have lovely curly hair and mine is straight" we are always positive but move the subject on as we dont want her to feel it is a big issue. The other day I asked which was her little leg and she pointed to the right one so I guess she does understand. When she has questions I will be here to help. It's a tricky one isn't it? She goes to nursery and we have not had any problems at all xx