Had my 20 week scan... have to go to a specialist

So I had my scan and everything is great with our girl’s organs and she is growing right on track. But the Dr. said he wants us to get an ultrasound at a specialist bc “where her chest comes together, there COULD be a small point instead of it being rounded like normal”. He says that this will not cause any problems for her. Has anyone else been told this or know someone who has had this? I know I am not explaining this the best but it’s the best I could do. Thank you ladies!!