No. Most gallbladder removal scars are small. That's why they call it "bandaid surgery!" they should be less than an inch in length, although the one in the umbilicus can be a little larger if the gallbladder is full of stones or has a really large stone. There is now no reason to fear removing the gallbladder because of the scar as most people can have endoscopic removal.
About 10-15mm. Incision is about 10-15mm, assuming normal healing the abdomen scars well.
Usually NOT. The incisions are only large enough to permit placement of skin protection sheaths, and are closed following the surgery. In some cases, it is advised to let the scars mature (months) before deciding to have any revision. Revisions can be done effectively as the repair can be performed in layers and without the distortion that occurs with the ports for the scopes.
No. Typically less than 2 cm each (usually more like 1 cm). There is often a bigger incision, but this is usually hidden in the belly button.
Is scar tissue from a gallbladder removal via laparoscopy dangerous at all? Should I leave it like this?
Adhesions, This scar tissue to which you refer, called "adhesions", will always occur after surgery - part of the post-operative healing process. At times, they can cause obstruction of the intestines which may require hospitalization or even more surgical management, but there's nothing we can do preemptively to not make that happen. Thankfully this is not the norm. Read more...