PBL first semester consists of a single case you get that they tried to integrate within all of the classes for about 2 weeks when all the classes were teaching something related to the digestive system. They ended up telling us what the problem was halfway through in one of the classes which spoiled it for us but whatever. The only group learning is your anatomy group and the discussion groups for intro to clinical medicine where you talk about a book for the semester.
Second semester is a little more involved where our book groups get PBL cases each week for about 4 weeks and we have groups for neuro anatomy lab. Generally except that one point in first semester all the courses are teaching a different subject completely.