How to handle 3D model that was given to me in DICOM format

Hi! I was recently given a 3D model from a cardiologist, but it was given to me as a DICOM file. How could I convert/export this model as an STL or other similar format (OBJ, etc.)? I can view it in slicer, although the view is a bit wonky. I didn’t know 3D models could even be saved in DICOM format, and every time I search to find a solution, the only results I get are if you start from images (CT, etc.) then create the model from that. I only have the 3D model, and not the scans that this model was created from. Any advice is appreciated!

Maybe you can add a screenshot to help us understand what you are seeing.