Sterolithographic modelling, now with 3D printing facilities, is establishing itself as a superb resource in pre-operative planning in several fields, in particular oromaxifacial surgery.

CT and MRI data may be used in the modelling process ( with the appropriate protocols ) as illustrated by this case of a destructive inverted papilloma.

The shaded model indicates the extent of the bony destruction in exquisite detail aiding surgical planning - for example in this case the anterior cranial fossa destruction meaning a combined procedure with neurosurgery is indicated.

The case also illustrates the role MRI has over CT in inverted papillomas in distinguishing papilloma from obstructive fluid.