Delayed enophthalmos following a minimally displaced orbital floor fracture.

We describe a case of an orbital floor fracture resulting in obstruction of the maxillary sinus ostium by herniated orbital contents. Our patient had delayed enophthalmos in a manner similar to silent sinus syndrome or imploding antrum syndrome. Obstruction of the maxillary sinus ostium by orbital contents carries the potential for delayed-onset enophthalmos and therefore suggests an additional indication for orbital floor fracture repair.