Occult plastic intraocular foreign body.

A 34-year-old man was evaluated for posttraumatic endophthalmitis with hypopyon. A previous CT scan of the orbit along with B-scan ultrasonogram failed to confirm the presence of an intraocular foreign body. Nevertheless, at the time of vitrectomy, a polyvinyl chloride (PVC) plastic foreign body was encountered. The atypical posttraumatic uveitis that developed was apparently secondary to the PVC material, as the inflammation cleared rapidly following removal of the foreign body. This case illustrates the necessity for maintaining a high level of suspicion for the possibility of an intraocular foreign body in the event of ocular trauma, even in the presence of unconfirming ancillary tests.