title: Traumatic "pseudoprolapse" of orbital tissues into the maxillary antrum: a diagnostic pitfall.
abstract: Orbital trauma may result in what we term "pseudoprolapse" of orbital tissues: a subperiosteal, submucosal, or intramucosal hemorrhage which creates a balloon-like elevation of periosteum or maxillary sinus mucosa or both associated with a nondisplaced fracture or in some cases no fracture of the orbital floor. This occasionally causes an erroneous radiographic diagnosis indicating a blowout fracture with prolapse of orbital tissues, resulting in unnecessary surgery.
mesh_terms: D000293:Adolescent; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008443:Maxillary Sinus; D009915:Orbit / Q000293:injuries*; D011859:Radiography