![]() ![]() Portions of the orbital septum can sometimes be discerned on imaging ( Figs. The orbital septum is a thin sheet of fibrous tissue that originates in the orbital periosteum and inserts in the palpebral tissues along the tarsal plates. For example, the orbital septum provides a barrier against the spread of periorbital infections into the orbit proper. Orbital infections can arise from primary infection of the sinuses, skin, or teeth septicemia or penetrating injury.Ĭertain anatomic structures play a role in how infections progress. In addition to patient history, the constellation of imaging findings can often yield insights into how the infection arose. Some forms of orbital infection can evolve into other types, and different types can coexist.īesides delineating the extent of infection and potential complications, it is helpful to make an attempt to identify the source of an orbital infection on imaging, since this may influence treatment. In addition, orbital infections that are not specifically addressed by this classification include dacryocystitis, dacryoadenitis, and endophthalmitis. Subperiosteal abscess, which may lead to true infection of orbital soft tissues Intraorbital abscess, which may arise from collection of purulent material in an orbital cellulitis Orbital abscess with or without intracranial complications Orbital cellulitis with or without intracranial complications There are various forms of orbital infection, including those listed in the Jain-Rubin classification: ![]()
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