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Injury to the glenoid fossa.

An illustrated case of fracture through the confines of the glenoid fossa by the mandibular condyle is presented. The mechanism of injury and postinjury sequelae of this rarely reported but frequently suspected occurrence are discussed and a treatment rationale proposed. The key to the diagnosis of this entity is an awareness of vector forces directed to the region of the glenoid fossa with or without evidence of subcondylar fracture.