lamina papyracea dehiscence

Dehiscence of the lamina papyracea is an anomaly of the paranasal sinuses represented by a defect of the medial orbital wall. It is thought to be a benign congenital variant of no clinical significance.

Clinical presentation

Almost all patient tend to be asymptomatic, according to one study . Patients will have an absence of prior trauma.

Pathology

There is some speculation that it might be caused by a hyperaerated ethmoid .

Radiographic features

CT / MRI

Dehiscence is usually characterized by protrusion of orbital fat through a defect in the anterior ethmoid bone. The posterior limit of the dehiscence tends to be the basal lamella while the anterior limit may vary.

Differential diagnosis

On imaging consider:

Practical points

Siehe auch: