In the case of acute, poorly responding frontal sinusitis, frontal sinus trephine and irrigation are performed. The irrigation catheter may be left in place for several days.

The frontal sinuses show the most anatomic variation such as congenital absence or hypoplasia (Fig. 1). The sphenoid sinuses, located posteriorly, form last. Anatomy of Sinuses-Artist's Rendition.

Figure 1. CT with coronal reconstruction showing a slightly hyperdense content as related to the cerebral tissue within the left frontal sinus, with herniation into the orbital cavity. MRI is useful ...

Individual identification based on radiographic frontal sinus comparison is considered a reliable means of establishing positive identification. An ante mortem craniography was compared to a ...