Time reversal of water waves.

We present time reversal experiments demonstrating refocusing of gravity-capillary waves in a water tank cavity. Owing to the reverberating effect of the cavity, only a few channels are sufficient to reconstruct the surface wave at the point source, even if the absorption is not negligible. Space-time-resolved measurements of the waves during the refocusing allow us to quantitatively demonstrate that the quality of the refocusing increases linearly with the number of reemitting channels.

[Myospherulosis of the maxillary sinus].

Background: We present a case of a myospherulosis, describe the underlying cause and discuss ways of preventing its development.

Case Report: A 35-year-old man presented myospherulosis of the maxillary sinus caused by an antibiotic ointment placed in the sinus three years earlier during a Caldwell Luc procedure. The patient underwent a second Calwell Luc procedure.

[Forestier disease presenting as dysphagia].

Introduction: Forestier's disease is characterized by hyperostosis of the anterolateral margin of the vertebral bodies. Cervical spine involvement rarely leads to dysphagia.

Observation: A 76 year-old man suffered from progressive dysphagia, feeling of suffocation and left cervical pain.

Complete cervical tracheal rupture in children after closed trauma.

The authors report the case of a 5-year-old boy who received a blow from a heavy metallic bar on the front of the neck and presented with a complete rupture of the cervical trachea. Such a rupture is exceptional in children because of the consistency of the cartilage but can occur when the neck is in extension and the glottis is closed. A rigid endoscopy allowed the rupture to be diagnosed, to restore the airway, to prepare the cervicotomy, and the suturing of the trachea.

Pituitary adenomas with infra-sellar extension into the nasopharynx.

Three cases of pituitary adenomas with infra-sellar extension into the nasopharynx and the nasal cavities are reported. The clinical signs were epistaxis, nasal obstruction, painful sinuses and purulent rhinorrhoea. The initial diagnostic hypothesis was that of a carcinoma of the nasopharynx or the sinuses in all three cases.