[Quality and safety policy implementation for a new radiotherapy device]. / Mise en place d'une politique de qualité et de sécurité lors de l'installation d'un nouvel équipement dans un service de radiothérapie.

Modern radiotherapy techniques (intensity-modulated radiotherapy, volumetric-modulated arctherapy, image-guided radiotherapy) or stereotactic radiotherapy are in expansion in most French cancer centres. The arrival of such techniques requires updates of existing equipment or implementation of new radiotherapy devices with adapted options. With the arrival of these new devices, there is a need to develop a quality and safety policy. This is necessary to ease the process from the setup to the first treated patient. The quality and safety policy is maintained to ensure the quality assurance of the radiotherapy equipment. We conducted a review of the literature on the quality and safety policy in the French legal framework that can be proposed when implementing a new radiotherapy device.

[Silent sinus syndrome associated with intrasinusal ossification]. / Syndrome du sinus silencieux et ossification intrasinusienne.

BACKGROUND: The silent sinus syndrome (SSS) is a rare cause of diplopia and facial asymmetry. It is commonly attributed to a sinus atelectasis secondary to ostiomeatal obstruction. Surgical dissection of the maxillary sinus mucosal lining is known to cause auto-obliteration by bone formation. CLINICAL CASE: A 45 year-old female patient was referred for vertical diplopia with enophthalmia, and a slight depression of the left cheekbone. Antrostomy was performed for chronic obstructive maxillary sinusitis six months before. CT scan revealed a major collapse of superior, anterior, and posterior left maxillary sinus with expansion of the orbital volume. The de novo maxillary sinus ossification evolved over two years of follow-up. It was normal lamellar bone. The left orbital floor was rebuilt. Diplopia progressively resolved. DISCUSSION: The association of SSS and intraluminal osteogenesis has never been reported. The first might be due to a peroperative dissection of the maxillary sinus mucosal lining. SSS was due to meatal obstruction secondary to inadequate antrostomy.