[Towel clip reduction of zygomatic arch fracture]. / Réduction des fractures de l'arcade zygomatique par pince fixe-champ.

INTRODUCTION: Isolated fractures of the zygomatic arch (IFZA) are common in maxillofacial emergencies. They usually require a closed reduction. Several reduction techniques have been proposed. The reduction using a Ginestet-type hook is the gold standard technique. DISCUSSION: The reduction using a towel clip under local anesthesia is an economical, simple, reliable and safe alternative technique for the reduction of IFZA. We describe this procedure.

[Two cases of sinus histiocytosis with massive cervical lymphadenopathy (Destombes-Rosai-Dorfman disease)]. / Deux cas d'histiocytose sinusale ganglionnaire cervicale de Destombes-Rosai-Dorfman.

INTRODUCTION: Sinus histiocytosis with massive lymphadenopathy is a rare disease. Its location is ubiquitous, but the most frequent is cervical lymph nodes. OBSERVATION: We report 2 cases of sinus histiocytosis with massive lymphadenopathy. The patients were respectively 9 and 30 years of age. They both presented with bilateral cervical polylymphadenopathy with a cervical compression syndrome in the first patient. The diagnosis was made histologically by demonstrating histiocyte emperipolesis, in the first case, and by immuno-histochemistry in the second. The treatment was corticosteroids, resulting in an almost total involution. DISCUSSION: Sinus histiocytosis with massive lymphadenopathy is a clinical and a specific pathology, but its etiopathogenesis remains to be elucidated. The cervical localization is common. The definitive diagnosis is histological. There is currently no codified treatment. The outcome is usually favorable, apart from mechanical and systemic complications that are important prognostic factors.

Intra-mandibular adenoid cystic carcinoma.

Intra-mandibular localization of adenoid cystic carcinoma is rare. This tumor is characterized by progressive local, regional, and distant aggressiveness. We reviewed the latest data on this rare type of cancer with a small number of reported cases, alack of consensus for its treatment, and its bad prognosis.

[Submental intubation in maxillofacial traumatology]. / L'intubation sous-mentonnière en traumatologie maxillofaciale.

INTRODUCTION: Free access to the upper respiratory tract may be a challenge for the management of severe facial trauma. Tracheotomy is routinely used in this case. Submental intubation is little used, but it is an alternative to tracheotomy. MATERIAL AND METHOD: A retrospective study was made over 1 year. Sixteen patients with facial smash were included. Patients who had undergone an immediate tracheotomy or a long-term intubation were excluded. Submental intubation was used in all patients with the same protocol. The studied data was: operative time, duration of ventilator disconnection, postoperative complications, and scar assessment. RESULTS: The average operative time was seven minutes. No speech disorder, hematoma, or postoperative infection was observed. The scar was barely visible in 13 cases out of 16. DISCUSSION: Submental intubation seems to be a reliable, simple and easy to learn technique. A perfect knowledge of the local anatomy allows opening the airway without any risk of hematoma. Incision packing reduces the bacterial inoculum and infectious risk. The residual scarring is minimal.

[Facial wounds: an epidemiological review of 850 cases]. / Plaies faciales : étude épidémiologique de 850 cas.

BACKGROUND: Facial wound are among the most frequent emergencies. They often affect a young population. We studied the epidemiological profile of facial wounds admitted in our hospital. PATIENTS AND METHODS: This prospective study was carried out in the Emergency Unit from June 2008 to June 2009. It included all patients having presented with at least one facial wound. The analysed parameters were patient, trauma, and wound characteristics. RESULTS: Eight hundred and fifty patients were included, 20% of whom were female patients. The most frequent etiologies were traffic accidents for men, assault for women, and domestic accidents for children. Alcohol abuse was involved in 12.4% of the cases. The most frequent wound localization was frontal (35.4%). A craniofacial organ (eye, brain…) was affected in 6.1% of the cases; the wound was associated to a craniofacial fracture in 9.6% of the cases, and to an extrafacial lesion in 22% of the cases. DISCUSSION: Facial wounds are a frequent emergency. They are predominant in young male patients. The high frequency of traffic accident and alcohol abuse requires an adequate prevention policy.

[Medial cleft lip: one diagnosis masking another]. / Les fentes labio-palatines médianes : un diagnostic qui en cache un autre.

UNLABELLED: Median cleft lip and palate are one of the facial manifestations of holoprosencephaly, a brain malformation resulting from a defect in the development of the prosencephalon, the embryonic precursor of the forebrain. It can occur in isolation or as part of a broader pattern of malformation in many different syndromes. The diagnosis of holoprosencephaly requires a complete malformative assessment. FIRST CASE: a newborn baby seen at birth for a median cleft lip associated with a complex craniofacial malformation. The search for malformations revealed the absence of the median cerebral structure and trisomy 13. The baby died at 48 h. SECOND CASE: A 28-day-old newborn baby consulting for a median cleft lip and palate. The brain ultrasounds showed no anomalies of the median cerebral structure. The malformative assessment revealed no other malformation. DISCUSSION: Holoprosencephaly is a complex developmental brain malformation. From the advances in neuroimaging and genetics, our understanding of the etiology and pathogenesis of this condition has advanced dramatically. This advance should lead to improved management of common medical complications and more optimal family counseling. Surgical treatment is the preferred therapy for viable malformations.

The role of female accessory glands in maternal inheritance of phase in the desert locust Schistocerca gregaria.

Accessory glands of crowd-reared females of Schistocerca gregaria were ligatured from the lateral oviducts. Hatchlings resulting from egg pods laid after the treatment showed a significant shift towards solitarious behaviour as compared to hatchlings from control-treated females. Morphometric measurement of hatchlings revealed no consistent difference between ligatured and control females, however, one ratio (hind femur length/vertex width) was approaching significance. Hatchlings from eggs of crowd-reared females behaved solitariously when freshly laid eggs were washed with a saline solution. Gregarious behaviour could be restored when washed eggs were treated with a saline extract of the accessory glands. The colouration of hatchlings was not affected by any treatment. Our findings implicate the accessory glands in the production, release or activation of the recently reported gregarizing factor found in the egg pod foam [McCaffery, A.R., Simpson, S.J., Islam, M.S., Roessingh, P., 1998. A gregarizing factor present in the egg pod foam of the desert locust Schistocerca gregaria. Journal of Experimental Biology 201, 347-363].

Effects of sensory stimuli on the behavioural phase state of the desert locust, Schistocerca gregaria.

The nature of stimuli, emanating from other locusts, which are effective in inducing gregarization in the desert locust was investigated. Isolated-reared fifth-instar nymphs were subjected to tactile, visual and olfactory stimuli, presented singly and in combination, and the effect on the behavioural phase state was quantified using logistic regression analysis. Tactile stimulation provided by rolling paper spheres proved to be highly gregarizing, whether presented alone or in combination with the other stimuli. Olfactory and visual stimuli together caused partial behavioural gregarization. Visual stimulation alone was weakly gregarizing after prolonged exposure, while olfactory stimuli alone were ineffective. Nymphs and pre-reproductive and reproductive adults of both sexes were also treated with synthetic adult male `aggregation' pheromone blend (Torto et al., 1994, Journal of Chemical Ecology 20, 1749). No effect of this blend was found on the behavioural phase state, even when visual stimuli were present. Non-locust related stimuli, including wheat odour and flashing lights, were also tested on nymphs. Neither induced any change in the behavioural phase state, indicating that increased sensory flow is not a sufficient explanation for locust-induced behavioural phase change.