A propos d’un rare cas de tumeur Rhabdoïde Teratoïde atypique du systeme nerveux central chez une femme enceinte

Les tumeurs rhabdoïdes tératoïdes atypiques du système nerveux central sont des tumeurs pédiatriques rares et de mauvais pronostic. La littérature rapporte une dizaine de cas chez l'adulte dont deux survenus au cours d'une grossesse. Nous rapportons dans ce travail, le cas d'une femme de 25 ans, enceinte de 14 semaines d'aménorrhée, qui a été opérée pour une tumeur rhabdoïde tératoïde atypique de la fosse cérébrale postérieure. Un  complément thérapeutique a été discuté chez la patiente après interruption thérapeutique de grossesse, mais la patiente fut décédée avant de démarrer le traitement adjuvant. Nous décrivons brièvement les caractéristiques des tumeurs rhabdoïdes, et les particularités de sa prise en charge chez l'adulte

An unusual case of a maxillary sinonasal neuroendocrine carcinoma

It’s a 24 years old female patient who presented with rhinological burning pain evolving since 1 year. She didn’t consult until a blistering lesion filled half of the oral cavity. The initial biopsy of the tumor was interpreted as a round cell tumor process

Oral verrucous carcinoma complicating a repetitive injury by the dental prosthesis: a case report

Verrucous carcinoma (VC) is an unusual, well differentiated, and low-grade type of squamous cell carcinoma, characterized by benign histology and cytology but markedly invasive clinical behavior. They have a predilection for squamous mucosae, particularly those of the head and neck region. Many factors have been associated with its pathogenesis, including the presence of previous skin lesions; VC arising from a prosthesis injury is rare. Here we reported a case of VC of oral cavity a particularly very aggressive, arising from prosthesis injury. Regardless of the treatment modality, given new insights into the possible aggressivity of this tumor, radiotherapy associated to chemotherapy may be a more appropriate primary treatment compared with the significant local morbidity associated with surgery

Corrosion inhibition of iron in 1 M HCl by some gemini surfactants in the series of alkanediyl-α,ω-bis-(dimethyl tetradecyl ammonium bromide)

Three new gemini surfactants in the series of alkanediyl-α,ω-bis-(dimethylalkyl ammonium bromide) were synthesised and tested as corrosion inhibitors of iron in hydrochloric acid medium using gravimetric, electrochemical polarisation and electrochemical impedance spectroscopy (EIS) measurements. Results obtained show that the surfactants studied are good cathodic inhibitors and act on the cathodic hydrogen reaction without modifying its mechanism. EIS results show that the changes in the impedance parameters (RT and Cdl) with concentration of surfactants studied is indicative of the adsorption of molecules of surfactant leading to the formation of a protective layer on the surface of iron. The effect of the temperature on the iron corrosion in both 1M HCl and 1M HCl with addition of various concentrations of 1,2-ethane bis-(dimethyl tetradecyl ammonium bromide) in the range of temperature 20-60°C was studied. The associated apparent activation corrosion energy has been determined.We thank the CNPRST for its financial support (PARS Chim.008) and the TWAS for its Research Grant: 97-121 RG/CHE/AF/AC.Peer reviewe