Traumatic multiple lower cranial nerve palsy: a case report and review of the literature.

Lower cranial nerve palsy, also known as Collet-Sicard syndrome, is a fairly rare pathology characterized by unilateral palsy of the IX-X-XI-XII cranial nerves. We report a multiple cranial nerve palsy developing after a head trauma that might have been considered negligible. A 16-year-old boy was admitted with swallowing and articulation problems and difficulty lifting one shoulder after a head trauma suffered during a football match. No pathology was revealed in the subsequent imaging. Cranial nerve palsies due to head trauma are very rare. Awareness of the possibility of such a condition, leading to early recognition and treatment, may result in significant functional recovery.

Investigation of ototoxic effects of Taxol on a mice model.

OBJECTIVE: To investigate the effects of taxol on the inner ear in a mice model. METHODS: This study was performed on 112 ears of 56 albino Swiss mice. All animals underwent baseline auditory brainstem response (ABR) testing bilaterally and baseline Peak Equivalent Sound Pressure Levels (PESPLs) were obtained. The mice were randomly assigned to seven groups consisting of one control and six study groups. The control group received no medications while the mice in groups 1-6 received 1 x 60, 1 x 20, 2 x 20, 3 x 20, 4 x 20 and 5 x 20 mg/kg taxol intraperitoneally. Control ABR assessments were performed 3 weeks after the last dose. The animals were then sacrificed while still anaesthetised and the bullae (cochleae included) were dissected from their temporal bones. Haematoxylin-eosin and Masson's trichrome stains were used to demonstrate connective tissue, and periodic acid Schiff (PAS) stain was used to highlight epithelial elements. RESULTS: Significant decreases in the hearing levels were observed in all the groups which received taxol. No correlation was observed between the dose given and the degree of hearing loss. The sections from the control group showed no histopathologic abnormalities while the sections from the study groups demonstrated vacuolisation in the epithelial cells of the spiral limbus, and the stria vascularis, vacuolisation of the fibroblasts and decreasing the number of the fibroblasts in the spiral limbus. CONCLUSION: Taxol causes mild to moderate sensorineural hearing loss in mice. Histopathologically, there were degenerative changes in the cochlea resembling the ones that take place in salisylate and interferon alpha 2a ototoxicity which are thought to be reversible. There was no sensory cell loss. The hearing loss begins with doses less than or equal to 20mg/kg and is not dose dependent after this dose. Hearing monitorisation with audiologic evaluation is strongly recommended before and during the use of the drug in human subjects.

c-myc and bcl-2 Expression in supraglottic squamous cell carcinoma of the larynx.

OBJECTIVES: To evaluate the expression and prognostic significance of c-myc and bcl-2 oncogenes in squamous cell carcinoma (SCC) of the supraglottic larynx. Study design A retrospective cohort study of 61 patients who underwent surgery for SCC of the supraglottic larynx. Gender, age, TNM status, operative procedure, recurrences, and disease-free survival periods were recorded. METHODS: Hematoxylin and eosin-stained sections were reexamined for grade, invasion of tumor margins, lymphovascular invasion, lymphocyte infiltration, and perineural invasion. Immunohistochemical detection of c-myc and bcl-2 oncogenes was performed using monoclonal antibodies. RESULTS: No correlation was observed between either c-myc or bcl-2 and the clinical and histopathologic parameters. Survival analysis revealed no correlation of either c-myc (P = 0.88) or bcl-2 (P = 0.85) with the disease-free survival. c-myc expression was found to be significantly higher in bcl-2-positive patients (P = 0.001). CONCLUSION: Neither c-myc nor bcl-2 had shown to be prognostic factor for laryngeal carcinoma in this present study. Correlation between c-myc and bcl-2 supports the experimental observations of cooperative action between these two genes in tumorigenesis.

Lingual tumors in infants: a case report and review of the literature.

Tumors of the tongue and the base of mouth are seen rarely in children. The incidence of the ones that are large enough to fill the oral cavity is especially low. If not recognized and treated, tongue tumors may obstruct the upper aero-digestive tract and be fatal. A case of a huge lingual cystic tumor mimicking ranula, and obstructing the upper aero-digestive tract, which was diagnosed antenatal and treated during and after the delivery, is presented together with a review of the literature.