We present six proven cases of chordoma of the clivus studied by CT and MRI, with special attention to the extent of the tumour and to the signal intensity after intravenous gadolinium. MRI is the best technique for assessing the extent of the tumour but CT is important for showing osteolysis. Our aim was to determine differential diagnostic neuroradiological criteria. Reliable signs of chordoma of the skull base are: posterior extension to the pontine cistern; a lobulated, "honeycomb" appearance after gadolinium: the swollen appearance of the bone in the early stages; bone erosion on CT and frequent extension to critical structures such as the circle of Willis, cavernous sinuses and brain stem.
We report two cases of children with malignancies and subpleural nodules found on computed tomography (CT) scan. In both cases the diagnosis was anthracosis. This pathologic condition has never been reported in children. Causes of anthracosis include a smoking environment, living in urban areas and air pollution.
Cet article s’intéressera aux différents refuges affectionnés par Gabrielle Roy et qui
auront été les plus importants dans son processus de création, en rapport avec l’espace intérieur
de l’écrivaine au moment de l’écriture.
Quoique publiés en 1973 et 1975, The Anxiety of Influence et A Map of Misreading de Harold Bloom ne cessent de raviver des questions fondamentales en littérature, telles que celles de la filiation littéraire, de l'influence des précurseurs et leurs conséquences dans le processus créatif. L'écrivain doit-il déconstruire l'oeuvre de ses modèles pour bâtir la sienne ou doit-il construire la sienne à partir de celle de ses prédécesseurs? Les ouvrages de Bloom sont souvent cités dans les études portant sur l'intertextualité ; ce dossier « Comment écrire après…? » se propose également d'orienter le
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