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Biomedical subjects

D Doyon

Publications and source records attributed to D Doyon.

222 records · Page 13Linked to original sources
PubMedDate not supplied

[Non-surgical extraction of iatrogenic intravascular foreign bodies : a report on 4 cases and review of the literature (author's transl)].

Four cases of non-surgical extraction of iatrogenic vascular foreign bodies are reported, in two of which a basket sound was used, and two others a metallic collar. The percutaneous route was used without denuding the veins. A review of the literature showed 83 cases of non-surgical extraction of vascular foreign bodies, and the methods and materials used are discussed.

Adult↗
PubMedDate not supplied

[Normal and pathologic imaging of the pituitary stalk].

Study of the pituitary stalk pathology about six demonstrative cases. This illustrative cases are described after review of literature, anatomy and imaging modalities. CT and MRI are very sensitive technics but not very specific.

Humans↗
PubMedDate not supplied

[Secondary malignant tumors of the vestibulocochlear and facial nerves].

INTRODUCTION: Neuromas and meningiomas represent by far the most frequent tumors of the cerebellopontine cistern (respectively over 80% and over 10%). Secondary malignant tumors are exceptional. METHOD: Presentation of four cases of malignant tumors of the cerebellopontine cistern, either revealing or complicating a primary tumor: a bronchial cancer, a cancer of the kidney, a medulloblastoma and a lymphoma. Patients were studied in T2- and T1-weighted high-field MRI sequences before and after gadolinium injection. RESULTS: The four tumors were enhanced by gadolinium and shown to invade the internal auditory canal, including one bilateral involvement. In most cases, the tumors were slightly heterogeneous and had irregular margins. CONCLUSION: These observations suggest that other diagnoses than acoustic neuroma should be taken into account.

Adenocarcinoma↗
PubMedDate not supplied

[Techniques for opacification of the lumbar spinal venous plexuses (author's transl)].

No single technique exists for lumbar phlebography. Whilst catheterisation of the ilio-lumbar veins is always the first step, it should be routinely followed by injection of the lateral sacral veins whenever the leel L5-S1 is clinically suspicious. Finally, when only poor opacification of the longitudinal epidural plexuses is obtained by filateral injection of the ilio-lumbar or ilio-lumbar and sacral systems, catheterisation of the vein in L2 on the right or L3 on the left makes it possible in virtually all cases to obtain satisfactory filling of the lumbar plexuses. It may be considered at the present time that, from a technical standpoint, failures of lumbar phlebography by bilateral femoral catheterisation do not exceed 1% of cases.

Humans↗