Publications by authors named "C Helenon"

A 23 year old man, expert in karate, complained of sudden movements of right hip during "circular kicks", followed by persistent pain. Arthrography showed synovial plication in joint at upper border femoral neck, with a tongue-like projection from upper recess extending to head/neck junction and provoking bone erosion visible on standard images. Recovery followed resection of the fold.

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A retrospective study of 18 immunodepressed patients with acute invasive pulmonary aspergillosis enabled the radiologic picture of this increasingly frequent opportunist affection to be described, and different manifestations of the disease as a function of underlying conditions to be determined. Two groups could be distinguished: the first of patients with malignant blood diseases (n = 10) when the "aplasia" factor was dominant; the second of patients without blood diseases (n = 8) when the immunodepression was usually induced by a recent increase in corticoid therapy. Neutropenia was not a finding in any of these patients.

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A prospective study in 60 consecutive patients evaluated gain in quality of image using ECG servo-assistance during pulmonary digital subtraction angiography (PDSA). Two groups of 30 comparable patients were randomly allocated to examination with ECG servo-assistance or three images per second technique. Criteria for assessment of quality of image were defined and used to compare results.

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This technique of anti-cancer treatment of hepatic cancers has a twofold interest: it delivers local chemotherapy in direct contact with the tumours and it allows repeated access to the blood supply of the liver without the need for surgery. This second point is particularly emphasized in the form of a technical description of the method of approach to the hepatic arterial system, which is as non-aggressive as possible and which allows permanent vascular access. This study, which required close collaboration between the departments of Vascular Radiology, Radiotherapy and Surgery, was initially considered as a feasibility study of a technique enabling the simple use of implantable vascular access sites.

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A case of sarcoidosis with lesions also localized to the cranial region is reported, and 21 similar cases published in the literature reviewed. Lesions are usually seen as small lacunae in the cranial vault, and are commonly associated with neurologic and cutaneous manifestations of the disease. They appear to be very rare but their frequency is probably underestimated.

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