[Management of Stent-graft migration with obstruction of supra-aortic vessel during an endovascular procedure for aortic isthmus rupture]. / Migration d'endoprothèse thoracique avec occlusion des troncs supra-aortiques en per-procédure pour rupture isthmique ; prise en charge.

The endovascular approach is widely used in the management of aortic isthmic rupture. Even if it remains less invasive than conventional surgery, a life-threatening complications are possible. We report the case of a young female patient presenting a stent-graft migration during the deployment with total obstruction of the supra-aortic vessels. We describe the therapeutic management with a cerebral rescue procedure followed by a delayed surgical repair.

[Post treatment thoracic aorta: CT and MR imaging features]. / Comment je contrôle une aorte thoracique après traitement en scanner ou en IRM?

Follow-up after thoracic aortic repair relies on CT and MR imaging in order to detect complications from the treatment or underlying pathology. Following prosthetic repair of the ascending aorta, peri-prosthetic hematoma and anastomotic complications (leak, false aneurysm, peri-prosthetic circulation) should be excluded. Following treatment with a covered stent, the location of the prosthesis and its skeleton should be evaluated and endo-leaks and wall defects should be excluded. Following treatment of a dissection, there often is persistent flow in the false lumen. The entry points into the false lumen should be identified. The caliber of the aorta at different levels should be assessed. Signs of ischemia (static and dynamic) and acute complications should be excluded in patients with acute chest pain. Atherosclerosis and dysplastic conditions may affect other segments of the aorta (aneurysm, dissection, hematoma). Follow-up is performed with CT, if possible, when high-resolution evaluation is required, of with MRI in other cases. Follow-up is obtained on a yearly basis or twice a year when an evolutive process is identified. It is performed every two to five years when the risk is low. Follow-up should be suggested by the radiologist.

[Mediastinal haematoma: A little known complication of ultrasound-guided trans-bronchial lymph node aspiration (EBUS-TBNA)]. / Un hématome médiastinal : complication méconnue d'une ponction transbronchique échoguidée.

INTRODUCTION: Endobronchial ultrasound-guided trans-bronchial needle aspiration (EBUS-TBNA) has emerged as a minimally invasive, highly accurate technique for sampling intrathoracic lymph nodes. The complication rate after EBUS-TBNA is estimated at between 0.22% to 1.44%. Analysis of the different series of EBUS-TBNA reveals that mediastinal haematoma has not been described as a complication. CASE REPORT: We describe the case of a 65-year-old-man who underwent an EBUS-TBNA of a subcarinal lymph node. Few days later the patient presented with haemoptysis of average amount associated with a haematoma in the subcarinal area seen on CT-scan. It was suggested that puncture of a bronchial artery occurred during passage of the needle. This complication occurred during the change from treatment by low molecular weight heparin to antivitamine K. The patient was monitored in the intensive care unit and received medical treatment only. CONCLUSIONS: This patient developed a complication after an EBUS-TBNA that is rarely described and probably under diagnosed. This complication occurred during the change between two anticoagulant treatments, which requires special attention in this particular context.

[Significance of the contralateral approach combined with venous deocclusion in a case of biventricular defibrillator implantation]. / Intérêt de l'abord controlatéral associé à une désobstruction veineuse en cas d'implantation d'un défibrillateur biventriculaire.

The authors report the case of a patient in whom a biventricular defibrillator was successfully implanted from the right, following a failed approach from the left. The patient had chronic thrombosis of the subclavian vein, and this procedure was only possible after venous deocclusion and the positioning of an endoprosthesis. The authors underline the significance of the contralateral approach in case of difficulties in inserting pacing devices, as well as the complementary benefits of interventional radiological procedures in order to allow vascular access in cases of chronic venous thrombosis.

Midterm results of internal iliac artery aneurysm embolization.

OBJECTIVE: We describe the immediate and midterm results of endovascular treatment of isolated internal iliac artery aneurysms (IIAA). METHODS: This was a retrospective single center study. From 2005 to 2014, data from 20 consecutive patients who had an embolisation for an isolated atherosclerotic internal iliac artery aneurysm underwent an endovascular treatment. We retrospectively evaluated the technical aspects and outcomes. RESULTS: The mean aneurysm diameter was 42mm (range 30-97mm). No perioperative deaths or treatment failures occurred. No endoleaks or secondary aneurysm ruptures were observed during the follow-up. Three patients experienced disabling buttock claudication, which was spontaneously remissive in two cases. No relationship was found between buttock claudication and the patency of the contralateral internal iliac artery and the deep femoral artery. Six patients (30%) died during follow-up. Among these, three patients died due to cardiovascular events. The mean follow-up interval was 24 months (range 6-96 months). CONCLUSION: The endovascular treatment of isolated internal iliac artery aneurysm is safe in the short-term and could prevent secondary aneurysm rupture at midterm.

Indications for embolization in a French level 1 trauma center.

Abdominal trauma accounts for nearly 20% of all traumatic injuries. It often involves young patients sustaining multiple injuries, with a high associated mortality rate. Management should begin at the scene of injury and relies on a structured chain of care in order to transport the trauma patient to the appropriate hospital center. Management is multi-disciplinary, involving intensive care specialists, surgeons and radiologists. Imaging to precisely define injury is best performed with whole body dual phase computed tomography, which can also identify the source of bleeding. Non-operative management has developed considerably over the years: this includes selective embolization in case of active bleeding or vascular anomalies in stable or stabilized patients after resuscitation. Embolization has become one of the corner stones of abdominal trauma management and interventional radiologists must play an active role on the trauma team. This overview details the different embolization procedures according to the involved organ and embolic agent used.

Management of penetrating abdominal and thoraco-abdominal wounds: A retrospective study of 186 patients.

This is a single center retrospective review of abdominal or abdomino-thoracic penetrating wounds treated between 2004 and 2013 in the gastrointestinal and emergency unit of the university hospital of Grenoble, France. This study did not include patients who sustained blunt trauma or non-traumatic wounds, as well as patients with penetrating head and neck injury, limb injury, ano-perineal injury, or isolated thoracic injury above the fifth costal interspace. In addition, we also included cases that were reviewed in emergency department morbidity and mortality conferences during the same period. Mortality was 5.9% (11/186 patients). Mean age was 36 years (range: 13-87). Seventy-eight percent (145 patients) suffered stab wounds. Most patients were hemodynamically stable or stabilized upon arrival at the hospital (163 patients: 87.6%). Six resuscitative thoracotomies were performed, five for gunshot wounds, one for a stab wound. When abdominal exploration was necessary, laparotomy was chosen most often (78/186: 41.9%), while laparoscopy was performed in 46 cases (24.7%), with conversion to laparotomy in nine cases. Abdominal penetration was found in 103 cases (55.4%) and thoracic penetration in 44 patients (23.7%). Twenty-nine patients (15.6%) had both thoracic and abdominal penetration (with 16 diaphragmatic wounds). Suicide attempts were recorded in 43 patients (23.1%), 31 (72.1%) with peritoneal penetration. Two patients (1.1%) required operation for delayed peritonitis, one who had had a laparotomy qualified as "negative", and another who had undergone surgical exploration of his wound under general anesthesia. In conclusion, management of clear-cut or suspected penetrating injury represents a medico-surgical challenge and requires effective management protocols.

["Isolated" thrombi of the aorta: retrospective study of 10 observations]. / Thromboses aortiques "isolées": analyse rétrospective de 10 observations.

INTRODUCTION: Thrombi of the aorta are mostly linked to atheromatous plaques on the aortic wall of patients with classical risk factors for cardiovascular disease. The thrombus rarely appears on sound arteries and in this case is called "isolated". METHODS: We present a retrospective study of ten patients with "isolated" thrombi of the aorta treated between 1995 and 2004 at the Hospital of Grenoble. The following parameters were considered in this analysis: age of the patient when the thrombosis appeared, gender, cardiovascular risk factors, revealing mode of the thrombus, its anatomic location, biological and morphological exploration results and the treatment performed. Patients with atheromatous plaques on the aortic wall were excluded. RESULTS: In eight out of ten cases the clinical presentation of the aortic thrombus is an acute ischemia of a limb. In all of the cases the diagnosis was confirmed by an injected thoraco-abdominal scan apart from one case where the primary diagnosis was made using an arterial echo-Doppler. The search for the thrombophilia can be considered to have been exhaustive in seven cases. For the search of an anti-phospholipid antibody syndrome this has been achieved in eight cases. Two etiologic diagnoses could be placed. The first one revealed during the aortic thrombosis a neoplasia of adenocarcinomic type without any primary identified. The second case was an essential thrombocythemia diagnosed one year after the thrombosis. The eight other cases remained "isolated" after an average 2.5 years follow-up. DISCUSSION: Less than one hundred cases of aortic thromboses could be identified in the literature. The cases developing on a sound artery are difficult to quantify and the word "isolated" thrombus may be sometimes used by default. The hypothesis of an isolated focal atheromatous plaque or of inflammatory pathologies inducing a thrombus can be an example. The biological and morphological explorations have to be exhaustive even if in most of the cases they are not sufficient for the diagnosis. Therapy calls for anti-coagulation but is not standardized. The clinical follow-up appears to be essential since pathological conditions can possibly develop after the event of the thrombosis. It also enables refinement of the actions to be taken especially regarding long-term use of anticoagulants.

Which pelvic ring fractures are potentially lethal?

PURPOSE: Global mortality of polytraumatised patients presenting pelvic ring fractures remains high (330%), despite improvements in treatment algorithms in Level I Trauma Centers. Many classifications have been developed in order to identify and analyse these pelvic ring lesions. However, it remains difficult to predict intra-pelvic haemorrhage. The aim of this study was to identify pelvic ring anatomical lesions associated with significant blood loss, susceptible to lead to life-threatening haemorrhage. MATERIAL AND METHOD: This study focused on a retrospective analysis of patients' medical files, all of whom were admitted to one of the shock rooms of Grenoble University Hospital, France, between January 2004 and December 2008. Treatment was given according to the institutional algorithm of the Alps Trauma Center and Emergency North Alpine Network Trauma System (TRENAU). Different hemodynamical parameters at arrival were measured, and the fractures were classified according to Young and Burgess, Tile, Letournel and Denis. One hundred and ninety seven patients were analysed. They were subdivided into two groups, embolised (Group E) and non-embolised (Group NE). RESULTS: Group NE included 171 patients with a mean age of 40.2 ± 8.7 years (15-90). Group E included 26 patients with a mean age of 41.6 ± 5.3 years (18-67). Twenty-six patients died during the initial treatment phase. Eleven belonged to Group E and 15 to Group NE. Mortality was significantly higher in Group E (42.3% vs 8.8% in Group NE) (p < 0.05). There were significantly many more Tile C unstable fractures in Group E (p = 0.0014), and anterior lesions, according to Letournel, with pubic symphysis disruption were significantly more likely to lead to active bleeding treated by selective embolisation (p = 0.0014). Posterior pelvic ring lesions with iliac wing fracture and transforaminal sacral fractures (Denis 2) were also more frequently associated with bleeding treated by embolisation (p = 0.0088 and p = 0.0369 respectively). DISCUSSION/CONCLUSION: It appears that in our series the primary identification and classification of osteo-ligamentous lesions (according to Letournel and Denis' classifications) allows to anticipate the importance of bleeding and to adapt the management of patients accordingly, in order to quickly organise angiography with embolisation.

Polytraumatism and solid organ bleeding syndrome: The role of imaging.

In multiple injuries, features of bleeding from solid organs mostly involve the liver, spleen and kidneys and may be treated by embolization. The indications and techniques for embolization vary between organs and depend on the pathophysiology of the injuries, type of vascularization (anastomotic or terminal) and type of embolization (curative or preventative). Interventional radiologists should have a full understanding of these indications and techniques and management algorithms should be produced within each facility in order to define the respective place of the different treatment options.

Fibromuscular dysplasia: what the radiologist should know: a pictorial review.

UNLABELLED: Fibromuscular dysplasia (FMD) is an idiopathic, segmentary, non-inflammatory and non-atherosclerotic disease that can affect all layers of both small- and medium-calibre arteries. The prevalence of FMD is estimated between 4 and 6 % in the renal arteries and between 0.3 and 3 % in the cervico-encephalic arteries. FMD most frequently affects the renal, carotid and vertebral arteries, but it can theoretically affect any artery. Radiologists play an important role in the diagnosis of FMD, and good knowledge of FMD's signs will certainly help reduce the delay between the first symptoms and diagnosis. The common string-of-beads aspect is well known, but less common presentations also have to be considered. These less common imaging findings include vascular loops, fusiform vascular ectasia, arterial dissection, aneurysm and subarachnoid haemorrhage. These radiologic presentations should be known by radiologists in order to diagnose possible FMD, particularly when present in young females or when associated with personal or familial hypertension, to reduce the delay between the onset of the first symptom and the final diagnosis. The patients have to be referred to specialised FMD centres for dedicated management. TEACHING POINTS: • Fibromuscular dysplasia is not a rare disease. • Radiologists should recognise less common presentations to orient specific management. • Vascular loops, fusiform vascular ectasia and a "string-of-beads" aspect are typical presentations. • Arterial dissection, aneurysm and subarachnoid haemorrhage are less typical radiologic presentations.

Stenting of a renal artery compressed by the diaphragm.

A 74-year-old man had a resistant hypertension with an increase in plasma aldosterone and active plasma renin levels, and an irregular appearance of the left kidney outline by ultrasound. The CT scan showed a stenosis of the left renal artery, which was pushed against the aorta by the left crus of the diaphragm. An angioplasty with placement of an autoexpansible stent was carried out with a good result on the arterial pressure level. After 3 years, the patient was re-hospitalised with severe hypertension. The CT scan demonstrated a compression of the stent by the left crus of the diaphragm, with good permeability of the artery downstream from the stent, and radiographic examination showed a fracture of the left renal artery stent. Thus, a reimplantation of the left renal artery in the aorta was carried out. Stenosis of the renal artery by fibres from a crus of the diaphragm is a rare cause of renovascular hypertension. Helicoidal angioscanner imaging is particularly useful to do the diagnosis. In the present case, renal angioplasty with stenting was complicated by a fracture of the stent that led to the surgery. Thus, when renal artery stenosis by a crus of the diaphragm is diagnosed, surgical treatment needs to be considered on a case-by-case basis in relation to the anatomy and the biological and functional data.

Exposed prosthesis of a complex reconstruction of the ascending aorta and aortic arch in a sternal wound infection: Successful treatment by a pectoral muscle flap.

A local wound infection developed in a 42-year-old female patient after replacement of ascending aorta, aortic arch and supra-aortic vessels, following aortic dissection. Because of the high risk of infection due to the vascular prosthesis and its location at the upper part of the sternum, a right pectoral muscular flap, detached from the humerus and vascularized by medial perforators originating from the internal mammary artery, was isolated. The postoperative course was uneventful and the patient remains well 16 months after the operation.

[Pulmonary embolism and anaphylactic shock caused by rupture of a hepatic hydatid cyst]. / Embolie pulmonaire et choc anaphylactique par rupture d'un kyste hydatique hépatique.

A 44 year old man was admitted to hospital as an emergency for shock associated with giant urticaria and atrial fibrillation. Angiography showed pulmonary embolism, and an image suggesting a hydatid cyst of the liver was observed by echocardiography in the sub-costal view, confirmed by liver ultrasonic scan and serology. After treatment with Albendazole, the cyst was removed surgically and histology showed the characteristic appearances of hydatid disease. The final diagnosis was rupture of a hydatid cyst into a sub-hepatic vein with anaphylactic shock and pulmonary embolism.

[Compression of the renal artery by a musculo-tendinous band: an unrecognised cause of renovascular hypertension]. / Compression d'une artère rénale par une bande musculo-tendineuse. Une cause méconnue d'hypertension rénovasculaire.

Stenosis of a renal artery by extrinsic compression is an uncommon cause of renovascular hypertension. In rare cases, this compression is due to the presence of fibres from the diaphragm or the psoas muscle. This aetiology should be considered when renal artery stenosis is observed in a young hypertensive patient without cardiovascular risk factors. Spiral CT scan is particularly useful for studying the relationship between the diaphragm and arterial structures. Once the diagnosis has been made, the treatment is surgical section of the fibrous tissues responsible for the compression.

[Ostial stenosis of the renal arteries: results of surgery]. / Sténose ostiale des artères rénales: résultats de la chirurgie.

Surgery and percutaneous balloon are two contrasting methods for the treatment of renal artery stenosis. Surgical revascularizations offer excellent long term results with a 70% to 90% five year patency rate wherever the location of the lesion on the renal artery. Long term results of transluminal angioplasty are strongly correlated with the anatomo-radiological features of the lesions. From their own experience and after a literature review, the authors conclude that: For lesions located on the trunks of the renal artery, results of surgery and transluminal angioplasty are equivalent. For lesions involving the ostium of the renal artery, the failure rate is high and restenosis are frequent with angioplasty. In that case, surgery is a proper choice which offers better immediate and long term results.

[Physiological approach to reading chest radiography. Clinical application]. / Lecture physiologique de la radiographie thoracique. Applications pathologiques.

Interpretation of chest X-ray relies not only on morphological criterion but also on physiological bases. Vascular opacities represent 80% of visible structures in the lung area; the contour of the heart and large vessels are well recognized. In the first part we review the current knowledge about the physiology of the pulmonary circulation and its factors of regulation. In the second part we present the reading principals of a chest X-ray obtained in an erect patient at the end of inspiration. A check list should be verify in every patient: pulmonary flow distribution (ratio apex/basis); size of small vessels in the periphery of both lungs; Simon's line; shape of vessels; ratio of the artery/bronchus diameter; size and shape of the heart; diameters of aorta, right pulmonary artery, and azygos vein. In the last part, we present the main pathological patterns: diffuse increase of pulmonary flow; pulmonary venous hypertension; pulmonary arterial hypertension; localized changes of the pulmonary blood flow in which the role of expiratory X-ray is emphasized. Many pitfalls are identified: egalisation of the ratio apex/basis; enlargement of the vascular pedicle; enlargement of the azygos vein.

[Left ventricular insertion of a permanent pacemaker (radiographic aspect)]. / Insertion ventriculaire gauche d'une sonde de stimulation cardiaque définitive (aspect radiographique)

We report a case of inadvertent transarterial permanent pacing of the left ventricule that was not diagnosed on routine chest radiography or ECG. The malposition was diagnosed because of the rupture of the mitral valve cordage 2 months after pacemaker implantation. We emphasize the radiographic appearance of this rare malposition.