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Biomedical subjects

P Rosset

Publications and source records attributed to P Rosset.

At least 19 recordsLinked to original sources

[Surgery and percutaneous injection of acrylic cement in bone metastases].

The first step for treatment of bone metastases is to confirm the diagnosis, particularly if there is only one localisation, so as to exclude a primary bone tumour. Surgery and percutaneous injection of acrylic cement are both efficient to relieve pain. Their indications and timing have to be discussed in pluridisciplinary staff. Long bones metastases have to be nailed before pathologic fracture. If there is suspicion of hypervascularisation, the lesion has to be embolized before any procedure. Treatment of spinal metastases with neurological impairment is an emergency. Paraplegia may be a consequence within a few hours. They have to be treated in an orthopedic or neurosurgery department with the experience of posterior and anterior approach of the spine. Surveillance may be useful to diagnose these metastases before neurological impairment. Depending from the type of cancer, the chemo- and radiotherapy sensibility, the number of metastases, the condition of the posterior wall of the vertebra and the general condition of the patient, different surgical treatments may be possible going from complete resection of the lesion to percutaneous injection of acrylic cement. Conventional radiotherapy is associated to surgery. Satisfactory results of such treatments justify greater involvement of orthopaedic surgery team in multidisciplinary staff.

Administration, Cutaneous↗

Fatal carbon dioxide embolism as an unreported complication of retroperitoneoscopy.

Retroperitoneoscopy has gained popularity because it offers a safe alternative to the more debilitating open approach and avoids postoperative ileus. However, this type of procedure carries certain disadvantages in terms of intraperitoneal effusions and hemodynamic changes. Major complications are exceptional. We describe the case of a 52-year-old man who died of carbon dioxide embolism during elective totally extraperitoneal (TEP) inguinal hernioplasty for symptomatic left indirect inguinal hernia. With the patient under general anesthesia, the retroperitoneal space was gained through a 1. 5-cm incision made below the umbilicus. During the dissection, the patient collapsed and could not be resuscitated. At autopsy, air bubbles were admixed with blood in the epicardial veins, but no injury to vessels was demonstrated. We conclude that carbon dioxide embolism usually is caused by direct puncture of major vessels during intra-abdominal procedures. However, when this complication occurs during retroperitoneoscopy, it seems related to pressure-forced entry of carbon dioxide into the venous plexus.

Carbon Dioxide↗

[Long-term evolution following shelf procedure for hip dysplasia in adults. Shelf survival analysis in 68 cases and retrospective review of 44 with at least 26 years follow-up].

Using Kaplan-Meier's method, the authors found a survival probability of 50% after 25 years in a group of 68 shelf arthroplasties in adult hips. Forty-four shelf procedures, performed at a mean age of 33 years, had sufficient clinical and radiological data to perform a retrospective study with at least 26 years of follow-up. There were 16 dysplastic non-dislocated hips, 19 subluxated hips and 9 dislocated hips. Fifteen shelves (34%) were still in place in 1996 with a mean follow-up of 31.6 years and 29 (66%) underwent reintervention after a mean interval of 20.4 years. The functional result at the latest follow-up, or just prior to reintervention for the reoperated shelves, was good in 13 cases (30%), fair in 28 and poor in 3. Progressive deterioration following shelf procedures was mainly associated with two factors: preoperative congruency (ratio of the largest to smallest joint line thickness), especially if below 0.7, and preoperative osteoarthritis. Reoperation rate climbed from 30% for grade 1 or 2 osteoarthritis, to 73% for grade 3 and to 88% for grade 4. The mean age at the time of reintervention was 54.5 years. Shelf arthroplasties performed for secondary hip osteoarthritis with joint space narrowing (77% in this series) had a mean survival of 20.5 years. The authors believe that a shelf procedure has its place in the conservative surgical management of painful acetabular dysplasia in the adult, even in the presence of osteoarthritis.

Acetabulum↗

[Duodenal somatostatinomas associated with von Recklinghausen disease].

A case of von Recklinghausen's disease with double somatostatin producing neuroendocrine tumour of the ampulla and duodenum is reported. A search of the world's literature revealed 28 patients with immunohistologically proven duodenal somatostatinoma associated with type I neurofibromatosis. These tumours are seldom associated with a recognizable "somatostatin syndrome", but often present with obstructive jaundice, duodenal obstruction, weight loss or gastrointestinal bleeding. Histologically, psammoma bodies are frequently encountered in the glandular lumina of duodenal somatostatinomas (66%), whereas their presence in other neuroendocrine tumours of the gastrointestinal tract is very rare. Metastatization is rare (27%) and mainly confined to lymph nodes (88%). In the world literature duodenal somatostatinoma is associated with von Recklinghausen's disease in 50%.

Ampulla of Vater↗

[Cardiac metastasis of chondrosarcoma: a case report].

Chondrosarcoma is a primary malignant bone tumour which only exceptionally metastasises to the heart. We report a case of chondrosarcoma with left intracavitary cardiac metastasis discovered following abnormal cardiac auscultation. To our knowledge, only 21 cases have been described in the literature. A lesion of the right atrium is the most frequent event. The major risk of these tumours is their emboligenic properties: pulmonary embolism for metastases of the right heart, systemic embolism for metastases of the left heart. Echocardiography establishes the diagnosis by specifying the site and extent of the tumour. CT scan allows local assessment of the lesions. The course is fatal, although surgery has been able to increase survival of patients with isolated cardiac mestastases.

Aged↗

Endometriosis of the sciatic nerve: case report demonstrating the value of MR imaging.

Among the many causes of sciatica, endometriosis, a rare aetiology, should be considered in menstruating women in view of the diagnostic strategy and ensuing therapeutic implications. We report a case of sciatic nerve involvement with endometriosis in contact with the nerve in the left sciatic notch. Exploration by MRI was invaluable for the diagnosis, revealing a signal on the stem of the nerve suggestive of a lesion with haemorrhagic content.

Adult↗

[Catamenial sciatic pain due to endometriosis of the sciatic nerve. Review of the literature, apropos of a case].

Sciatic nerve endometriosis is rare but must be included in the sciatic pain aetiology diagnosis. Typically the patient's sciatic pain is cyclic. Electromyography and computed tomographic scanning or nuclear resonance imagery contribute to the diagnosis. Different mechanisms of this localization have been proposed. The patient often requires conservative surgery with excision of endometriosis from the nerve. Medical treatment (LH-RH analogues) may be associated in young patients who need to preserve reproductive function. Total hysterectomy with bilateral salpingo-oophorectomy may be mandatory in stage III or IV endometriosis and older patients.

Adult↗

[Intramuscular hematoma simulating a pseudomalignant tumor].

One case of a large post-traumatic cystic haematoma of the thigh presenting with a pseudotumoral aspect, and resulting in a femoral filling defect and a spontaneous fracture 7 years later, is reported by the authors. Relationships between its pathophysiology and its consequences on bone are stressed.

Adult↗

[Experimental study of primary fixation of screw-ring acetabular components. Role of initial screw-cutting].

Three types of screw-ring acetabular components were implanted to determine the characteristics of their holding power and to study the influence of screw-cutting. The acetabular components were screwed into vinyl polychloride foam. Their resistance was measured. The optimal value of the locking screw couple and the value of the couple beyond the one at which the acetabular component loosened were determined. One of acetabular components was screwed in with and also without preliminary screw-cutting. Its resistance to wrenching was measured in both situations. The resistance curve at wrenching was characteristic of each screw-ring acetabular component. The resistance to wrenching was significantly higher (p < 0.01) for a given acetabular component if it was screwed into a largely open block of foam at its bottom. The screw-cutting allowed for a significantly higher resistance to wrenching (p > 0.05). It allowed for the screwing in with the least effort and for a better perception of the tightening. Knowledge of the comportment of screw-ring acetabular components once installed, usage of preliminary screw-cutting and recourse to a dynametric key are the means of improving the installation of screw-ring acetabular components.

Acetabulum↗

[Functional result and outcome of total condylar knee prosthesis].

Total condylar knee prosthesis is gradually proving fully reliable. It is an "all or nothing" type of surgery, with either good or bad results depending on the occurrence of complications, notably tibial decementation. With the experience acquired it may be said that the much dreaded wearing off of polyethylene components is not responsible for failures of total knee prosthesis.

Humans↗

[The combined luxation of the trapezoid and 2nd metacarpal bones. Apropos of a case].

The authors report a case of posterior dislocation of the trapezoid bone together with the second metacarpal. Among the 25 cases of trapezoid dislocations reported in the literature, no similar case has been found. The patient was seen 4 months after the injury and there was also a scaphoid instability. Open reduction and a scapho-trapezio-trapezoid arthrodesis were performed. The diagnosis, the mechanism and the treatment of this very unusual injury are discussed.

Adult↗

[Anticoagulants and psoas hematoma].

Between 1985 and 1989, 16 patients under anticoagulant therapy developed a haematoma in the psoas or iliac muscle, 60% of them with a severe femoral nerve entrapment syndrome. Six patients were operated, all with a femoral nerve paralysis, and 5 of them had a quick and complete recovery. Only one still has some complaints in the femoral nerve territory. Among the 10 patients with a nonoperative approach, none of those with a femoral nerve paralysis was completely cured at 6 months. The surgical treatment is the best way to a quick recovery, provided it is done at an early stage.

Anticoagulants↗

Vertebral hydatidosis and paraplegia.

We report the management of two children and 11 adults with paraplegia secondary to vertebral hydatidosis. Destruction of pedicles, posterior vertebral elements and discs as well as the vertebral bodies was common and all six patients with thoracic disease had involvement of adjacent ribs. The 13 patients had a total of 42 major surgical procedures; two patients died from postoperative complications and four from complications of the disease and paraplegia. All eight patients initially treated by laminectomy or anterior decompression alone relapsed within two years and seven required further surgery. Circumferential decompression and grafting gave the best results, six of nine patients being in remission an average of three years and six months later. The prognosis for such patients is poor; remission is the aim, rather than cure. Anthelminthic drugs may improve the prognosis, but radical surgery is likely to remain the keystone of treatment in the foreseeable future.

Adolescent↗