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Biomedical subjects

T Dujardin

Publications and source records attributed to T Dujardin.

6 recordsLinked to original sources
PubMed2000

Maxillary distraction osteogenesis: a method with skeletal anchorage.

Maxillary distraction osteogenesis is a challenging technique to treat severe maxillary retrusion. Maxillary advancement by distraction has the advantage to provide new bone in combination with simultaneous expansion of the soft-tissue functional matrix. Cleft lip and palate patients can present with severe maxillary retrusion and Class III malocclusion. Two 13-year-old patients, born with non-syndromic cleft lip and palate, underwent maxillary distraction--one had a bilateral, the other a unilateral complete cleft lip and palate. Maxillary advancement was performed using an external distraction device in combination with titanium miniplates as a skeletal maxillary anchorage. After a complete Lefort I osteotomy with pterygomaxillary disjunction, a latency period of 3 days was respected. On the fourth postoperative day, distraction was initiated at the rate of 1 mm/d. Preoperative clinical photographs, dental casts, lateral cephalograms, and panoramic radiographs were taken. Further lateral cephalograms were obtained after the latency period, after completion of the active period of distraction, at the completion of the consolidation period, and at 6 and 12 months postoperatively. The aesthetic outcome was excellent and skeletal advancement of 8 and 7 mm was measured without dentoalveolar compensations.

Adolescent↗
PubMed1999

Ulcerated cutaneous epithelioid hemangioendothelioma.

Epithelioid hemangioendothelioma described first by Weiss and Enzinger in 1982 is an uncommon vascular tumor usually involving soft tissue, less frequently the lung and the liver and exceptionally the skin. We herein report a 52-year-old woman who presented an isolated moderately painful persistant ulceration of the concha of her left ear. Histopathological findings showed strands and nests of epithelioid endothelial cells typical of cutaneous epithelioid hemangioendothelioma. Immunohistochemical stainings confirmed the vascular nature of the tumor. Surgical excision by ear amputation was performed. In a review of the literature, to our knowledge, this clinical presentation as ulceration has never previously been reported.

Biopsy, Needle↗
PubMed1992

[Progression after radical prostatectomy of cancer of the prostate: prognostic criteria and the role of PSA in monitoring].

Progression after radical prostatectomy, evaluated by a rise in plasma PSA and/or the appearance of a pelvic nodule positive on biopsy and/or the presence of bone metastases confirmed by bone scan, was studied in a series of patients with prostatic cancer with a follow-up of between 6 months and 5 years. The progression-free survival rate was 86% at 1 year and 60% at 5 years. A progression-free survival rate and the relative risk of progression were established on the basis of the morphological characteristics (anatomical stage, tumour volume, seminal vesicle invasion, condition of the prostatic capsule and lymph nodes, positive resection margins at the apex) and histological features (Gleason's score) of the cancer, allowing determination of the influence of prognostic criteria on the outcome. The positive resection margins at the apex were due to preservation of the nervi erigentes. The preservation of the neurovascular pedicles may not be justified in the case of a tumour confined to the prostatic apex.

Adenocarcinoma↗
PubMed1990

[Exclusive piezoelectric lithotripsy in the treatment of calculi larger than 30 mm (partial or complete coralliform, pyelic calculi)].

Thirty patients with partial or total staghorn stones or calculi larger than 30 mm were treated by piezoelectric lithotripsy (PEL) monotherapy using an EDAP LT-01 lithotripter with ultrasound guidance. Nineteen of these patients had pelvic stones; the other 11 had partial (9) or total (2) staghorn stones. All patients first underwent an initial lithotripsy session. No anesthesia or IV sedation was required in any case. If stone fragmentation was achieved during this first session, a double-J stent was inserted before the second lithotripsy session. Prior to the first session, 18 of 30 patients had sterile urine cultures; 12 of 30 presented major distension of the excretory tract. Results were analyzed to determine the factors influencing the outcome of this therapy. Three months after the first session, patients were considered cured if their stones had completely disappeared according to plain abdominal films (14 of 30, 46%). In seven patients (23.3%) fragmentation had occurred but residual fragments remained (1 to 3 fragments less than or equal to 4 mm). No fragmentation was obtained after the first session in nine patients (30.7%) (1 total staghorn stone, 8 pelvic stones). The mean number of treatment sessions was five (range, 1 to 15). Complications occurred in only 10% of patients (3 of 30): two steinstrassen and one acute pyelonephritis. Eighty-three percent of patients without major excretory tract distension and 55% of patients whose initial urine culture was sterile achieved a stone-free state. Therefore the best indications for PEL monotherapy for calculi larger than 30 mm are pelvic stones and partial staghorn stones and no major excretory tract dilatation in patients with sterile initial urine cultures.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1989

[Endoscopic treatment of complicated ureteroceles in adults. Apropos of 2 cases].

Usually diagnosed in childhood, ureterocele is a congenital malformation which is often revealed in adults because of a complication. Renal colic and dysuria were the clinical symptoms that led to discovery in the two patients reported here. These two women (aged 80 and 32 years) underwent transurethral meatotomy for complicated ureterocele. This procedure was sufficient for cure, with spontaneous evacuation of all stones in patient 2. There were no clinical or bacteriological (urine analyses) signs of reflux during the follow-up period (24 and 12 months). Endoscopic treatment of adult complicated ureterocele can thus be proposed as a first line procedure. Development of symptomatic secondary reflux is an indication for surgery.

Adult↗