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Biomedical subjects

P Symeonides

Publications and source records attributed to P Symeonides.

6 recordsLinked to original sources
PubMed1997

Replacement of deficient acetabulum using Burch-Schneider cages. 22 patients followed for 2-10 years.

The absence of good bone stock with massive acetabular deficiency has been a major problem in both revision hip arthroplasty and in primary arthroplasty for congenital dislocation of the hip (CDH). 22 patients (24 hips; 21 revision and 3 primary replacements: mean age 58 years) with substantial bone loss underwent acetabular reinforcement with Burch-Schneider cages. Classification of acetabular deficiency was made according to the AAOS system. The surgical procedure involved preparation of acetabulum, filling the defect with bone autografts, placement of the cage with its flanges, fixation with screws on the lateral wall only and placement of a cement and plastic cup. Radiographic loosening with breakage of the screws was observed in only 1 patient. After a mean follow-up of 8 (2-10) years, good stability was achieved in all patients and no mechanical failure was observed. Satisfactory results were observed in all but one of the cases, indicating that effective support of the acetabulum can be achieved using Burch-Schneider cages.

Acetabulum↗
PubMed1996

Value of ultrasonography, CT and MR imaging in the diagnosis of primary hyperparathyroidism.

PURPOSE: To evaluate the significance of preoperative localization of abnormal parathyroid glands to the surgical outcome in patients with primary hyperparathyroidism. MATERIAL AND METHODS: Thirty-nine patients with primary hyperparathyroidism were studied preoperatively with US (39 patients), CT (30 patients) and MR imaging (18 patients). The overall diagnostic accuracy for US was 87%, CT 66% and MR 94%. In patients with a single parathyroid adenoma US was the most cost-effective localization technique with a detection rate of 96%. CT had a lower detection rate (78%) but was of particular value for fairly large ectopic adenomas in the root of the neck. MR imaging was a good confirmatory test (93%). In patients with multiple gland disease (primary hyperplasia and multiple adenomas), no single localization study alone was sufficient. Combination of all 3 studies, however, alerted the physician to the presence of disease in more than one gland in 87% of these patients. CONCLUSION: US, CT and MR imaging followed by surgery performed by an experienced surgeon provided good clinical results in 39 patients with primary hyperparathyroidism. Preoperative localization was especially useful in patients with primary parathyroid hyperplasia or multiple adenomas and in patients with ectopic parathyroid adenomas in the root of the neck. We recommend identification of all abnormal parathyroid glands prior to surgery.

Adenoma↗
PubMed1983

Osteoid osteoma of the capitate.

Two cases of osteoid osteoma of the capitate bone are described. This lesion is rare in the capitate: only ten cases have been reported. Noctural pain was the most significant clinical feature, with characteristic relief by aspirin. The findings on routine x-rays, although not very typical, were sufficient to establish the diagnosis and to make the use of tomograms, bone scans and angiograms unnecessary. Resection "en bloc" through a dorsal approach led to complete cure.

Adolescent↗