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C Villas

Publications and source records attributed to C Villas.

At least 37 records · Page 2Linked to original sources
PubMed1984

Aseptic diaphyseal pseudarthrosis: treatment by rigid internal fixation.

The authors define their concepts with regard to nonunion of fractures and study the possible causes of aseptic diaphyseal pseudarthrosis in the 182 cases in their casuistics. They have found that the indication for osteosynthesis was incorrect in 34% of the cases and when it was correct, the technique was poor in 58%. The authors conclude that the risk of nonunion in fractures and nonconsolidation of pseudarthrosis can be minimished if there is: (1) correct indication with respect to type and level of fracture or pseudarthrosis; (2) choice of an appropriate internal fixation method; and (3) good achievement of the selected osteosynthesis.

Femoral Fractures↗
PubMed1984

New plate for lateral translation in valgus intertrochanteric osteotomy (CUN plate).

A new plate is presented for internal fixation of valgus intertrochanteric osteotomy. This plate enables a controlled translation, permits dynamic compression of the osteotomy line and eludes some of the complications involved in the use of other double-angle plates. The morphological characteristics of the plate as well as its technical and surgical aspects are described. A follow-up study of 63 patients operated on between January 1978 and June 1980 has been carried out, underlining some of the mistakes that can affect the healing time.

Femur Head Necrosis↗
PubMed1983

Surgical treatment of metatarsalgia. Long-term evaluation of 105 cases.

The authors present a long-term evaluation of a special treatment of metatarsalgia. The results are based on clinical findings, footprints and radiographs. The postoperative results provide a satisfactory evaluation of our technique and understanding of the biomechanics in the foot.

Adult↗
PubMed1983

[The influence of age on the end-results of the total surgical replacement of the hip].

A revision of the first 700 total hip prostheses (operated on in the period 1969-1980) is carried out with the purpose to establish the influence of the age on the evolution of the arthroplasty. The results are very satisfactory but it is younger patients that complications related to loosening are more frequent. This fact can be explained by a longer period of evolution and a major prosthetic stress in these patients. By this reason, we do not use actually cement to fix the implants in those patients younger than sixty.

Adult↗
PubMed1982

Chronic lateral instability of the ankle.

The authors present 14 cases of chronic lateral instability of the ankle in 13 patients, in whom we performed ligamentoplasty using peroneus lateral brevis. The importance of careful preoperative evaluation of clinical findings as well as stress-roentgenograms and arthrographies is emphasized and a simple surgical technique is presented. We also realize an assessment of the results obtained which are very encouraging at the present.

Adolescent↗
PubMed1981

A comparative ultrastructural study of chondrosarcoma, chordoid sarcoma, and chordoma.

A morphologic and electron microscopic study was made of two chordoid sarcomas. These lesions were compared with two classical chondrosarcomas and two chordomas. These chondrosarcoma cells showed many features common to chondrocytes, such as abundant RER, well-developed Golgi complexes, and microvillous cytoplasmatic membranes. The chordoid sarcomas bore a close morphologic resemblance to the chordomas but the ultrastructural features revealed a close relationship to the chondrosarcomas. The chordoid sarcoma and chondrosarcoma cells had scalloped cytoplasmatic membranes, variable amounts of glycogen, round or oval nuclei and microfibrils, collagen, and electron-dense granules in the ground substance. The chordoma was characterized by the presence of stellate and physalipherous cells, as well as many transitional cells, with varying nuclear morphology; dilated and irregular RER in contact with mitochondria and morphologically varied vacuoles are the main features in the cytoplasm. This study suggests that chordoid sarcoma represents a variety of the chondrosarcoma rather than a form of chordoma. These findings also support the suggestion of Weiss that chordoid sarcoma is an extraskeletal myxoid chondrosarcoma.

Cell Nucleus↗
PubMed1980

Osteotomies in the treatment of gonarthrosis.

The indications to perform an osteotomy of the knee in cases of a degenerative osteoarthritis are reviewed. The pre-, intra- and postoperative management is explained and the results of a hundred valgus osteotomies are evaluated. Our conclusions are based on the numerous indications for an osteotomy and its satisfactory results.

Aged↗
PubMedDate not supplied

Avascular necrosis of the distal fibular epiphysis: a new condition?

A 5-year-old boy was seen because of a right ankle sprain; radiographs showed a marginal anterior avulsion of the distal fibular epiphysis. After plaster immobilization, the patient continued with pain and subjective instability. New radiographs showed a lytic area in the same zone of the avulsion with surrounding sclerosis and a detached bone fragment. Biopsy showed bone necrosis. Two years later, without any traumatic event, the patient began to have a similar pain in the left ankle. Radiographs showed fragmentation of the anterior portion of the distal fibular epiphysis with surrounding sclerosis. Surgical treatment was performed by curettage and cancellous bone grafting; biopsy showed connective tissue, mucoid degeneration, and necrotic bone. After excluding any general disease, we believe that this bone necrosis could be considered an epiphyseal idiopathic avascular necrosis in children.

Ankle Joint↗
PubMedDate not supplied

[Surgical treatment of vertebral metastasis].

Spinal metastases may cause pain and neurologic dysfunction secondary to bone destruction and spinal cord compression. The new oncology therapy have prolonged life expectancy of many patients with different primary tumors. The treatment of metastases is frequently necessary to enhance quality of life. We reviewed 121 patients with spinal metastases of different primary tumors operated between 1982 and 1995. We employed different approach and instrumentation depending on particular case, metastases location and life expectancy. We analysed primary tumor location, spinal pain, neurologic function, pre and post surgical treatment, complications and development. Spinal stabilization and cord decompression gives excellent results for pain relief, neurological improvement and quality of life, always helping to medical treatment of a patient with metastatic disease.

Adolescent↗
PubMedDate not supplied

[Congenital synostoses of the tarsus. Concept, classification, diagnosis and therapeutic approach].

The incidence of congenital tarsal coalition is about 1%. It is recognized as the main etiology of painful, rigid flatfoot in the pediatric population. Talonavicular (50%) and talocalcaneal (40%) coalition are the most common presentation. We must suspect a tarsal coalition in a child with mechanical pain and shoes deformity. Rigid and painful planovalgus deformity are found in physical exam which led to describe in the pass this entity as peroneal spastic flatfoot. Lateral and oblique (35 degrees-45 degrees) radiographs must be practice to observe the coalition. The presence of a beak in the head of the talus or a half moon condensation image as the result of the superposition of the talus over the calcaneus are commonly described. CT-scan is also useful to delineate the size of the coalition and its location. Resection of the bar is the surgical treatment of choice. Excision of the coalition and interposition of fat or a graft must be tried in young patients in order to preserve foot biomechanical properties and to avoid long term problems associated with arthrodesis. Triple arthrodesis or subtalar arthrodesis must be used in older patients with degenerative signs in radiographs or in those cases of multiple coalition or if resection has failed.

Humans↗
PubMedDate not supplied

[Cervical spondylodiscitis].

Eighty patients were treated for spondylodiscitis with the cervical spine involved in nine cases. Conservative treatment was applied in seven cases with Minerva jacket and antibiotics, and surgical treatment was applied in severe, rapidly, progressive, complicated cases and in patients with involvement of nervous system (two cases). The good and satisfactory results in both group were similar. These results show that when the indications are properly established, both conservative and operative methods have satisfactory results.

Adult↗
PubMedDate not supplied

[Cauda equina syndrome due to giant disc herniation].

In cases of acute or progressive development in a few hours of bilateral sciatica, severe foot and occasional quadriceps weakness and/or retention or incontinence of urine with perineal hypalgesia or anesthesia, acute compression of the cauda equina should be suspected, which is usually due to a lumbar disc herniation. Cauda equina syndrome requires emergency spinal surgery. To identify and confirm this syndrome by MR, Ismanoatory. Early surgical decompression must be achieved. Decompression within 24-48 hours significantly improves the neurological and urological outcome. We present the case of a patient who had previously been treated for low back pain who developed a cauda equina syndrome a few days later.

Adrenal Cortex Hormones↗
PubMedDate not supplied

[Radiologic evaluation of idiopathic congenital clubfoot and its clinical correlation in Codivilla's surgical technique].

Thirty-seven patients (52 idiopathic clubfeet) were treated with Codivilla's technique between 1971 and 1985. Radiological measurements and clinical evaluation before and after surgery were performed; a correlation was carried out between these evaluations and personal satisfaction. The results were rated as follows: poor in 4 feet (7.7%), fair in 18 feet (34.6%), good in 24 feet (46.2%) and excellent in 6 feet (11.5%) with a total percentage of satisfactory results amounting to 57.7%. Our conclusion is that when the indications are properly established, Codivilla's technique is a good procedure to correct clubfoot.

Child↗
PubMedDate not supplied

[Histiocytosis X].

We make a clinical and bibliographical review in diagnosis and treatment of Histiocytosis X, who includes three components: Eosinophylic granuloma, Hand-Schüller-Christian disease and Letterer-Siwe syndrome. We had 28 cases, with an average age of 11.8 years. Eighteen (64%) were males and 10 (36%) females. Seventeen were solitary lesions and 8 had multiple skeletal lesions. Three patients had generalized disease: 2 with Hand-Schüller-Christian disease and 1 with Letterer-Siwe syndrome. The femur lesion was frequently observed among the solitary lesions and the cranium involvement in the multiple skeletal lesions. The total number of lesions was 47. The treatment depended on the location, the clinical manifestations and the number of lesions. The patients with solitary lesions (17) were treated with curettage and bone grafting in 6 cases, segmental resection in 3 cases, only curettage in 3, radiotherapy in one and 4 patients didn't receive treatment. The patients with multiple lesions (8), were treated surgically (4 cases), only radiation therapy (2 patients), with surgery and radiotherapy (1) and one patient had no treatment. The generalized disease was treated with surgery of the main lesion depending in the clinical manifestations and chemotherapy and radiotherapy. The prognosis was good in almost all the patients and we observed regression of the disease even without specific treatment. The case of acute generalized disease died due to systemic complications.

Adolescent↗
PubMedDate not supplied

[Congenital malformations of the atlas: classification and clinical significance].

A classification of congenital anomalies of atlas is proposed in order to make a systematic approach to its radiological diagnosis. Atlas is divided in four areas (posterior arch, union of posterior arch and articulation, articulation and anterior arch) for isolated malformations and two more for occipito-atloid and atlo-axoid anomalies. The common anomalies and its possible clinical relevance in each area are described.

Cervical Atlas↗
PubMedDate not supplied

[Epiphyseal osteoid osteoma].

Three more cases of osteoid osteoma located in epiphysis are presented. All of them had special features, as a reactive synovitis due to the proximity of the lesion to the joint and the lower movility arch of these joints. The x-ray was essential for the diagnosis and definitive treatment was surgical resection.

Adult↗
PubMedDate not supplied

[Non-tuberculous infections of the spine].

Non tuberculous spondylodiscitis of the rachis is an uncommon entity that affects boys and male adults with greater frequency. The zone with higher incidence of affection is the lumbar region. Usually the causal germ travels through the hematogenous via from an extrarachidial infectious area. Clinical manifestations begin with an acute segmentary rachialgia and paravertebral muscular contracture while presenting fever. In special cases of little boys or when having radiated pain, the presenting form could be confusing. There is always a vertebral rigidity when performing the physical exam and an increase of the globular sedimentation rate. A septic leukocytal formula is not always present. Between the onset of symptoms and the appearance of radiologic alterations (decrease in the height of the disc, erosion and vertebral destruction, reactive bone neo-formation) there is a variable two to eight weeks latency period. Scintigraphy with Tc99 and Ga67 and CAT scan are very important when facing definite diagnosis. To be able to reach a bacteriological diagnosis, we employ puncture-aspiration of the disc. The isolated germ in most cases is staphylococcus aureus. The most complex differential diagnosis is with tuberculous spondylodiscitis. The evolution is favorable if the treatment is initiated early and if it is adequate (antibiotic therapy and immobilization). If this is not done, recurrences and chronicity of the infection can occur, as well as orthopaedic (Kyphosis) and neurological complications.

Adolescent↗