Search PubMed⌕ Search

Biomedical subjects

J Beltran

Publications and source records attributed to J Beltran.

At least 109 records · Page 6Linked to original sources
PubMed1986

Ankle: surface coil MR imaging at 1.5 T.

High-field surface coil magnetic resonance (MR) images were obtained of 12 ankles: two from healthy volunteers, seven from patients, and three from fresh cadavers. The cadaver ankles were sectioned in the coronal, sagittal, and axial planes for direct comparison with the MR images. Plain film confirmation of pathologic conditions was obtained in all patients, and five underwent arthroscopy or surgery, or both. MR imaging provided excellent delineation of ligaments and cartilaginous structures in all cases.

Ankle↗
PubMed1985

Direct sagittal CT of the temporomandibular joint.

An apparatus for direct sagittal computed tomography (CT) of the temporomandibular joint is described. Direct sagittal CT allows visualization of the meniscus and of osseous changes of the mandibular condyle without the technical problems and limitations associated with sagittal reformations from axial scans. The device can be constructed easily and economically and adapted to most CT installations.

Humans↗
PubMed1979

The wide spectrum of the asphyxiating thoracic dysplasia.

Seven cases of A. T. D. are presented. Radiological findings were extraordinarily diverse. The prognosis of the disease is difficult for each individual case, because of the frequent pulmonary complications and cystic renal lesions are not always directly related to the severity of the bone changes. The authors believe that the term "thoracic-pelvic-phalangeal dysplasia" proposed by Langer, is the most adequate, since it points to the key factors in the diagnosis of the disease.

Asphyxia↗
PubMed1977

Therapeutic and collateral effects of 25-hydroxycholecalciferol in vitamin D deficiency.

The clinical and biochemical response to 25-hydroxycholecalciferol (25-HCC) and vitamin D3, 150 microgram/day for 20 days has been compared in infants aged 3--18 months with nutritional rickets. The infants were allocated at random to Group I (11 infants) treated with 25HCC and Group II (9 infants) treated with vitamin D3. In addition 15 matched control children without rickets were allocated to Group III and received 25-HCC 75 microgram/day for 20 days. Preliminary studies showed that plasma calcium, phosphorus, alkaline phosphatase and urine pH all differed significantly between the rachitic and control groups. The biochemical parameters in both groups of rachitic children became normal after treatment with the exception of plasma alkaline phosphatase which remained elevated. The control group showed a significant increase in plasma and urine calcium values in spite of the low dose of 25-HCC. The findings suggest that 25-HCC is as effective as vitamin D3 in the treatment of rickets but did not demonstrate any therapeutic advantage.

Alkaline Phosphatase↗
PubMed1977

The Weissenbacter-Zweymuller syndrome. A case report with review of the world literatue.

This report describes a patient with a form of chondrodysplasia characterised by a rhizomelic shorteining of the limbs, metaphyseal widening, vertebral coronal clefts and retrognathia. This syndrome was first described by Weissenbacher and Zweymuller in 1964. All the relevant literature available has been reviewed and it has been concluded there are mild and severe forms of this syndrome.

Bone Diseases, Developmental↗
PubMedDate not supplied

Peroneus brevis tendon in normal subjects: MR morphology and its relationship to longitudinal tears.

PURPOSE: The most prevalent, yet unproven, theory for the development of longitudinal splits of the peroneus brevis tendon is the compression of the peroneus brevis tendon by the peroneus longus tendon in dorsiflexion. The goal of our study was to provide insight into this pathomechanism by evaluating the shape of the peroneus brevis tendon and its relationship to the adjacent structures in the fibular groove during plantarflexion and dorsiflexion. METHOD: The MR images of 13 ankles in asymptomatic adult volunteers were performed in full dorsiflexion and plantarflexion. The axial MR images were assessed for the shape of the peroneus brevis tendon and its relationship to the peroneus longus tendon and posterior cortex of the fibula in both plantarflexion and dorsiflexion. RESULTS: In 12 of the 13 volunteers, the peroneus brevis tendon was located anterior or anteromedial to the peroneus longus tendon in the fibular groove. In those volunteers the peroneus brevis tendon was more flattened and compressed against the fibular groove by the overlying peroneus longus tendon in dorsiflexion than plantarflexion. Fat planes were noted in plantarflexion between the peroneal tendons as well as between the peroneus brevis tendon and the fibular groove. These were obliterated in dorsiflexion. CONCLUSION: The changes in configuration of the tendon of the peroneus brevis tendon in dorsiflexion compared with plantarflexion provide support to our present understanding of the pathomechanism of longitudinal tears of the peroneus brevis tendon.

Adult↗
PubMedDate not supplied

Glenohumeral instability: evaluation with MR arthrography.

Magnetic resonance arthrography is superior to other imaging techniques in evaluation of the glenohumeral joint. Normal variants that can be diagnostic pitfalls include the anterosuperior sublabral foramen, the Buford complex, and hyaline cartilage under the labrum. Anteroinferior dislocation is the most frequent cause of anterior glenohumeral instability and produces a constellation of lesions (anteroinferior labral tear, classic and osseous Bankart lesions, Hill-Sachs lesion). Variants of anteroinferior labral tears include anterior labroligamentous periosteal sleeve avulsion and glenoid labral articular disruption. Anterior glenohumeral instability can also involve tears of the anterior or anterosuperior labrum or the glenohumeral ligaments. Posterior glenohumeral instability can involve a posterior labral tear, posterior capsular stripping or laxity; fracture, erosion, or sclerosis and ectopic ossification of the posterior glenoid fossa; reverse Hill-Sachs lesion; McLaughlin fracture; or posterosuperior glenoid impingement. Superior labral anterior and posterior lesions involve the superior labrum with varying degrees of biceps tendon involvement.

Humans↗
PubMedDate not supplied

MR arthrography of the shoulder: variants and pitfalls.

Use of magnetic resonance arthrography to evaluate pathologic conditions of the shoulder is becoming widespread. However, normal anatomy or anatomic variations can cause interpretive errors. The most common variations occur at the origins of the glenohumeral ligaments (GHLs) and the insertion of the joint capsule. Among the GHL variants, common origin of the superior and middle ligaments is the most frequent followed by thinning, thickening, or absence of a ligament, most often the middle one. Absence or thinning of one ligament is sometimes associated with thickening of another or changes in the size and shape of the anterior capsular recesses. Common normal variants of the labrum include foramen sublabrum (detachment of the anterosuperior labrum from the glenoid margin) and the Buford complex (absence of the anterosuperior labrum in association with a thick middle GHL). Pitfalls related to the arthrographic technique include (a) visualization of a deep sulcus between the insertion of the long head of the biceps tendon and the superior labrum and (b) an apparent type III capsular insertion due to overdistention of the capsule by injected contrast material.

Arthrography↗