[Value of CT bursography in the evaluation of rotator cuff tears]. / Intérêt du burso-scanner dans les lésions de la coiffe des rotateurs.

PURPOSE: To describe the technique and assess the value of subacromial CT bursography in patients with partial surface tear of the rotator cuff tendon. MATERIALS AND METHODS: 15 patients with shoulder pain suggestive of tendinopathy or tear of the rotator cuff were evaluated with subacromial CT bursography. RESULTS: Subacromial CT bursography was normal in 4 patients. Partial surface tear was detected in 7 patients [irregularities (n=2), defect (n=2), superficial tear (n=3)]. Full thickness tear was detected in 4 patients. CONCLUSION: The authors described the technique for subacromial CT bursography to visualize partial surface tears of the rotator cuff tendon. This simple and reliable technique could be an alternative to MR imaging, especially when MR evaluation is not possible.

Assessment of osteosarcoma response to neoadjuvant chemotherapy: comparative usefulness of dynamic gadolinium-enhanced spin-echo magnetic resonance imaging and technetium-99m skeletal angioscintigraphy.

The aim of this work was to study and compare the usefulness of dynamic contrast-enhanced spin-echo MR imaging with high temporal resolution hydroxymethylene diphosphonate technetium-99 m skeletal angioscintigraphy in predicting the osteosarcoma histological response to neoadjuvant chemotherapy. Twelve patients with resectable osteosarcoma were prospectively monitored with dynamic MR imaging and skeletal scintigraphy before start of neoadjuvant chemotherapy, after two cycles of therapy and before surgery. Neoplasm signal intensity and activity intensity were plotted against time, and slopes were calculated for percentage increase over baseline values in the first minute. Stability and increase in slope values during or after chemotherapy were defined as a "radiological non-response". Changes in slopes were compared with the "histological response" (Huvos grading). At midpoint of the chemotherapy, these two imaging modalities failed in predicting final histological response. After the completion of the chemotherapy, these imaging modalities allowed the prediction of histological response with the same accuracy (91 %). In this series, dynamic MR imaging and technetium skeletal scintigraphy provide similar results regarding the prediction of final histological response during neoadjuvant chemotherapy; these results cannot be used to modify the therapeutic protocol at midpoint of chemotherapy; these imaging tools predict accurately the histological response at the end of chemotherapy. These latter results may permit anticipation of the adjuvant chemotherapy strategy during decalcification procedures in resected osteosarcoma and thus to monitor chemotherapy in non-surgical osteosarcoma.

Evaluation of the 'Lequesne's false profile' of the hip in patients with hip osteoarthritis.

OBJECTIVES: To compare the value of Lequesne's false profile (LFP) radiograph of the hip and antero-posterior (AP) X-ray of the pelvis in the assessment of joint space narrowing (JSN) and osteophyte (Ost) in patients with hip osteoarthritis (OA). METHODS: AP and LFP radiographs of the hip were performed using a standardized method in 50 consecutive patients with hip OA. JSN and Ost were graded at different days by a single observer blinded for patients identity, using a six point scale (JSN:0-5) and a four point scale (Ost:0-3) from AP and LFP respectively. Scores obtained from AP and LFP were compared. RESULTS: Mean JSN grade was significantly higher for LFP (2. 7+/-1.0) than AP (2.4+/-1.2) (P=0.001). It was identical for AP and LFP in 28 patients (56%) while the highest grade was found on LFP in 16 (32%) and on AP in 6 (12%). No significant difference between LFP and AP was found for osteophyte grading. CONCLUSION: These data suggest that the combination AP+LFP provide more information than AP alone for the evaluation of joint space narrowing in about one third of patients. LFP may be helpful for the radiographic assessment of OA changes particularly in structure modifying drugs evaluation.

Quantitative evaluation of joint space width in femorotibial osteoarthritis: comparison of three radiographic views.

OBJECTIVE: Quantitative evaluation of radiographic methods proposed to improve the detection of joint space narrowing (JSN) in femorotibial osteoarthritis (OA). METHODS: Thirty-two consecutive patients with knee OA and five normal controls had three different weight-bearing radiographs of the knee: (1) anteroposterior film of both knees in full extension (extended knees), (2) anteroposterior film of one knee in extension while the patient was standing on the homolateral foot (standing on homolateral foot), (3) posteroanterior film of both knees flexed at 30 degrees (schuss view). Joint space was analyzed blind using both an evaluation of JSN with a six-grade scale (JSN score) and an image analyser computer measurement of the mean joint space width (mean JSW). The medial compartment of medial femorotibial OA knees, the lateral compartment of lateral femorotibial OA knees, as well as both compartments of control knees, were measured. Extended knee and schuss views were made 1 year later in 10 patients for the evaluation of sensitivity to change. RESULTS: The JSN scores +/- S.D. in schuss, standing on the homolateral foot and extended knee views were 2.75 +/- 1.31, 1.95 +/- 1.3 and 1.66 +/- 1.27, respectively. The mean JSW +/- S.D. in schuss, standing on the homolateral foot, and extended knee views were 2.9 +/- 1.9 mm, 3.5 +/- 1.6 mm and 3.8 +/- 1.5 mm, respectively. Changes in JSN scores and mean JSW with schuss view increased with OA severity. In controls, JSW of the medial compartment did not vary in the three views. JSW of the lateral compartment of controls was significantly larger in the schuss view. The change in JSW after 1 year was -0.41 mm (P = 0.02) in the schuss view and -0.17 mm (P > 0.05) in the extended knee view. CONCLUSION: The schuss view is suggested as the most accurate method for the evaluation of JSW in femorotibial OA.

[Chronic external instability of the ankle. Contribution of dynamic radiographies, x-ray computed tomography and x-ray computed tomographic arthrography]. / Instabilité chronique externe de la cheville. Apport des radiographies dynamiques, de la tomodensitométrie et de l'arthro-tomodensitométrie.

We retrospectively evaluated the anterior talo fibular ligament and the tarsal sinus of 17 patients who had complained of chronic ankle external instability. This study based on both surgery and CT-arthrography findings shows the pathologic or normal aspects of the talo-fibular anterior ligament (normal, lax, fibrosis residue, ruptured). It confirms the good anatomic analysis of the tarsal sinus, in particular the anterior talo-calcaneal interosseous ligament and the search for fibrosis. We underline that capsular distension due to subtalar laxity is not detected with medical imaging. Compared with surgery (all patients), CT arthrography demonstrated the different aspects of the anterior talo fibular ligament injuries (normal, lax, discontinuous).

Assessment of the bone mineral density in the lumbar vertebrae of newborns by quantitative computed tomography.

OBJECTIVE: To assess the true mineral density (BMD, in g/cm3) of the lumbar spine in newborns. DESIGN AND PATIENTS: A postmortem analysis of five infants with gestational ages ranging from 35 to 40 weeks, and birth weights from 2765 to 3200 g, was conducted using dual-energy quantitative computed tomography (QCT; Siemens Somatom DR). A 2 or 4 mm thick slice was obtained for each lumbar vertebra from L1 to L4. The density measured in these vertebrae was corrected by reference to a solid phantom (Osteo-CT) measured simultaneously. A three-dimensional image of the spine (Elscint CT Twin), as well as a photomicrograph of histological preparation from L2 vertebra, were also obtained in another term baby for comparison with the CT results. RESULTS AND CONCLUSIONS: In the range of values studied, the vertebral densities were not dependent on birth weight. BMD values measured in L2, L3 and L4 were not significantly different, but were 10% lower than in L1 in four of five infants. The spatial resolution of the QCT protocol used (0.4 mm) did not permit the differentiation of trabecular and cortical bone, and the vertebral bodies appeared very homogeneous and dense, with a mean density value of 210 +/- 30 mg Ca/cm3, which is 2.5 times higher than the mean maximum value found in young normal adults. These preliminary results highlight the potential of QCT in neonatology. Special protocols will, however, need to be developed for in vivo measurements in this particular paediatric field.

[Synovial cyst involving isolated paralysis of the infraspinatus muscle. Ultrasonographic diagnosis and MRI]. / Kyste synovial entraînant une paralysie isolée du muscle sous-épineux. Diagnostic échographique et IRM.

A case of entrapment neuropathy of the inferior branch of the suprascapular nerve in the spinoglenoid notch is described. Ultrasonography and MRI examination showed a ganglion cyst in the spinoglenoid notch with an extension to the glenohumeral joint. The lesion was confirmed by surgical and pathological examination.

[Primary amyloidosis of bones. MRI aspects]. / Amylose osseuse primitive. Aspects en IRM.

Primary systemic amyloidosis is a rare cause of vertebralcollapse. We describe a patient who presented multiplecollapsed vertebrae. Magnetic resonance imaging (MRI) demonstrated a diffuse bone marrow abnormality. A diffuse low signal throughout the vertebral bodies on T1 and T2 weighted spin-echo images were observed. A bone biopsy confirmed the suspected diagnosis of vertebral involvementby amyloid. MR imaging can be of interest to evaluate the bone spreading of a known amyloidosis and to help in the diagnosis of amyloidosis in the case of non traumatical vertebral fractures.

[Preliminary and multidisciplinary study of three Coptic mummies of the Testut-Latarjet museum at Lyon]. / Etude pluridisciplinaire et préliminaire de trois momies coptes du Musée Testut-Latarjet de Lyon.

In 1901 Albert Gayet raked up from Antinoe three mummies exhibited to day at the Anatomy Museum of Lyon. The study of the three mummies was made in detail as to their dress, anthropometric and scannographic findings. The clothes were characteristic of coptic civilization. The radiographic date gave a life span of around 40 years. The X-ray imagery shows the remains of cerebral and visceral organs. The sexual criteria are thought to be those of two women and undetermined for the child. Later, several investigations like endoscopic autopsy, tooth microscopy and chromosomic map will be necessary.

[MRI of the rotator cuff: evaluation of a new symptomatologic classification]. / IRM de la coiffe des rotateurs: évaluation d'une nouvelle classification sémiologique.

The different classifications use for the rotator cuff pathology seem to be incomplete. We propose a new classification with many advantages: 1) Differentiate the tendinopathy between less serious (grade 2A) and serious (grade 2B). 2) Recognize the intra-tendinous cleavage of the infra-spinatus associated with complete tear of the supra-spinatus. 3) Differentiate partial and complete tears of the supra-spinatus. We established this classification after a retrospective study of 42 patients operated on for a rotator cuff pathology. Every case had had a preoperative MRI. This classification is simple, reliable, especially for the associated intra tendinous cleavage.

[Results of sutures of the internal meniscus associated with reconstruction of the anterior cruciate ligament in chronic knee joint instability. Apropos of 42 cases, 30 of them controlled by arthrography]. / Résultats des sutures du ménisque interne associées à des reconstructions du ligament croisé antérieur dans les instabilités chroniques du genou. A propos de 42 cas, dont 30 contrôlés par arthrographie.

PURPOSE OF THE STUDY: Most authors agree on the importance of medial meniscus preservation in the case of A.C.L. reconstructive surgery. The purpose of this study was to analyze the anatomical results of sutures of medial meniscus tears by the means of arthrography. MATERIAL: Medial meniscus 42 sutures for peripheral tears at the posterior horn (length between 10 and 50 mm, 70 per cent greater than 20 mm) had been performed through an open procedure using a posterior approach. The average age of the patients was 24 years (17-54) with a clear male predominance (64 per cent). The average age at the time of injury was 22 years, 6 months. METHODS: The patients were operated on by the same surgeon, with the same technique. Resorbable sutures were used spaced every-3 mm, and tightened outside the joint. The A.C.L. was reconstructed by a bone-patellar tendon-bone technique (modified K.G. Jones). A first series of 13-patients were no weight bearing allowed for 6 weeks post-operatively. A second series of 29 patients were allowed immediate partial weight bearing. All the patients were permitted active flexion. All the patients had been examined with a minimum of 6 months follow-up. They were all controlled clinically (results evaluated with the I.K.D.C. score) and with passive dynamic X rays to measure residual laxity. 32 patients had an arthrogram before the operation in the aim to compare with the postoperative arthrogram. 30 patients had an arthrogram after an average of 21 months. 12 patients refused follow-up arthrograms. 9 patients had arthroscopy for pain or effusion. RESULTS: All the patients obtained a range of flexion-between 90 degrees and 110 degrees at 4 weeks. A flexed contracture of 10 degrees was noted in only 1 case. Meniscal functional results were good for 32 cases after a mean follow-up of 4 years and 4 months. Arthrograms in 30 cases showed no residual tear in 19 cases (63 per cent), 3 cases had incomplete healing and 8 cases had failed. The healing was influenced by the size of the tear, its situation near the posterior wall. In the first series (no weight bearing), there were 2 failures for 9 cases and 6 out of 21 in the second series and 3 incomplete healing. There was no correlation between meniscal functional results and functional ligamentous results evaluated with the I.K.D.C. score. 9 patients had an arthroscopy and 7 out of them a meniscectomy (after 17 months 3). CONCLUSIONS: This study confirms the possibility of healing following suture of peripheral medial meniscal tears in the case of ACL reconstructive surgery (even if the tear is long). The use of arthrogram, before the operation and for anatomical control after the operation, ensures complete healing (better than M.R.I. for the suture control). Arthrography is certainly a less invasive technique than arthroscopy.

[Imaging of spinal osteochondroma of neurologic nature. Apropos of 7 cases]. / Imagerie des ostéochondromes rachidiens à expression neurologique. A propos de 7 cas.

In this work, on 7 cases of spinal neurological, the authors analyse the use of imaging in the diagnosis and pretherapeutic approach, as well as for the post-operative follow-up. They insist mostly on the value of tomographic imaging methods, in particular: computed tomography, which allows the study of mineral structures, and determines the site of implant pedicle; magnetic resonance imaging important to precise the connections between tumor and spinal canal contents. They prove that other imaging methods still possess some interest, particularly standard X-ray, useful in estimating the characteristics of exostosis and identifying spinal lesions.

Case report 801: Osteoid osteoma of the coccyx.

In summary, a typical osteoid osteoma in the coccyx in a 13-year-old boy has been presented-a unique location. The clinical, radiological, and pathological aspects of osteoma are summarized. The relationship of osteoid osteoma to osteoblastoma is stressed; it is also stressed that the occurrence of osteoid osteoma in the coccyx is most unusual.

[Measurement of the hip joint space using automatic digital image analysis]. / Mesure de l'interligne coxofémoral par un analyseur automatique d'images numérisées.

Joint surface area (JSA) and mean joint space width (MJSW) at the hip were measured using a ICMS-Techline computer program to analyze digitalised frontal weight-bearing roentgenograms of the pelvis. With this technique, the portion of joint space studied is always the same in a given patient and is enclosed within an acute ECS angle whose apex C is the center of the head of the femur and whose ends E and S are the lateral rim of the acetabulum and the highest point of the homolateral sacral wing respectively. ECS varies across individuals but remains constant in a given hip. Twenty hips were included in the first part of the study. For each hip, three roentgenograms were taken at five-minute intervals by three different radiologists who used their own constants (settings, position of the subject). JSA and MJSW are determined five times on each film by two different observers who had no information on the films under study. The interobserver coefficient of variation (CV) was 4.7% for JSA and 3.3% for MJSW. Intra-observer CVs were 2.97 and 3.54% for MJSW and 4.32% and 5.13% for JSA. There was a very close correlation between MJSW and JSA (r = 0.87, p < 0.0001). MJSW was then determined for roentgenograms of 30 hips with osteoarthritis. Results were compared with the values obtained using Lequesne's method of joint space measurement at the site of maximum narrowing. Measurements were performed in a double-blind fashion by two observers. The correlation coefficient was r = 0.89 (p < 0.0001).(ABSTRACT TRUNCATED AT 250 WORDS)

Haemorrhagic complications of intracerebral cavernomas: value of MRI.

The authors report a retrospective series of 10 cases of intracerebral haematomas consecutive to cavernomas and studied with MRI. The factors that led to the MRI study were the patients' age and clinical history, the site of the haematoma, the persistence of CT images and a negative arteriography. MRI showed that the haematoma was in contact with the cavernoma in 4 cases and at a distance from it in one case. In 5 cases only the cavernoma was seen at the site of the haematoma. Three patients had multiple cavernomas. In all cases, the diagnosis of cavernoma was confirmed at surgical excision.

MRI and CT in a case of pituitary abscess.

We report the case of a woman admitted for hypopituitarism of sudden onset, in whom conventional radiography, CT and MRT suggested a pituitary tumour with supra- and intrasellar extensions. The surgical findings and the clinical course under antibiotic therapy transformed this diagnosis into one of pituitary abscess by a pyogenic micro-organism. Pituitary abscess is an exceptional lesion. Despite the advent of CT and MRI, its preoperative diagnosis remains difficult. However, the presence of an intrasellar expansive process with liquid centre and contrast-enhanced outline should suggest the possibility of an abscess, particularly when the pituitary lesion is associated with a sphenoidal sinus effusion.

[A rare bone abnormality: intra-bone synovial cyst. Apropos of a case]. / Une anomalie osseuse rare: le kyste synovial intra-osseux. A propos d'un cas.

One case of intraosseous ganglion is reported and compared with a review of the literature. The clinical findings, the physiopathological and radiological patterns are discussed as well as the differential diagnosis.