No abstract available.
Neurilemmoma*

STUDY DESIGN: Lumbar disc degeneration and segmental instability of the lumbar spine are causes of low back pain. Disc degeneration causes specific changes of the intervertebral disc, and could affect anatomic variations of end plate and vetebral body. However, the exact relationship between degenerative changes of the intervertebral disc and segmental motion characteristics is not known. It is known that radial tears of the annulus fibrosus initiate or accompany degenerative process of nucleus pulposus and the motion segment. It is hypothesis of this study that the existence of radial tear in the annulus fibrosis affects 3 dimension motion characteristics of motion segment. For the purpose, the degree of intervertebral disc degeneration is newly classified by existence of radial tear. Then, the resulting biomechanical motions are investigated. OBJECTIVES: To investigate effects of disc degeneration by the classification on kinematic motions of the motion segment from human lumbar spine and to suggest a quantified method to determine spinal instability in vivo. MATERIALS AND METHODS: A total of 60 spinal motion segments from human lumbar spine was used for this study. To measure 3 dimensioal motion of the motion segments, Vicon system(Oxford, England) with 3 cameras reflective markers and VAX station was used. 6 kinds of pure moments(flexion, extension, right and left axial rotation, and right and left lateral bending) were applied to the motion segments using dead weight for each loading step. At the end of test(maximum loading), motion segments were frozen for anatomical study. For making clear the degree of the degeneration of the disc, a new classification based on MRI results was used: Grade 1 is a normal young disc without tear; Grade 2 is a normal aging disc without radial tear; Grade 3 is a degenerative disc with radial tear; and Grade 4 is a severely degenerative disc with radial tear and other degeneration such as showing decreased disc height. RESULTS: The upper lumbar specimens with radial tears has increased flexion motions as compared to the normal group. Also, the right and left axial rotation in radial tear group increased as compared to the normal group. However, there were no statistical differences in other motions. For the lower lumbar specimens, there were no significant differences in measured motions in all directions between the normal and radial tear groups CONCLUSIONS: These results suggests that the segmental motions are affected by radial tear in the intervertebral disc. Thus, the radial tear in the annulus fibrosus of lumbar intervertebral disc could cause the instability of lumbar spine. Further research is required to determine the relationship between other structural changes and biomechanical characteristics, and future studies should include in vivo investigations to correlate these findings to patients'symptoms.
Aging ; Classification ; Fibrosis ; Humans ; Intervertebral Disc ; Intervertebral Disc Degeneration ; Low Back Pain ; Magnetic Resonance Imaging ; Spine

No abstract available.
Breast Diseases* ; Breast* ; Estrogens* ; Progesterone* ; Receptors, Estrogen* ; Receptors, Progesterone*

Thoraic outlet syndrome is a collective term in which symptoms and signs are due to bony and soft tissue compression of the neurovascular bundle at the thoracic outlet. It is the purpose of this paper to evaluate the results of treatment of patients with thoracic outlet syndrome by surgical methods. In this study, 7 cases, comprised of cervical rib (3 cases), excessive callus formation after clavicular fracture (2 cases), and scalenus anticus syndrome (2 cases), which had developed thoracic outlet syndrome were treated at Severance Hospital and good results were obtained.
Bony Callus ; Cervical Rib ; Humans ; Thoracic Outlet Syndrome

Histocytic medullary reticulosis, known as malignant histiocytosis, is a disorder characterized by a systemicproliferation of morphologically abnormal histiocytes with prominent erythrophagocytosis. Fever, wasting, lymphdenopathy, hepatosplenomegaly and pancytopenia are the main clinical pictures. Prognosis is very poor andinvariably die within several months. Authors present radiological findings of pulmonary involvement in 5 cases of histologically proven histiocytic medullary reticulosis. The findings are progressive interstitial, alveolar ormixed infiltrations, small amount of pleural effusion, hilar and/or mediastineal lymph node enlargement and cardiomegaly. Histiocytic medullary reticulosis should be borne in mind in differential diagnosis of any patientswho has unexplanable above radiological findings.
Cardiomegaly ; Diagnosis, Differential ; Fever ; Histiocytes ; Histiocytic Sarcoma ; Lung ; Lymph Nodes ; Pancytopenia ; Pleural Effusion ; Prognosis

To assess the pathological basis of the sonographic changes of the gallbladder wall in cholecystitis, thesonographic appearances of the gallbladder wall were analysed in 17 patients with acute cholecystitis and 27patients with chronic cholecystitis, and correlated with pathological specimens removed at surgery. In acutecholecystitis, a thin sonolucent layer within the echogenic gallbladder wall corresponds to subserosal edema,hemorrhage and inflammatory cell infiltration: in chronic cholecystitis it corresponds to subserosal edema,hemorrhage and inflammatory cell infiltration: in chronic cholelcystitis it corresponds to subserosal edema,hemorrhage and inflammatory cell infiltration, in chronic cholelcystitis it corresponds to muscular hypertrophy.Indistinctness and/or a low echogenicity rind along the inner margin reflects mucosal sloughing or obliteration ofthe mucosal folds. Uniformly decreased echogenicity of the wall is caused by severe inflammatory cell infiltrationwith sloughing of the mucosa or obliteration of the mucosal folds. These sonographic singns are considered to bevaluable sings of cholecystitis.
Cholecystitis ; Cholecystitis, Acute ; Gallbladder ; Humans ; Mucous Membrane ; Ultrasonography

No abstract available.

No abstract available.

No abstract available.
Adult* ; Head* ; Humans ; Necrosis*

No abstract available.