No abstract available.
Sarcoma, Ewing

PURPOSE: To analyze contrast-enhancement pattern of stomach cancer on dynamic MRI and to verify the efficacy of intravenous contrast agent in the evaluation of stomach cancer. MATERIALS AND METHODS: Twelve patients with proven stomach cancer underwent dynamic MRI, By using 1.0T scanner, we obtained precontrast FLASH images, and 30, 60, 90 second delay FLASH images after intravenous contrast injection. All patients ingested on liter of water and had intramuscluar injection of Buscopan just before MR study. For quantitative analysis we measured signal to noise ratio (S/N) of stomach cancer on each image, and signal difference to noise ratio (SD/N) between cancer and intraluminal fluid, cancer and the pancreas. For qualitative analysis two radiologists evaluated lesion conspicuity on each image by grading system(grade 0, 1, 2, 3: poor, fair, good, excellent). RESULTS: S/N of stomach cancer increased gradually by time(precontrast, 30, 60, 90 second delay:38.7, 42.5, 57.4, 65.7). SD/N between cancer and intraluminal fluid significantly increased after contrast enhancement(1.24, 25.01, 39.30, 45.89). SD/Ns between cancer and the pancreas were 10.5, 9.33, 9.99, 10.66 respectively. In qualitative analysis, precontrast images were better than postcontrast images for delineation of stomach cancer, Postcontrast images showed clear endo-luminal side of stomach cancer, but outer margin of stomach cancer was more distinct on precontrast images. CONCLUSION: Precontrast MR images are better than postcontrast MR images in the depiction of stomach cancer. Intravenous contrast agent is not imperative in the evaluation of stomach cancer.
Butylscopolammonium Bromide ; Humans ; Magnetic Resonance Imaging* ; Noise ; Pancreas ; Signal-To-Noise Ratio ; Stomach Neoplasms* ; Water

Sialosyl Tn mucin antigen (STn) is a carbohydrate antigen of tumor associated mucin formed by the premature 2~6 sialation of N-acetylgalactosamine. STn has been expressed in several tumor types and showed prognostic significance in colonic carcinoma. The authors evaluated the expression of STn immunohistochemically and correlated its expression with clinicopathologic variables in 100 gastric cancers. In early gastric cancer, STn was expressed in 24 cases out of 50 cases (48%). In advanced gastric cancer, STn was expressed in 48 of 50 (96%). The difference in STn expression between advanced gastric cancer and early gastric cancer was statistically significant. The difference in STn expression between tumors with lymph node metastasis and those without lymph node metastasis, between tubular adenocarcinoma and signet ring cell carcinoma, and between intestinal type and diffuse type adenocarcinoma was statistically insignificant in early or advanced gastric adenocarcinoma. These results suggest that the STn expression plays a role in the tumor progression in both early and advanced gastric adenocarcinomas.
Adenocarcinoma* ; Carcinoma, Signet Ring Cell ; Colon ; Lymph Nodes ; Mucins* ; Neoplasm Metastasis ; Stomach ; Stomach Neoplasms

No abstract available.
Acne Vulgaris* ; Isotretinoin*

No abstract available.
Aneurysm*

No abstract available.
Follow-Up Studies* ; Prostheses and Implants*

No abstract available.
Neck*

OBJECTIVE: To study the incidence and degree of the cervical instability in the cerebral palsied patients and to investigate the cause of the high incidence of cervical myelopathy in these patients. METHOD: The static and dynamic radiography of the cervical spine in the sagittal plane was performed in seventy-two patients with athetoid and spastic cerebral palsy and the incidence of spondylolisthesis, range of motion(by the Penning Method), sagittal diameter of the cervical canal, and posture of the cervical spine were evaluated. RESULTS: The incidence of the cervical spondylolisthesis was fifty percent with athetoid cerebral palsy and twenty-seven percents with spastic cerebral palsy. The incidence of spondylolisthesis was especially high at the level of C3/4 and C4/5. The excessive range of motion in flexion/extension by the sagittal plane was observed in 66.7% of athetoid patients and 53.3% of spastic patients, especially at the C2/3 and C3/4 levels. The abnormal curvature was noted in 66.6% of athetoid and spastic patients. C-curve and S-curve were more common in athetoid patients and straightening of the C-spine was more common in spastic type. A sagittal diameter of the cervical spinal canal was significantly decreased in patients with athetoid patients with C3/4 spondylolisthesis and/or abnormal curvature such as a C-curve or S-curve(P<0.05). Height of the vertebral body was decreased in both athetoid and spastic patients. CONCLUSION: The combination of a cervical instability and a narrow spinal canal predisposes the neurological progression to a cervical myelopathy in cerebral palsied patients.
Adolescent* ; Cerebral Palsy* ; Humans ; Incidence ; Muscle Spasticity ; Posture ; Radiography ; Range of Motion, Articular ; Spinal Canal ; Spinal Cord Diseases ; Spine ; Spondylolisthesis

No abstract available.
Adult* ; Humans ; Precursor Cell Lymphoblastic Leukemia-Lymphoma*

The value of double contrast arthrography in meniscal lesions was studied in 58 patients with clinical findings suggestive of meniscal lesion. In all cases, arthrotomy was performed and meniscal lesions were found in 52 patients. The arthrographic findings were compared to clinical and operative findings and the following results were obtained. 1. The diagnostic accuracy of arthrography in meniscal lesions was 84.5% 2. The diagnostic accuracy of the clinical findings was 69%, but the accuracy was increased to 91.4% with the aid of arthrographic findings. 3. Arthrography would be unnecessary if the clinical findings highly suggest the meniscal lesion. 4. Arthrography is thought to be a useful diagnostic method for meniscal lesions.
Arthrography ; Diagnosis ; Humans ; Knee ; Methods