Between Jan. 1983 and Dec. 1990, 17 Patients with distal anterior cerebral artery(DACA) aneurysms were admitted to our institute and underwent microsurgical neck clipping of their aneurysms. This group comprised 3.7% of the 437 aneurysms managed surgically during this period. There were 11 females and 6 males. The mean age was 48.5 years. Most of DACA aneurysms were located at the genu portion of the anterior cerebral artery. Three cases were at the proximal protion of A2 close to the anterior communicating artery. Two cases were at the dista pericallosal artery and distal callosomarginal artery. Eight patients had additional vascular anomalies documented by angiography such as multiple aneurysms, azygos DACA and duplication of DACA. Direct neck clipping was possible in all cases through the interhemispheric approach or the frontotemporal approach according to the location. For the interhemispheric apporach preoperative evaluation of the exact location and direction of the aneurysms on the angiogram was important for operative planning. The surgical outcome was good or excellent without any neurological deficits in 17 of the cases. Operative management, clinical features and incidence of vascular anomalies associated with DACA aneurysms are discussed.
Aneurysm ; Angiography ; Anterior Cerebral Artery* ; Arteries ; Female ; Humans ; Incidence ; Intracranial Aneurysm* ; Male ; Neck

The cells of glomerular mesangium is composed mostly of intrinsic contractile mesangial cells and a few macrophages. Injury to the mesangium is central to many glomerular diseases. This study was aimed to evaluate and compare the expressions of alpha-smooth muscle actin (ASMA) and lysozyme in the mesangium of various human glomerular diseases and also of according to the severity of their progressions. We performed immunohistochemical and transmission electromicroscopic examinations in 51 cases of renal biopsy including 5 normal kidneys. The results were as follows; (1) ASMA staining was negligible in normal glomeruli. (2) Increased ASMA staining was observed in the mesangium of glomeruli from all specimens of primary glomerular disease, regardless of their diagnosis. (3) The staining intensity of ASMA in mesangium was mild in minimal change disease and membranous glomerulonephritis, and strong in focal segmental glomerulosclerosis (FSGS), diffuse mesangial hypercellularity, membranoproliferative glomerulonephritis (MPGN), and IgA nephropathy (IgAN). (4) The staining intensity of ASMA have no correlation with mesangial immune deposits. (5) The staining intensity of ASMA in mesangium was inversely correlated with the disease progression in FSGS and IgAN. (6) Glomeruli showing global or segmental sclerosis invariably lacked ASMA. (7) Compared with ASMA, the mesangial cells with lysozyme expression were very rare, even though it was in proportion to ASMA staining. Interstitial ASMA expression was confined to fibrotic area in various glomerular diseases. In conclusion, the expression of ASMA and lysozyme in mesangium are increased in a variety of glomerular diseases, regardless of disease entity. Their intensity was in proportion to the mesangial cell proliferation. In progressive glomerulonephritis, such as IgAN and FSGS, the increased expression of ASMA was prominent in the early lesion, and decreased with the progression of the glomerular sclerosis.
Actin Cytoskeleton ; Actins* ; Biopsy ; Diagnosis ; Disease Progression ; Glomerular Mesangium ; Glomerulonephritis ; Glomerulonephritis, IGA ; Glomerulonephritis, Membranoproliferative ; Glomerulonephritis, Membranous ; Glomerulosclerosis, Focal Segmental ; Humans ; Kidney ; Macrophages ; Mesangial Cells ; Muramidase* ; Muscle, Smooth* ; Nephrosis, Lipoid ; Sclerosis

No abstract available.
Basilar Artery* ; Rabbits* ; Vasoconstrictor Agents* ; Vasodilator Agents*

No abstract available.

Gastrointestinal stromal tumor (GIST) is known as considerable controversal tumor about it's histogenesis, differentiation and biologic behavior. It is traditionally regarded as smooth muscle tumor. To evaluate and clarify the origin of tumor, we performed immunohistochemical study of 23 cases of GIST on CD34 antigen, alpha-smooth muscle actin, S-100 protein, and compared the result with 4 cases of typical leiomyoma of GI tract. The results were as follows. CD34 antigen expression was noted in 21 cases (91.3%) of GIST, while typical leiomyoma was all negative. There were no difference of CD34 expression according to the biologic behavior. However, it's staining pattern was significantly different (p<0.05). Focal or multifocal expression was dominant in benign GIST (58.3%), while diffuse expression was dominant in malignant GIST (80%). Actin was expressed in 5 cases of benign GIST (38.5%) and 1 of malignant GIST (16.7%) focally. All typical leiomyoma showed diffuse strong positivity on alpha-smooth muscle actin. S-100 protein was expressed in 2 cases of benign GIST (16.7%) only. The pattern of CD34 expression was focal in the actin or S-100 protein positive cases. In conclusion CD34 antigen is useful marker in the separation of GIST, from typical smooth muscle tumor. Also it suggest that most GISTs are histogenetically primitive mesenchymal cell origin. However, CD34 expression was unrelated with biologic behavior of GIST.
Actins ; Antigens, CD34* ; Gastrointestinal Stromal Tumors* ; Gastrointestinal Tract ; Leiomyoma ; S100 Proteins ; Smooth Muscle Tumor

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

In spite of technical advances in neuroradiology, neuroanesthesiology, and microneurosurgery, the treatment of giant aneurysms remains problematic. Between 1983 and 1995, the authors encountered 42 consecutive cases of giant aneurysms, and this study focuses on their clinical manifestations, management, and outcome. The patients' ages ranged from 5 to 73 years, with peak incidence in the sixth decade ; the male to female ratio was 12 : 30. The follow-up period was from 2 to 110(mean, 36) months. The most common presenting symptom was a mass effect found in 22 patients(52%), followed by subarachnoid hemorrhage in 16(38%). Thirty patients underwent a surgical or interventional radiological procedure, comprising direct neck clipping(n=13), proximal clipping(n=7), detachable balloon occlusion(n=4), wrapping(n=3), trapping(n=1), and partial clipping with thrombectomy(n=2). The mortality rate was 16.7% and the morbidity rate, 40% ; the most common postoperative complication was distal cerebral infarction. At the last follow-up, 22 patients(73%) were able to perform daily activities without assistance. In this clinical study, the authors reviewed general aspects of the treatment of giant aneurysms. In conclusion, treatment of giant aneurysms should-for best results-be tailored to patients' individual requirements, determined after thorough examination. Despite advanced neurosurgical techniques, morbidity and mortality rates remain high.
Aneurysm* ; Cerebral Infarction ; Female ; Follow-Up Studies ; Humans ; Incidence ; Male ; Mortality ; Neck ; Postoperative Complications ; Subarachnoid Hemorrhage

Fifty-one consecutive 186 patients with aneurysmal subarachnoid hemorrhage were treated from the day of admission with nimodipine which was given first as an IV infusion at 30ug/kg/hr for 1 week and then orally in a dose of 360mg/day for 2 weeks and compared with 135 patients which were treated without nimodipine for the past 2 years. A comparision based on clinical and radiological variables influencing both the coruse and the outcome of the disease showed no significant difference between the nimodipine treated group and the control group except the delayed timing of surgery in the control group. There was no significant difference in the outcome between the nimodipine treated patients and the patients treated without nimodipine, however in Hung & Hess grade IV patients nimodipine treatment was associated with a significantly better outcome. Nimodipine treatment reduced the occurrence of delayed ischemic deficts(DID) in grade III, IV patients. Significant improvement in the outcome occurred in the nimodipine treated patients with subarachnoid hemorrhage of large amount(Fisher classification III).
Aneurysm* ; Classification ; Humans ; Intracranial Aneurysm ; Nimodipine* ; Subarachnoid Hemorrhage*

Transitional cell carcinoma of the urinary bladder is the most common cancer of the urinary tract and is characterized by frequent recurrence. Like the other malignant tumor, the genetic alterations leading to neoplastic transformation of the urothelium are related with the activation of oncogenes and loss of functional tumor suppressor genes. Cyclin D1 is a putative protooncogene as cell cycle regulator essential for G1 phase progression and is frequently overexpressed in several human tumor. In this study we performed immunohistochemical stainings of cyclin D1 and p53 in both primary and recurrent transitional cell carcinomas of urinary bladder from 56 patients including 20 cases of recurrent tumor, and compared their results with histopathologic features. The results were as follows. Cyclin D1 immunoreactivity was found in 10 of 10 cases (100%) of grade 1, 25 of 41 (61%) cases of grade 2, and 11 of 25 (44%) cases of grade 3 transitional cell carcinomas. p53 immunoreactivity was found in 40% of grade 1, 63% of grade 2, and 87% of grade 3 lesions. Cyclin D1 expression was significantly higher in Ta and T1 lesions than T2 to T4 by pathologic tumor stage. Conversely p53 immunoreactivity was increased in proportion to the T classification. Cyclin D1 was de creased in recurrent transitional cell carcinomas, compared with primary transitional cell carcinomas. However, there was no statistical significance. In conclusion, cyclin D1 immunoreactivity is associated with low histologic grade and low tumor stage. And there is inverse relationship between the cyclin D1 and p53 overexpression.
Carcinoma, Transitional Cell* ; Cell Cycle ; Classification ; Cyclin D1* ; Cyclins* ; G1 Phase ; Genes, Tumor Suppressor ; Humans ; Oncogenes ; Recurrence ; Urinary Bladder* ; Urologic Neoplasms ; Urothelium

To evaluate the clinical and histopathological significance of electron dense deposits on capillary in IgA nephropathy, we reviewed and compared the clinical, laboratory, and pathological features of the patients with IgA nephropathy without loop extension of electron dense deposits(Group I, 91 cases) and IgA nephropathy with loop extension(Group II, 17cases) by ultrastructural examination using transmission electron microscope. IgA nephropathy associated with liver disease, Henoch-Schonlein purpura, systemic lupus erythematosus and the other IgA nephropathies associated with systemic diseases were excluded. The results were as follows; 1) There was no significant difference in age distribution. 2) Generalized edema was more common in group II. 3) Nephrotic ranged proteinuria(>3 g/24hr urine) was more prominent in Group II(52.9%) than Group I(8.8%). 4) Among the groups, segmental or mild deposits on the loops were noted in 13 cases, and severe and generalized deposits in 4 cases. Subendothelial deposits were noted in 6 cases, subepithelial deposits in 3 cases, subendothelial with intramembranous deposits in 1 case, subendothelial with subepithelial deposits in 1 case, intramembranous with subepithelial deposits in 2 cases, and subendothelial, subepithelial and intramembranous deposits in 4 cases. 5) The other associated ultrastructural changes of group II were diffuse effacement of foot processes with microvillous transformation, swelling or vacuolar degeneration of podocytes and glomerular endothelium. 6) According to the WHO morphologic criteria, the grade of Group II was significantly higher than Group I. From the above results, it can be concluded that the extension of electron dense deposits along the capillary loops in the cases of IgA nephropathy is highly correlated with proteinuria in the nephrotic ranged. It seems to be a poor prognostic indicator in view of the facts that it correlats with high histopathologic grading.