No abstract available.
Humans

No abstract available.
Erythema Multiforme* ; Erythema* ; Lymphoma*

No abstract available.

No abstract available.
Hemorrhoidectomy*

The diffuse large B-cell lymphoma category of the Revised European American Classification of Lymphoid Neoplasms (REAL) encompasses different morphologic lymphoma subtypes in a single entity, especially the diffuse large cell (DLC) and the immunoblastic (IBL) subtypes by Working Formulation (WF). The aim of this study is to determine the influence of the morphologic subdivision within this category with respect to clinical outcome and proliferative index using Ki-67 immunostainig combined with image analysis. We retrospectively reviewed 74 patients from 1990 to 1996, who were diagnosed with diffuse large B-cell lymphoma. All cases were reclassified according to REAL and Working Formulation (WF), and Ki-67 immunostaining was performed in all the cases. Fifty-eight cases (78.4%) were classified as DLC and 16 cases (21.6%) as IBL, according to WF. Twenty one cases (28.4%) showed nodal involvement and 53 cases (71.6%), extranodal involvement. All cases were found to display a variable degree of nuclear Ki-67 staining. A proliferative index of 50% or higher identified a group of patients (77%) who had poor clinical results. Overall survival was significantly reduced in these patients displaying high Ki-67 associated proliferative index compared to those with a low proliferative index (p=0.007). 5-year survival estimates were 93% in the low proliferative index group and 55% in the high proliferative index group. A multivariate regression analysis incorporating commonly used clinical prognostic factors confirmed the independent effect of proliferation index on survival. Moreover, all of the 16 IBL cases showed Ki-67 positivity of 50% or higher, which correlates with the poor clinical outcome compared to 70.7% of DLC (p=0.014). We conclude that subdivision of the diffuse large B-cell lymphoma category of the REAL classification is necessary in terms of prognostic significance in correlation with Ki-67 proliferative index.
B-Lymphocytes* ; Classification ; Humans ; Lymphoma ; Lymphoma, B-Cell* ; Lymphoma, Large B-Cell, Diffuse ; Retrospective Studies

BACKGROUND/OBJECTIVES: Colorectal cancer (CRC) is the third most common cancer worldwide with a high recurrence rate. Oxaliplatin (OXA) resistance is one of the major reasons hindering CRC therapy. β-Carotene (BC) is a provitamin A and is known to have antioxidant and anticancer effects. However, the combined effect of OXA and BC has not been investigated. Therefore, this study investigated the anticancer effects and mechanism of the combination of OXA and BC on CRC.MATERIALS/METHODS: In the present study, the effects of the combination of OXA and BC on cell viability, cell cycle arrest, and cancer stemness were investigated using HCT116, HT29, OXA-resistant cells, and human CRC organoids. RESULTS: The combination of OXA and BC enhanced apoptosis, G 2,/sub> /M phase cell cycle arrest, and inhibited cancer cell survival in human CRC resistant cells and CRC organoids without toxicity in normal organoids. Cancer stem cell marker expression and self-replicating capacity were suppressed by combined treatment with OXA and BC. Moreover, this combined treatment upregulated apoptosis and the stem cell-related JAK/STAT signaling pathway. CONCLUSIONS Our results suggest a novel potential role of BC in reducing resistance to OXA, thereby enhances the anticancer effects of OXA. This enhancement is achieved through the regulation of cell cycle, apoptosis, and stemness in CRC.

PURPOSE: The prognosis after potentially curative resection for stage IV gastric cancer, according to the 5th edition of AJCC/UICC classification, is poorly understood. The aim of this study was to evaluate the feasibility of the curative resection in patients with stage IV gastric cancer, which were considered potentially curable cases. METHODS: From November 1991 to June 1996, 91 patients were confirmed as having stage IV gastric cancer at Seoul Boramae Municipal Hospital. Of these 91 patients, 30 who were potentially curative resected including at least D2 type lymph node dissections were reviewed retrospectively. The average numbers of totally dissected and positive lymph nodes were 43.0 (range: 26~74) and 23.1 (range: 2~47), respectively. RESULTS: The overall 1-, 2-, and 5-year survival rates of patients were 60.0%, 36.7%, 13.3%, respectively. In comparison with stage IIIb (N=20), no significant difference in survival rate was observed (P=0.1178). In univariate analysis, we found that the presence of a recurrence (P=0.0121) and a P (positive lymph nodes)/R (total dissected lymph nodes) >0.6 were correlated with poor survival rates. Long- survivors (N=12, more than 24 months postoperatively) had a tendency to be younger, less recurrent (P=0.017) and less involvement of histological perineural invasion (P=0.028). CONCLUSION: The results of the present study indicate that stage IV patients without distant metastasis may indeed be cured by potentially curative surgery.
Classification* ; Gastrectomy* ; Hospitals, Municipal ; Humans ; Lymph Node Excision ; Lymph Nodes ; Neoplasm Metastasis ; Prognosis ; Recurrence ; Retrospective Studies ; Seoul ; Stomach Neoplasms* ; Stomach* ; Survival Rate ; Survivors

Carcinoid tumors are slow growing neoplasms that arise from enterochromaffin cells, with malignant potential, and those of the duodenum are rare neoplasms, with an incidence of 2.0~8.9% of all gastrointestinal carcinoid tumors. Duodenal carcinoid tumors rarely manifest gastrointestinal symptoms and carcinoid syndrome. A healthy 43 year old woman was admitted due to an incidentally detected duodenal mass during regular health screening. An abdominal CT scan and UGI series showed a polypoid mass at the second portion of the duodenum without bowel dilatation. The duodenoscopic finding was a carcinoid tumor, which was proven by immunohistochemical staining. A pylorus- preserving pancreatoduodenectomy was performed and a 2.5x2.2 cm sized submucosal tumor found at the second portion of the duodenum, with two periduodenal lymph node enlargements. Immunohistochemical staining showed that the tumor cells to have positive reaction for NSE, chromogranin and synaptophysin. Herein, our experience of a malignant duodenal carcinoid tumor is reported.
Adult ; Carcinoid Tumor* ; Dilatation ; Duodenum ; Enterochromaffin Cells ; Female ; Humans ; Incidence ; Lymph Nodes ; Mass Screening ; Pancreaticoduodenectomy ; Synaptophysin ; Tomography, X-Ray Computed

Splenic metastasis resulting from solid tumors is a rare event, and it is most often diagnosed at the time of autopsy. In those cases of widely disseminated cancer, splenic involvement may be fairly common, but solitary splenic metastasis in the absence of other metastases is exceedingly rare. The reported primary malignancies of patients with splenic metastases include lung, colorectal, endometrial, ovarian, thyroid, pancreatic, gastric cancers and most commonly, melanoma. The author report here on a case of 55- year-old male who was found to have a solitary splenic metastasis 12 months after undergoing a left upper lobectomy for stage Ib (pT2N0M0) adenocarcinoma of the lung and he was then treated by splenectomy.
Adenocarcinoma ; Autopsy ; Humans ; Lung Neoplasms ; Lung* ; Male ; Melanoma ; Neoplasm Metastasis* ; Splenectomy ; Splenic Neoplasms ; Stomach Neoplasms ; Thyroid Gland

PURPOSE: Although adenocarcinoma associated with anal fistula is rare, missed diagnosis may result in progression of the tumor and poor outcome. This study is aimed to determine the clinical features of adenocarcinoma associated with anal fistula. METHODS: The medical records of 8 (0.4%) cases associated with anal fistula, out of 1978 anorectal adenocarcinoma treated at Seoul National University Hospital between 1979 and 2000, were reviewed. RESULTS: The median age at diagnosis of cancer was 57 years (range, 39 to 62 years) and sex ratio was 7 to 1 with male predominance. The median duration of anal fistula before diagnosis of cancer was 8.5 years (range, 4 to 30 years). Major symptoms at diagnosis of cancer were perianal pain (38%) and discharge (38%). Perianal mass was palpable in all patients. All patients except for one case, in which palliative T-colostomy was performed due to extensive invasion despite preoperative radiation therapy, were treated with abdominoperineal resection: 4 in curative resection and 3 in palliative rsection. There were 4 (50%) in stage IV, 3 (38%) in stage III, and 1 (12%) in stage II. On median follow-up of 16 months (range, 3 to 72 months), systemic recurrences of 2 cases at lung or intraperitoneal cavity and 1 local recurrence at posterior vaginal wall were developed after curative resection. CONCLUSIONS: Adenocarcinoma associated with anal fistula had the history of long-standing anal fistula and perianal mass on physical examination. These tumors were detected at advanced stage and their outcomes were poor. Therefore, in the anal fistula combined with long-standing history or perianal mass, a high index of suspicion for malignancy is necessary and a generous biopsy of fistulous tract should be performed to rule out concomitant adenocarcinoma.
Adenocarcinoma* ; Biopsy ; Diagnosis ; Follow-Up Studies ; Humans ; Lung ; Male ; Medical Records ; Physical Examination ; Rectal Fistula* ; Recurrence ; Seoul ; Sex Ratio