1/127. Pineal metastasis as first clinical manifestation of colorectal adenocarcinoma. Case report.Cerebral metastases from colorectal adenocarcinomas occur in 8% of the cases. diagnosis is usually made when primary disease and widespread metastases are already known. We report the case of a patient with single metastases in the pineal region as the first clinical manifestation of a colorectal adenocarcinoma. A 48-year-old female with Parinaud's syndrome for 15 days prior her admission was evaluated in our clinic. She had no symptoms or signs of colorectal disease. MRI examination revealed an heterogeneous lesion with peritumoral gadolinium enhancement, located in the pineal region. The tumor was radically resected through an infratentorial/supracerebellar approach. histology showed metastatic carcinoma and immunohistochemical examination showed gastrointestinal tract adenocarcinoma. Metastases to the pineal region are extremely rare and should be considered in the differential diagnosis of tumors of this region.- - - - - - - - - - ranking = 1keywords = rate (Clic here for more details about this article) |
2/127. Colorectal cancer: genetics and screening.Colorectal cancer is a common disease in the western world. Most, if not all, colorectal cancers develop from previously benign adenomas. There are a number of genetic abnormalities including mutations in oncogenes and tumor suppressor genes which either present as a germline, or acquired defects lead to the development of colorectal cancer. Two well-defined hereditary colorectal cancer syndromes exist, hereditary nonpolyposis colorectal cancer syndrome and familial adenomatous polyposis coli, for which genetic testing is possible and advised. Guidelines for screening for colorectal cancer in average, moderate, and high risk patients are available from the american cancer society and were updated in 1997. The American Society of Clinical Oncology has published guidelines for genetic testing in a variety of cancers including colorectal cancer.- - - - - - - - - - ranking = 1keywords = rate (Clic here for more details about this article) |
3/127. Left extended hemihepatectomy with preservation of large inferior right hepatic vein: a case report.For hepatic function to be preserved after an extended hemihepatectomy adequate venous drainage of the remaining liver is required. Most metastases close to the confluence of the superior hepatic veins are considered unresectable because hepatic venous outflow after resection would be compromised. In 10-25% of people, the inferior right hepatic vein is of large calibre. Thus the superior hepatic veins may be sacrificed and hepatic function preserved if a large inferior right hepatic vein is present. A patient with involvement of segments 2, 4 and 8 by metastatic colorectal cancer is presented. This patient had a large inferior right hepatic vein, and so was able to undergo an extended left hemihepatectomy with ligation of all superior hepatic veins. Subsequent quality of life was maintained. This case illustrates that an 'unresectable' hepatic lesion can be actually resectable if an alternative venous drainage is present. A pre-operative search for a prominent inferior right hepatic vein by ultrasound, computerised tomography, or even magnetic resonance imaging should be considered in these cases.- - - - - - - - - - ranking = 1keywords = rate (Clic here for more details about this article) |
4/127. genetic testing and counseling for hereditary forms of colorectal cancer.The discovery of genes responsible for inherited forms of colorectal cancer have the potential to improve cancer risk assessment and counseling. Germline mutations (nonsense, frameshift) of APC are associated with familial adenomatous polyposis, an autosomal dominant syndrome, clinically characterized by young onset, hundreds of adenomatous polyps in the colon, and increased risk for extracolonic tumors. Mutations in APC are also associated with forms of attenuated familial adenomatous polyposis. Germline mutations in five mismatch repair related genes (hMSH2, hMLH1, hMSH6, hPMS1, and hPMS2) cause hereditary nonpolyposis colorectal cancer and are associated with increased risk of somatic genetic alterations and high dna microsatellite instability. Hereditary nonpolyposis colorectal cancer is characterized by young onset colorectal cancer, proximal colon location, and increased risk of extracolonic cancers. A missense mutation in APC (I1307K) is associated with some familial colorectal cancer in Ashkenazic jews. For persons at risk for hereditary forms of colorectal cancer, testing algorithms and gene test interpretations depend on identification of the pedigree germline gene mutation. Careful evaluation of the kindred for characteristic aggregation of tumor types among affected individuals and the availability of affected persons for testing are important issues in implementing genetic testing and follow-up management. case reports illustrate the importance of genetic counseling as a component of cancer genetic risk assessment. The genetic counseling process includes exploration of patient risk perception, sources of anxiety related to cancer risk, patient education (specific cancer-related issues, prevention/intervention options), discussion of possible gene test options, test limitations, and consequences of various gene test outcomes.- - - - - - - - - - ranking = 1keywords = rate (Clic here for more details about this article) |
5/127. actinomycosis mimicking a pelvic malignancy. A case report.BACKGROUND: Pelvic actinomycosis is difficult to diagnose preoperatively. The chronic infection is locally infiltrative and causes a profound induration of infected tissue planes. This induration, combined with absence of fever and leukocytosis, can mimic a pelvic malignancy. CASE: A 55-year-old woman was diagnosed with a pelvic mass after a two-month history of intermittent lower abdominal pain. The patient had had an intrauterine device for 12 years; it was removed two months prior to an exploratory laparotomy for the symptomatic mass. The mass was highly suggestive of colorectal cancer, with the rectosigmoid colon indurated and adherent to the uterus and sacrum. The induration of the colon extended caudally to within 3 cm of the anal verge. An abdominoperineal resection was performed along with a total abdominal hysterectomy, bilateral salpingo-oophorectomy and colostomy. pathology revealed acute and chronic endometritis, left tuboovarian abscess and extensive, acute inflammation of the rectosigmoid colon without evidence of diverticuli. actinomycosis was diagnosed based on the characteristic sulphur granules seen on hemotoxylin and eosin staining. CONCLUSION: actinomycosis can mimic pelvic and abdominal malignancies. Surgeons should be aware of this infection to potentially spare women morbidity from excessive surgical procedures.- - - - - - - - - - ranking = 1keywords = rate (Clic here for more details about this article) |
6/127. Colorectal carcinomas arising in the hyperplastic polyposis syndrome progress through the chromosomal instability pathway.The hyperplastic polyposis syndrome is characterized by the presence within the colon of multiple large hyperplastic polyps. We describe a case of hyperplastic polyposis syndrome associated with two synchronous carcinomas, one of which arises within a pre-existing hyperplastic lesion. comparative genomic hybridization was used to determine genetic changes in both carcinomas and several associated hyperplastic lesions. Microsatellite analysis at five loci was performed on carcinomas and representative hyperplastic polyps, and p53 status was analyzed by immunohistochemistry. Both carcinomas showed multiple genetic aberrations, including high level gains of 8q and 13q, and loss of 5q. These changes were not seen in the hyperplastic polyps. microsatellite instability was not seen in the carcinomas, four separate hyperplastic polyps, the hyperplastic polyp with mild adenomatous change associated with the carcinoma, or a separate serrated adenoma. allelic imbalance in the cancers at D5S346 and D17S938 suggested allelic loss of both p53 and APC, as well as at the loci D13S263, D13S174, D13S159, and D18S49. An early invasive carcinoma in one hyperplastic polyp stained for p53 protein, but the associated hyperplastic polyp was negative. In this case, neoplastic progression followed the typical genetic pathway of common colorectal carcinoma and occurred synchronously with mutation of p53.- - - - - - - - - - ranking = 3keywords = rate (Clic here for more details about this article) |
7/127. Postoperative management of local colorectal cancer: therapy and surveillance.Adjuvant therapy is widely recommended for stage III colon cancer and stages II and III rectal cancer. Although fluorouracil-based regimens are standard, newer agents either alone or in combination may improve response rates. Although nearly all patients enter a postoperative surveillance program after surgical resection, the clinical effectiveness of such surveillance, which is not standardized, is questionable. Critical review of the use of different components (laboratory, radiographic, and endoscopic) of these programs finds little support for intensive surveillance.- - - - - - - - - - ranking = 1keywords = rate (Clic here for more details about this article) |
8/127. Colorectal adenocarcinoma as a second malignant neoplasm following rhabdomyosarcoma of the urinary bladder: a case report.Following improvements in therapy for childhood malignancies, the striking increase in survival rate over the past 30 years has led to the increase risk of developing second malignant neoplasms (SMNs). We report a case of colorectal carcinoma as a SMN, following treatment for rhabdomyosarcoma. The patient was diagnosed with rhabdomyosarcoma of the urinary bladder at his age of three years, and developed adenocarcinoma in the colon 13 years later. Histologic examination of the surgical specimen revealed adenocarcinoma involving the rectosigmoid area with radiation colitis in its background. The tumor cells showed strong immunoreactivity for p53 protein, suggesting the role of irradiation and p53 mutation in carcinogenesis. This case emphasizes the need for dose observation in survivors of early childhood malignancies treated with radiation and multiagent chemotherapy.- - - - - - - - - - ranking = 1keywords = rate (Clic here for more details about this article) |
9/127. Hepatic sclerosing hemangioma mimicking a metastatic liver tumor: report of a case.We present herein the case of a sclerosing hemangioma of the liver which was extremely difficult to differentiate from liver metastasis of rectal cancer, in a 67-year-old woman. All the radiological findings were compatible with liver metastasis; however, marginal pooling of the tumor revealed by computed tomographic angiography and magnetic resonance imaging scans was inconsistent with a diagnosis of liver metastasis. At laparotomy, the tumor was macroscopically unusual in that it was yellowish elastic-hard with a very clear margin, and thus, it did not have the appearance of a metastatic tumor. Mile's operation and a partial hepatectomy were performed, followed by an uneventful postoperative course and no signs of recurrence. The carcinoembryonic antigen (CEA) level in the peripheral blood was not elevated at any time. The postoperative pathological diagnosis was a rare hepatic tumor, namely, a "sclerosing hemangioma," based on the findings of cellular fibrous stroma containing vascular channels with flattened endothelial cells. Preoperatively differentiating between sclerosing hemangioma and a metastatic liver tumor from colorectal cancer may be very difficult; however, this case demonstrated some interesting characteristics, namely, the serum CEA level was not elevated, marginal pooling of the tumor was found in the enhanced radiological findings, and the tumor was macroscopically unusual. Therefore, the possibility of sclerosing hemangioma should be borne in mind when considering the differential diagnosis of patients suspected of having colorectal liver metastasis. A preoperative biopsy should be carried out and when a laparotomy is performed under the misdiagnosis of colorectal liver metastasis, it is advisable that either an intraoperative needle biopsy or a frozen histological analysis be undertaken to avoid unnecessary extended hepatic resection of this rare benign hepatic tumor.- - - - - - - - - - ranking = 1keywords = rate (Clic here for more details about this article) |
10/127. Oxaliplatin-induced fever and release of IL-6.BACKGROUND: Oxaliplatin is a novel cytotoxic agent with documented activity in colorectal cancer. Side effects are generally moderate, and include peripheral neuropathy along with mild bone marrow suppression and gastrointestinal side effects. To our knowledge, induction of febrile episodes by this agents has not been described in the literature. CASE REPORT: We present the case of a 74-year-old male patient admitted to our institution for palliative treatment of metastatic colorectal carcinoma. Due to progression during treatment with 5-fluorouracil and leucovorin, chemotherapy consisting of oxaliplatin 85 mg/m(2) on days 1 15 plus mitomycin C 8 mg/m(2) on day 1 repeated every 28 days was initiated. The first cycle of this combination was tolerated without side effects, but the patient experienced fever up to 39 degrees C starting 2 h after oxaliplatin administration on day 15 of the second cycle, which persisted for 3 days. fever again recurred at the same interval following administration of oxaliplatin on day 1 of the next cycle. blood samples taken at regular intervals disclosed an increase in IL-6 serum levels parallel to the body temperature curve, with the peak corresponding to the highest temperature, while c-reactive protein values remained unchanged. In spite of intensive premedication with steroids, antipyretics and clarithromycin, fever promptly recurred during the third cycle of treatment. CONCLUSION: Our data suggest a clear- cut correlation between fever, the release of IL-6 and oxaliplatin administration. Whether IL-6 release is directly triggered by the application of oxaliplatin or is a bystander phenomenon, however, remains unclear at the moment.- - - - - - - - - - ranking = 2keywords = rate (Clic here for more details about this article) |
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