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  • 1
    ISSN: 1530-0358
    Keywords: Flat adenoma ; Heredity ; Heterogeneity ; Colon cancer ; Linkage to chromosome 5q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We describe the clinical and pathologic features in four extended kindreds that are consistent with the hereditary flat adenoma syndrome (HFAS). This colon cancer susceptibility disorder is believed to be inherited as an autosomal dominant. The principal phenotypic marker is multiple colonic adenomas (usually less than 100), with a tendency for proximal location. The majority of these adenomas are flat or slightly raised and plaquelike, as opposed to polypoid. Colon cancers have typically developed in middle age and show no unusual histologic features. There are a variety of extracolonic manifestations, including adenomas and carcinomas of the small bowel and fundic gland polyps. The HFAS is contrasted with hereditary nonpolyposis colorectal cancer and familial adenomatous polyposis (FAP) and shown to be distinct from both in the numbers and distribution of colonic adenomas and the typical age of cancer diagnosis. The clinical implications of these findings are discussed. Given its linkage to the FAP locus on 5q and the phenotypic parallels between HFAS and FAP, we conclude that HFAS is a variant of FAP.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 36 (1993), S. 254-260 
    ISSN: 1530-0358
    Keywords: Lynch syndromes ; Natural history ; Cancer genetic diagnosis ; Cancer Control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The Lynch syndromes account for about 4 to 6 percent of the total colorectal cancer (CRC) burden. Despite more than two decades of documentation in the literature, many physicians fail to recognize the clinical features of these syndromes. The lack of premonitory physical stigmata, coupled with the absence of a biomarker of cancer susceptibility, mandates full reliance on a well-orchestrated family history for diagnosis. These deficiencies impede cancer control. Even if the diagnosis is made, proper surveillance and management measures that are responsive to the Lynch syndromes' natural history may fail to be implemented. We describe CRC occurrences in patients from four extended Lynch syndrome kindreds. Failures in cancer control were attributable to poor patient compliance and/or to limited physician knowledge about the natural history and surveillance recommendations for the Lynch syndromes. Physicians need to more effectively educate their high-risk patients about the significance of genetic risk, the natural history of CRC, and the appropriate surveillance strategies in the Lynch syndromes.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1530-0358
    Keywords: Desmoids ; Genetics ; Chemotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: The aim of this study was to describe the natural history and management of surgically unresectable intra-abdominal desmoid tumors in two patients with Gardner's syndrome from two unrelated families, where each had failed on conventional therapy. METHODS: Two patients with Gardner's syndrome were placed on a chemotherapy regimen which included doxorubicin (90 mg/m2) and dacarbazine (900 mg/m2) in divided doses over four days of continuous infusion. Their progress on chemotherapy was assessed by abdominal computerized tomography and laparoscopy. RESULTS: The computerized abdominal tomography scans proved difficult to interpret because of adhesions and matted small bowel resulting from the patients original colectomies. These findings made it difficult to differentiate postoperative changes from residual desmoid tumor. Second-look laparotomy in such patients was contraindicated as this may predispose to further desmoid production. Laparoscopy disclosed a complete response to this chemotherapy. Nevertheless, we had an iatrogenic small bowel perforation in one of these patients. Each patient showed a complete response to chemotherapy. CONCLUSION: Surgical resection remains the first-line treatment of intra-abdominal desmoid tumors. However, doxorubicin/ dacarbazine chemotherapy on a clinical trial basis may be indicated in patients whose intra-abdominal desmoid is unresectable, or who have failed to respond to treatment with hormones (tamoxifen, Toremifene), steroids (prednisone), and nonsteroidal anti-inflammatory agents (Clinoril®; Merck & Co., Inc., West Point, PA).
    Type of Medium: Electronic Resource
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