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  • 1
    ISSN: 1530-0358
    Keywords: Ileal Pouch ; Ulcerative colitis ; Cancer ; Precancerous conditions ; Anus ; Rectum ; Surgery ; Treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Preservation of the anal transitional zone during ileal pouch-anal anastomosis is still controversial because of the risk of dysplasia and the theoretical risk of associated cancer. Without long-term follow-up data, the natural history and optimal treatment of anal transitional zone dysplasia are unknown. The aim of this study was to determine the long-term risk of dysplasia in the anal transitional zone and to evaluate the outcome of a conservative management policy for anal transitional zone dysplasia. METHODS: Two hundred ten patients undergoing anal transitional zone-sparing ileal pouch-anal anastomosis for ulcerative or indeterminate colitis between 1987 and 1992 and who were studied with serial anal transitional zone biopsies for at least five years postoperatively were included. Median follow up was 77 (range, 60–124) months. RESULTS: Anal transitional zone dysplasia developed in seven patients 4 to 51 (median, 11) months postoperatively. There was no association with gender, age, preoperative disease duration or extent of colitis, but the risk of anal transitional zone dysplasia was significantly increased in patients with prior cancer or dysplasia in the colon or rectum. Dysplasia was high grade in one and low grade in six. Two patients each with low-grade dysplasia detected on three separate occasions underwent mucosectomy 29 and 38 months after detection of low-grade dysplasia, but no cancer was found. The five other patients with dysplasia on one or two occasions were treated expectantly and were apparently dysplasia-free for a median of 72 (range, 48–100) months. CONCLUSIONS: Anal transitional zone dysplasia after ileal pouch-anal anastomosis is infrequent, is most common in the first two to three years postoperatively and may apparently disappear on repeated biopsy. Anal transitional zone preservation did not lead to the development of cancer in the anal transitional zone after five to ten years of follow-up. Long-term surveillance is recommended to monitor dysplasia. If repeat biopsy confirms persistent dysplasia, anal transitional zone excision with neoileal pouch-anal anastomosis is recommended.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of colorectal disease 8 (1993), S. 81-86 
    ISSN: 1432-1262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Les aspects clinico-pathologiques et le traitement chirurgical de 15 malades présentant un mélanome malin primitif ano-rectal ont été étudiés rétrospectivement. Il y avait une prépondérance féminine (2:1). L'âge moyen était de 66 ans. Le premier symptome commun était une rectorragie (87%) et ou une douleur anale (33%); 25% de ces mélanomes étaient achromiques. Le diamétre maximal de la tumeur était compris entre 0,8 et 8,4 cm (médiane 3,0 cm). Sur les tumeurs examinées histologiquement (n=12), l'épaisseur de la tumeru était comprise entre 0,9 et 11 mm (moyenne 6,1 mm). Tous ces mélanomes envahissaient au moins le tissu sub-épithélial (n=8) et/ou la sous muqueuse du rectum distal (n=4), avec une extension dans le sphincter anal interne (n=5) ou la lamina propria (n=3). L'échographie endorectale a montré de façon précise la profondeur de l'invasion chez 3 patients sur 3. Trois patients (20%), avec des métastases à distance lors de l'examen initial, ont eu une moyenne de survie de 8 mois. L'un de ces mélanomes primaires mesurait 0,8 cm. Sur les 12 patients ayant eu un traitement “curatif”-4 amputations abdomino-périnéales (AAP) et 8 excisions locales (LE)-l'incidence de récidive loco-régionale fut similaire (2/4 et 5/8). Tous les 7 patients avec une récidive loco-régionale ont développé des métastases à distance dans les 3 mois. La moyenne de survie était similaire après AAP ou LE dans le groupe total (25 mois versus 20 mois), chez les malades décédés (27 mois versus 24 mois), et chez ceux traités avec une intention curative (29 mois versus 22 mois). Il n'y a pas eu de survie à long terme mais 4 patients demeurent indemmes de récidive jusqu'à 19 mois après AAP (n=1) ou LE (n=3). Ainsi le mélanome ano-rectal a un pronostic défavorable et, lorsque cela est techniquement possible, l'excision locale semble avoir des résultats similaires à l'amputation abdomino-périnéales.
    Notes: Abstract Clinicopathologic features and surgical treatment of 15 patients with primary anorectal malignant melanoma were studied retrospectively. There was a female preponderance (2:1). The median age was 66 years. Common initial symptoms were rectal bleeding (87%) and/or anal pain (33%); 25% of the melanomas were amelanotic. The maximum tumor size ranged between 0.8 and 8.4 cm (median 3.0 cm). Of the tumors evaluated histologically (n=12), tumor thickness ranged from 0.9 to 11.3 mm (median 6.1 mm). All melanomas invaded at least into the subepithelial tissue (n=8) and/or the submucosa of the distal rectum (n=4), with extension into the internal anal sphincter (n=5) and lamina propria (n=3). Endoluminal ultrasound accurately demonstrated depth of invasion in 3 of 3 patients. Three (20%) patients with distant metastases at initial presentation had a mean survival of 8 mo; one of these primary melanomas measured 0.8 cm. Of 12 patients undergoing “curative” treatments — 4 by abdominoperineal resection (APR) and 8 by local excision (LE), the incidence of loco-regional recurrence was similar (2/4 and 5/8). All these 7 patients with loco-regional recurrence developed distant metastases within 3 months. The mean survival was similar between APR and LE in the total group (25 mo vs 20 mo), in the decreased (27 mo vs 24 mo) and in those treated with a curative intent (29 mo vs 22 mo). There was no long-term survivor but four patients remained tumor-free up to 19 mo after APR (n=1) or LE (n=3). Thus anorectal melanoma has a poor prognosis and, when technically feasible, LE appears to have similar results as APR.
    Type of Medium: Electronic Resource
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