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Original Article |
1 The Washington Cancer Institute, 106 Irving Street, Suite N3900, N.W., Washington, DC 20010, USA
2 Department of Pathology, Washington Hospital Center, Washington, DC, USA
Correspondence: Address correspondence and reprint requests to: P. H. Sugar-baker, MD, FACS, FRCS; E-mail: paul.sugarbaker{at}medstar.net
Background: Peritoneal dissemination of appendiceal malignancy combined with regional lymph node metastasis is an unusual combination of patterns of cancer dissemination.
Methods: A database of 501 appendiceal malignancy patients, all with documented peritoneal seeding, was used to identify 25 patients with involvement of the regional lymph nodes. All patients were uniformly treated with cytoreductive surgery plus perioperative intraperitoneal chemotherapy with mitomycin C and 5-fluorouracil. The clinical and pathologic features of the lymph nodepositive patients were compared with those of the lymph nodenegative patients. The effect of regional lymph node involvement on survival was determined. Within the group of lymph nodepositive patients, clinical and pathologic features were tested for their effect on survival.
Results: When compared with patients with no apparent lymph node positivity, patients with positive lymph nodes were more likely to have an acute abdomen as the initial presentation (P < .001). The intestinal (nonmucinous) histological type was more common (P < .001), and the disseminated peritoneal adenomucinosis histology was less common (P < .001). Survival with the aggressive treatment strategy used in these patients was not different for lymph nodepositive as compared with lymph nodenegative patients (P = .15 by univariate and P = .38 by multivariate analysis).
Conclusions: Appendiceal malignancy with dissemination to the lymph nodes has a more acute onset and a more frequent nonmucinous histology. With aggressive treatment strategies, lymph nodepositive patients did not show a statistically significantly diminished survival.
Key Words: Appendix neoplasms Pseudomyxoma peritonei Mucinous adenocarcinoma Lymphatic metastasis Peritoneal carcinomatosis
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