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  • Title: Elevated tumour markers are normalized in most patients with pseudomyxoma peritonei 7 days after complete tumour removal.
    Author: Di Fabio F, Aston W, Mohamed F, Chandrakumaran K, Cecil T, Moran B.
    Journal: Colorectal Dis; 2015 Aug; 17(8):698-703. PubMed ID: 25704482.
    Abstract:
    AIM: Elevation of the preoperative tumour markers in pseudomyxoma peritonei (PMP) is common and is a risk factor for recurrence. There has, however, been no documentation of the effect of complete tumour removal on tumour markers levels after cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC). The aim of the study was to compare the tumour markers 7 days after surgery in patients with elevated preoperative levels. METHOD: This was an observational prospective study of patients with PMP of appendiceal origin treated in one of the UK National Referral Centres for this condition. Thirty patients [median age = 61 (range: 31-74) years; six men] with an elevated preoperative level of carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA-125) and/or carbohydrate antigen 19-9 (CA19-9) underwent repeated estimation, 7 days after CRS and HIPEC for PMP. RESULTS: The median preoperative CEA level of 12 μg/l fell to 0.75 μg/l postoperatively (P < 0.0001), CA-125 fell from 45 to 31 kU/l (P = 0.183) and CA19-9 fell from 134 to 37 kU/l (P = 0.003). The CEA was raised in 22 (73%) of 30 patients preoperatively and in two (7%) of 30 patients 7 days after surgery (P < 0.0001). The corresponding data for CA-125 were 18 (60%) and 13 (43%) (P = 0.196) and for CA19-9 they were 24 (80%) and 16 (53%) (P = 0.028). CONCLUSION: This is the first documentation of a reduction or normalization of CEA 7 days after CRS, but not for CA19-9 or CA-125. This may indicate completeness of surgical resection and could aid selection for adjuvant therapy and predict prognosis. Long-term follow-up is, however, necessary to determine the significance of this observation.
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