Elevated serum carcinoembryonic antigen (CEA) prior to specific treatment was noted in 3% (7/258) of assessable patients with testicular, extragonadal or ovarian germ cell tumours (GCT). In addition, persistently raised CEA was documented in 7% (26/385) of patients during or after cisplatin-based chemotherapy for metastatic GCT. Raised CEA did not appear associated with adverse prognosis. Among patients undergoing resection of residual tumour masses post-chemotherapy, 8 of 36 with mature differentiated teratoma excised had raised CEA compared with only one of 39 patients where no mature teratoma was found. However, CEA levels remained elevated in 6 of the 8 cases despite apparent complete resection of mature teratoma. Elevated CEA in treated GCT patients may be caused by hepatotoxicity from chemotherapy, intercurrent diseases, or other unknown factors. History of cisplatin-based chemotherapy may be a confounding factor in interpreting raised CEA levels. CEA measurements do not help in the management of patients with germ cell tumours.
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