Abstract
We report the case of a 55-year-old woman with pulmonary adenocarcinoma and bone metastases who was diagnosed with paraneoplastic secretion of the beta subunit of human chorionic gonadotropin (beta-HCG) while being screened for inclusion in a clinical trial. Immunohistochemistry analysis of a bone biopsy revealed strong staining of cancer cells with anti-beta HCG antibodies. Serial measurements of circulating Beta HCG seemed to be influenced by antineoplastic treatments, although they were not strictly associated with tumour evolution assessed by CT scans. Little is known about paraneoplastic secretion of beta HCG, although it has been found in 12% to 24% of non-small cell lung cancers. Usefulness of serial measurements of beta HCG for monitoring NSCLC has yet to be demonstrated, but its use as a criterion for inclusion in clinical trials needs to be questioned.
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