Abstract
A high proportion of women with persistent low levels of hCG, in the absence of pregnancy or any evidence of tumor, have received chemotherapy and hysterectomy for assumed malignancy. Such chemotherapy and surgery were ineffective and unwarranted. This study identifies the causes of persistent low level of hCG and provides guidelines for the management of these patients, preventing unnecessary treatment in the future. The USA hCG Reference Service has consulted on 170 women with low levels of hCG persisting for 3 months or longer. Serum total hCG was measured in the Diagnostic Products Corporation (DPC) Immulite assay and hyperglycosylated hCG in the Nichols Advantage test. Among these 170 patients, the average persistent hCG result was 102 +/- 152 mIU/ml, with a range of 6.1-900 mIU/ml. Thirteen (7.6%) of the 170 patients had true malignancy, 5 had placental site trophoblastic tumor, 3 had other gestational trophoblastic neoplasms (GTN), and 5 had non-trophoblastic malignancies. The remaining 157 patients had false-positive hCG, quiescent gestational trophoblastic disease (quiescent GTD), or pituitary hCG (hCG of pituitary origin). Of 71 patients with false-positive hCG, 47 patients received chemotherapy and 9 had surgery that...Continue Reading
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