{Reference Type}: Case Reports
{Title}: Heavy black tea consumption and elevated CA 19-9 and CA 125 levels. A case report on a patient with ovarian endometriotic cysts.
{Author}: Pils S;Paternostro C;Mayerhoefer ME;Reinthaller A;Feichtinger M;
{Journal}: Gynecol Endocrinol
{Volume}: 35
{Issue}: 6
{Year}: Jun 2019
{Factor}: 2.277
{DOI}: 10.1080/09513590.2018.1564743
{Abstract}: In this case report, we present a case of false positive CA 19-9 and CA 125 levels in a patient with suspected endometriotic cysts. The patient is a 34-year-old nulliparous woman with heavy black tea consumption and elevated CA 19-9 and CA 125 levels. After discontinuation of black tea intake and careful exploration of other possible factors, CA 19-9 and CA 125 levels dropped markedly. As a conclusion, heavy black tea consumption can lead to false positive results of elevated CA 19-9 and CA 125 levels.