BILIARY CYSTADENOCARCINOMA ARISING IN A CYSTADENOMA - REPORT OF A CASE DIAGNOSED BY FINE-NEEDLE ASPIRATION CYTOLOGY

Hepatic cyst fluid cytology tends to yield disappointing results. We r eport a case of a 56-year-old woman with a biliary cystadenocarcinoma diagnosed by fine needle aspiration cytology. Computed tomography scan s had shown a solitary, unilocular hepatic cyst over a five-year perio d. There was a recent increase in the size and development of a mural echogenic focus. Cytologic examination revealed clusters of malignant glandular cells in a background of cellular debris and mucinophages. T he resected specimen confirmed the presence of an adenocarcinoma arisi ng from malignant transformation of a pre-existing cystadenoma.