Primary choroid plexus carcinoma producing carbohydrate antigen 19-9

An autopsy case of primary choroid plexus adenocarcinoma arising in a 40-ye ar-old female, who was associated with a high serum level of a carbohydrate antigen 19-9 (CA19-9), is herein presented. After a subtotal removal of a tumor in the left lateral ventricle, the serum level of CA19-9 decreased ra pidly, and immunohistochemical examinations of tumor tissue specimens obtai ned at surgery revealed intense reactivity for CA19-9. The present case may be the first example in which a primary choroid plexus carcinoma was shown to produce CA19-9.