Ciliated hepatic foregut cyst mimicking neoplasm.
We describe a ciliated hepatic foregut cyst that was clinically considered neoplastic because it was large, bilocular, and associated with a high serological level of carbohydrate antigen 19-9 (CA 19-9). Histologically, the wall of the cyst showed characteristic pseudopapillae lined by ciliated stratified columnar epithelium with interspersed goblet cells and underlying smooth muscle. The epithelium was strongly immunoreactive for CA 19-9. We therefore conclude that large size, multilocularity, and elevated CA 19-9 do not exclude ciliated hepatic foregut cysts from diagnostic consideration.
Wu
M L
ML
Department of Pathology, Northwestern Memorial Hospital, Chicago, Illinois 60611, USA.
Abecassis
M M
MM
Rao
M S
MS
D000328:Adult; D018395:CA-19-9 Antigen / Q000032:analysis; D003560:Cysts / Q000175:diagnosis* / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008107:Liver Diseases / Q000175:diagnosis* / Q000473:pathology; D008113:Liver Neoplasms / Q000175:diagnosis*
D018395:CA-19-9 Antigen