TITLE:
Markedly Elevated Serum CA 19-9 in Metastatic Lung Adenocarcinoma: A Diagnostic Challenge
AUTHORS:
Boon Hau Ng, Hsueh Jing Low, Nik Nuratiqah Nik Abeed, Nor Safiqah Sharil, Rose Azzlinda Osman, Andrea Yu-Lin Ban
KEYWORDS:
CA 19-9, Lung Adenocarcinoma, Tumour Markers
JOURNAL NAME:
Open Access Library Journal,
Vol.11 No.9,
September
30,
2024
ABSTRACT: Carbohydrate antigen 19-9 (CA 19-9) is a tumour-associated biomarker predominantly linked to pancreatic and colorectal cancers. Elevated serum levels of CA 19-9 in lung adenocarcinoma are rare, with few cases documented in the literature. Herein, we present two cases of metastatic lung adenocarcinoma with markedly elevated CA 19-9 levels, initially leading to a diagnostic suspicion of a pancreatic malignancy.