[Diagnostic capability of carcinoembryonic antigen elevation]

Area of Science:

• Oncology
• Clinical Diagnostics

Background:

• Limited data exists on the diagnostic accuracy of carcinoembryonic antigen (CEA) levels exceeding three times the normal range.
• Understanding cancer prevalence in patients with mild CEA elevation is crucial for diagnostic strategies.

Purpose of the Study:

• To determine the prevalence of underlying cancer in patients with mild CEA elevation (3-10 ng/ml).
• To assess the mean cost associated with CEA determination in this patient group.

Main Methods:

• Retrospective analysis of 100 patients with CEA elevation (3-10 ng/ml) and suspected cancer from 2001-2007.
• Inclusion criteria: referral to gastroenterology or internal medicine outpatient units.

Main Results:

• Cancer was diagnosed in 7% of patients (gastric, lung, colon).
• No significant difference in baseline CEA levels was observed between cancer and non-cancer groups (p=0.2).
• The mean cost per patient for CEA determination was approximately 504 €.

Conclusions:

• Mild CEA elevation (3-10 ng/ml) is associated with a low prevalence of underlying malignancy.
• Diagnostic workup for these patients represents a considerable financial cost.