L1CAM as a Negative Prognostic Factor in Endometrioid Endometrial Adenocarcinoma FIGO Stage IA-IB

Aims: In this study, we aimed to investigate how positivity for L1 cell adhesion molecule (L1CAM) was associated with outcome and relapse pattern in patients with Fédération Internationale de Gynécologie et d'Obstétrique (FIGO) stage IA-IB endometrial cancer. Materials and Methods: This retrospective study included 358 patients who underwent surgical treatment for endometrial carcinoma. Tumor samples from 312 patients (87.2%) were available for L1CAM analysis by immunohistochemistry. Results: Of the 312 tumor samples analyzed, 93 (29.8%) were L1CAM-positive. L1CAM positivity was significantly more common in grade 3 compared to grade 1-2 carcinomas (p=0.02). Patients with L1CAM positivity more commonly experienced disease progression. Distant metastasis was significantly associated with L1CAM positivity (p=0.01). Progression-free interval and overall survival did not significantly differ between L1CAM-positive and L1CAM-negative cases. Conclusion: L1CAM is a promising independent prognostic marker associated with aggressive tumor behavior and recurrence risk, but not with overall survival.

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