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Histopathological, Clinical, And Molecular (HICAM) score for patients with colorectal liver metastases
Berta Martín-Cullell1,2,3, Anna C Virgili1,2,3, Pau Riera4,5
1Medical Oncology Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
Background:
Histopathological and molecular features have been proposed to hold prognostic information, but few have been validated. The aim of this retrospective study was to validate the Genetic And Morphological Evaluation ('GAME') score and assess the impact of histological characteristics on the prognosis in patients with colorectal liver metastases.
Methods:
Data were collected from 176 patients with metastatic colorectal cancer undergoing liver resection at Hospital de la Santa Creu i Sant Pau. Patients were classified into Genetic And Morphological Evaluation score groups and relapse-free survival and overall survival were calculated. Histopathological changes in colorectal liver metastases were documented and prognostic variables were selected to create a post-surgery score, called the Histopathological, Clinical, And Molecular ('HICAM') score.
Results:
Regarding the Genetic And Morphological Evaluation score, the high-risk group had a median relapse-free survival of 8.8 months, compared with 20.5 months for the low-risk group (P = 0.005), and the high-risk group had a median overall survival of 37.8 months, compared with 67.0 months for the low-risk group (P = 0.005). Histological examination of 144 liver samples showed that the desertic immune phenotype was associated with worse overall survival in the multivariable analysis (P = 0.020). The Histopathological, Clinical, And Molecular score variables were age at diagnosis, tumour burden score, carcinoembryonic antigen levels greater than or equal to 20 ng/ml, primary tumour resection, TNM stage at diagnosis, molecular status, histopathological growth patterns, and immune phenotypes of the liver. The high-risk group had a median relapse-free survival of 8.4 months, compared with 20.4 months for the low-risk group (P < 0.001), and a median overall survival of 30.4 months, compared with 105.0 months for the low-risk group (P < 0.001).
Conclusion:
The Genetic And Morphological Evaluation score was validated as a preoperative prognostic tool to predict candidacy for liver resection. The Histopathological, Clinical, And Molecular score could be useful to assess adjuvant treatment after hepatic resection.
