An idiosyncratic zonated stroma encapsulates desmoplastic liver metastases and originates from injured liver.

ABSTRACT: A perimetastatic capsule is a strong positive prognostic factor in liver metastases, but its origin remains unclear. Here, we systematically quantify the capsule's extent and cellular composition in 263 patients with colorectal cancer liver metastases to investigate its clinical significance and origin. We show that survival improves proportionally with increasing encapsulation and decreasing tumor-hepatocyte contact. Immunostaining reveals the gradual zonation of the capsule, transitioning from benign-like NGFR^high stroma at the liver edge to FAP^high stroma towards the tumor. Encapsulation correlates with decreased tumor viability and preoperative chemotherapy. In mice, chemotherapy and tumor cell ablation induce capsule formation. Our results suggest that encapsulat

SUBMITTER: Fernandez Moro C 

PROVIDER: S-EPMC10439160 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature