arXiv Machine Learning By Xiang Li, Yuqi Wang, Casey C. Heirman, Jihye Heo, Kyle J. Lafata

Lymphocyte Mimicry Correction via Region-Level Tissue Reasoning and Unbalanced Optimal Transport

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Loki-OT corrects lymphocyte mimicry by transferring region‑level tissue reasoning to individual cell predictions through Unbalanced Optimal Transport. It uses density priors from a pathology MLLM to guide ambiguous cell reassignment and distills the resulting transport plan into a lightweight MLP that learns context‑aware decision boundaries within pretrained cell‑foundation features. On the TCGA‑BRCA cohort, Loki‑OT outperformed a fully supervised PanopTILs classifier in patient‑level MAE and improved F1 scores in epithelium‑rich mimicry tissues.

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