A Versatile Pathology Co-pilot via Reasoning Enhanced Multimodal Large Language Model

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Main Authors: Xu, Zhe, Liu, Ziyi, Hou, Junlin, Ma, Jiabo, Jin, Cheng, Wang, Yihui, Chen, Zhixuan, Zhang, Zhengyu, Huang, Fuxiang, Guo, Zhengrui, Zhou, Fengtao, Xu, Yingxue, Wang, Xi, Chan, Ronald Cheong Kin, Liang, Li, Chen, Hao
Format: Preprint
Published: 2025
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author Xu, Zhe
Liu, Ziyi
Hou, Junlin
Ma, Jiabo
Jin, Cheng
Wang, Yihui
Chen, Zhixuan
Zhang, Zhengyu
Huang, Fuxiang
Guo, Zhengrui
Zhou, Fengtao
Xu, Yingxue
Wang, Xi
Chan, Ronald Cheong Kin
Liang, Li
Chen, Hao
author_facet Xu, Zhe
Liu, Ziyi
Hou, Junlin
Ma, Jiabo
Jin, Cheng
Wang, Yihui
Chen, Zhixuan
Zhang, Zhengyu
Huang, Fuxiang
Guo, Zhengrui
Zhou, Fengtao
Xu, Yingxue
Wang, Xi
Chan, Ronald Cheong Kin
Liang, Li
Chen, Hao
contents Multimodal large language models (MLLMs) have emerged as powerful tools for computational pathology, offering unprecedented opportunities to integrate pathological images with language context for comprehensive diagnostic analysis. These models hold particular promise for automating complex tasks that traditionally require expert interpretation of pathologists. However, current MLLM approaches in pathology demonstrate significantly constrained reasoning capabilities, primarily due to their reliance on expensive chain-of-thought annotations. Additionally, existing methods remain limited to simplex application of visual question answering (VQA) at the region-of-interest (ROI) level, failing to address the full spectrum of diagnostic needs such as ROI classification, detection, segmentation, whole-slide-image (WSI) classification and VQA in clinical practice. In this study, we present SmartPath-R1, a versatile MLLM capable of simultaneously addressing both ROI-level and WSI-level tasks while demonstrating robust pathological reasoning capability. Our framework combines scale-dependent supervised fine-tuning and task-aware reinforcement fine-tuning, which circumvents the requirement for chain-of-thought supervision by leveraging the intrinsic knowledge within MLLM. Furthermore, SmartPath-R1 integrates multiscale and multitask analysis through a mixture-of-experts mechanism, enabling dynamic processing for diverse tasks. We curate a large-scale dataset comprising 2.3M ROI samples and 188K WSI samples for training and evaluation. Extensive experiments across 72 tasks validate the effectiveness and superiority of the proposed approach. This work represents a significant step toward developing versatile, reasoning-enhanced AI systems for precision pathology.
format Preprint
id arxiv_https___arxiv_org_abs_2507_17303
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle A Versatile Pathology Co-pilot via Reasoning Enhanced Multimodal Large Language Model
Xu, Zhe
Liu, Ziyi
Hou, Junlin
Ma, Jiabo
Jin, Cheng
Wang, Yihui
Chen, Zhixuan
Zhang, Zhengyu
Huang, Fuxiang
Guo, Zhengrui
Zhou, Fengtao
Xu, Yingxue
Wang, Xi
Chan, Ronald Cheong Kin
Liang, Li
Chen, Hao
Image and Video Processing
Artificial Intelligence
Computer Vision and Pattern Recognition
Multimodal large language models (MLLMs) have emerged as powerful tools for computational pathology, offering unprecedented opportunities to integrate pathological images with language context for comprehensive diagnostic analysis. These models hold particular promise for automating complex tasks that traditionally require expert interpretation of pathologists. However, current MLLM approaches in pathology demonstrate significantly constrained reasoning capabilities, primarily due to their reliance on expensive chain-of-thought annotations. Additionally, existing methods remain limited to simplex application of visual question answering (VQA) at the region-of-interest (ROI) level, failing to address the full spectrum of diagnostic needs such as ROI classification, detection, segmentation, whole-slide-image (WSI) classification and VQA in clinical practice. In this study, we present SmartPath-R1, a versatile MLLM capable of simultaneously addressing both ROI-level and WSI-level tasks while demonstrating robust pathological reasoning capability. Our framework combines scale-dependent supervised fine-tuning and task-aware reinforcement fine-tuning, which circumvents the requirement for chain-of-thought supervision by leveraging the intrinsic knowledge within MLLM. Furthermore, SmartPath-R1 integrates multiscale and multitask analysis through a mixture-of-experts mechanism, enabling dynamic processing for diverse tasks. We curate a large-scale dataset comprising 2.3M ROI samples and 188K WSI samples for training and evaluation. Extensive experiments across 72 tasks validate the effectiveness and superiority of the proposed approach. This work represents a significant step toward developing versatile, reasoning-enhanced AI systems for precision pathology.
title A Versatile Pathology Co-pilot via Reasoning Enhanced Multimodal Large Language Model
topic Image and Video Processing
Artificial Intelligence
Computer Vision and Pattern Recognition
url https://arxiv.org/abs/2507.17303