SIRM Foundation, Italian Society of Medical and Interventional Radiology (SIRM), Milan, Italy.
Medical Oncology Division, Igea SpA, Napoli, Italy.
Cancer Control. 2024 Jan-Dec;31:10732748241263644. doi: 10.1177/10732748241263644.
Intraductal papillary mucinous neoplasms (IPMNs) are a very common incidental finding during patient radiological assessment. These lesions may progress from low-grade dysplasia (LGD) to high-grade dysplasia (HGD) and even pancreatic cancer. The IPMN progression risk grows with time, so discontinuation of surveillance is not recommended. It is very important to identify imaging features that suggest LGD of IPMNs, and thus, distinguish lesions that only require careful surveillance from those that need surgical resection. It is important to know the management guidelines and especially the indications for surgery, to be able to point out in the report the findings that suggest malignant degeneration. The imaging tools employed for diagnosis and risk assessment are Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) with contrast medium. According to the latest European guidelines, MRI is the method of choice for the diagnosis and follow-up of patients with IPMN since this tool has a highest sensitivity in detecting mural nodules and intra-cystic septa. It plays a key role in the diagnosis of worrisome features and high-risk stigmata, which are associated with IPMNs malignant degeneration. Nowadays, the main limit of diagnostic tools is the ability to identify the precursor of pancreatic cancer. In this context, increasing attention is being given to artificial intelligence (AI) and radiomics analysis. However, these tools remain in an exploratory phase, considering the limitations of currently published studies. Key limits include noncompliance with AI best practices, radiomics workflow standardization, and clear reporting of study methodology, including segmentation and data balancing. In the radiological report it is useful to note the type of IPMN so as the morphological features, size, rate growth, wall, septa and mural nodules, on which the indications for surveillance and surgery are based. These features should be reported so as the surveillance time should be suggested according to guidelines.
导管内乳头状黏液性肿瘤(IPMNs)是患者影像学评估中非常常见的偶然发现。这些病变可能从低级别异型增生(LGD)进展为高级别异型增生(HGD),甚至发展为胰腺癌。IPMN 的进展风险随时间增长,因此不建议停止监测。识别提示 IPMN 低级别异型增生的影像学特征非常重要,从而区分仅需要密切监测的病变与需要手术切除的病变。了解管理指南,特别是手术适应证,对于能够在报告中指出提示恶性转化的发现非常重要。用于诊断和风险评估的影像学工具包括计算机断层扫描(CT)和磁共振成像(MRI)加造影剂。根据最新的欧洲指南,MRI 是诊断和随访 IPMN 患者的首选方法,因为该工具在检测壁结节和囊内分隔方面具有最高的敏感性。它在诊断令人担忧的特征和高危标志物方面发挥着关键作用,这些特征与 IPMN 的恶性转化相关。如今,诊断工具的主要局限性在于识别胰腺癌前体的能力。在这种情况下,人工智能(AI)和放射组学分析越来越受到关注。然而,考虑到目前发表的研究的局限性,这些工具仍处于探索阶段。主要限制包括不符合 AI 最佳实践、放射组学工作流程标准化以及清楚报告研究方法学,包括分割和数据平衡。在放射学报告中,注明 IPMN 的类型以及形态特征、大小、生长速度、壁、分隔和壁结节非常有用,这些特征是监测和手术适应证的基础。这些特征应该报告,以便根据指南建议监测时间。
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