A variety of neoplastic and non-neoplastic lesions of the pancreas can present with a predominantly cystic architecture. These lesions are increasingly being detected as incidental findings on routine cross-sectional imaging following technological advances in these techniques and their widespread use. The different histopathological behaviors show various common and uncommon imaging findings, and some cases show similar appearance in spite of different histopathology. Each lesion requires specific management because of the differing risk of progression to malignancy, and an accurate imaging diagnosis is crucial. The typical imaging characteristics that differentiate pancreatic cystic lesions have been well described and fully summarized. However, in addition to a small percentage of cases that shows uncommon imaging findings, a substantial percentage of cystic lesions shows overlapping imaging findings that can lead to radiological misdiagnosis. For appropriate diagnosis and optimal treatment strategy, it is important to know the uncommon and overlapping imaging findings of these lesions, in addition to familiarity with the typical aspects. In this article, we reconfirm the well-known characteristic imaging features of pancreatic cystic lesions and present several diagnostically challenging cases, focusing on the uncommon and overlapping imaging findings.

胰腺的各种赘生性和非赘生性病变可能以囊性结构为主。随着这些技术的技术进步及其广泛使用，这些损伤越来越多地作为常规横截面成像的偶然发现被发现。不同的组织病理学行为显示出各种常见的和不常见的影像学发现，尽管组织病理学不同，但某些情况下也表现出相似的外观。每个病变都需要进行特殊处理，因为进展到恶性肿瘤的风险不同，准确的影像学诊断至关重要。区分胰腺囊性病变的典型影像学特征已得到充分描述和全面总结。但是，除了少数病例显示不常见的影像学表现外，很大比例的囊性病变显示影像学检查重叠，可能导致放射学误诊。对于适当的诊断和最佳治疗策略，除了熟悉典型方面之外，了解这些病变的罕见和重叠影像学发现也很重要。在本文中，我们再次确认了胰腺囊性病变的众所周知的特征性影像学特征，并提出了一些具有诊断挑战性的病例，重点是罕见的和重叠的影像学发现。