Clonorchis sinensis, a liver fluke parasite, infects humans through ingestion of raw or undercooked fish, crabs, or crayfish in endemic areas where the parasite is found. Clonorchis sinensis infects the liver, gallbladder, and bile duct in humans, causing Clonorichiasis. Although the majority of patients are asymptomatic, long-lasting infections may cause severe disease. Without treatment, human infection may persist for the parasite's lifespan (25–30 years). Pathologic diagnosis can be challenging as sampling may demonstrate limited cellularity with minuscule eggs that may be overlooked. Here, we report a rare case of liver fluke eggs diagnosed in bile duct brush cytology.

中文翻译：

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胆管刷细胞学中的肝吸虫卵：胆道狭窄评估过程中的意外诊断

华支睾吸虫是一种肝吸虫寄生虫，通过在发现寄生虫的流行地区摄入生的或未煮熟的鱼、蟹或小龙虾来感染人类。华支睾吸虫感染人类的​​肝脏、胆囊和胆管，引起华支睾吸虫病。尽管大多数患者没有症状，但长期感染可能会导致严重的疾病。如果不进行治疗，人类感染可能会在寄生虫的整个生命周期（25-30 年）内持续存在。病理诊断可能具有挑战性，因为取样可能会显示出有限的细胞结构以及可能被忽视的微小卵子。在这里，我们报告一例在胆管刷细胞学中诊断为肝吸虫卵的罕见病例。