preputial concretion

例句：

1. 1.The patient had a preputial concretion that required surgical removal.
   患者有一个前庭结石，需要手术移除。
2. 2. The doctor advised the patient to follow a low-fiber diet and avoid certain foods to prevent further formation of preputial concretions.
   医生建议患者遵循低纤维饮食，并避免某些食物，以预防进一步形成前庭结石。
3. 3. Preputial concretions can cause significant discomfort and pain during sexual intercourse.
   前庭结石在性行为中会引起严重的不适和疼痛。